{"id":1317,"date":"2026-05-30T21:09:18","date_gmt":"2026-05-31T01:09:18","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1317"},"modified":"2026-05-30T21:09:18","modified_gmt":"2026-05-31T01:09:18","slug":"gb-t-1299-2000-alloy-tool-steels","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/th\/2026\/05\/30\/gb-t-1299-2000-alloy-tool-steels\/","title":{"rendered":"GB\/T 1299-2000 Alloy Tool Steels – Chinese National Standard"},"content":{"rendered":"
\n

\ud83d\udcc4 Original PDF:<\/strong> Download GB\/T 1299-2000 Alloy Tool Steels (PDF)<\/a><\/p>\n<\/div>\n

GB\/T 1299-2000 \u2014 Alloy Tool Steels<\/h1>\n

ICS 77.140.20<\/strong><\/p>\n

H 40<\/strong><\/p>\n

People’s Republic of China National Standard<\/strong><\/p>\n

GB\/T 1299\u20132000<\/strong><\/p>\n

Alloy Tool Steels<\/h1>\n

Published: 2000-10-25 | Implemented: 2001-09-01<\/p>\n

Issued by: State Bureau of Quality and Technical Supervision<\/p>\n

\n

Foreword<\/h2>\n

This standard is adopted non-equivalently from ASTM A681-1994 “Alloy Tool Steels” (USA).<\/p>\n

Compared with ASTM A681:<\/p>\n

  • For the 14 grades specified in this standard, their chemical compositions and heat treatment regimes for test specimens are basically the same as those in ASTM A681.<\/li>\n
  • The requirements for residual elements in this standard are stricter than those in the US standard.<\/li>\n
  • This standard has stricter requirements than the US standard regarding pearlite structure, network carbide, and eutectic carbide non-uniformity.<\/li>\n

    Compared with the previous standard:<\/p>\n

  • Four new grades have been added: 6CrMnSi2Mo1V, 5Cr3Mn1SiMo1V, 3Cr2MnNiMo, and 7CrSiMnMoV.<\/li>\n
  • This standard adds provisions for testing acid-etched macrostructure and cancels the fracture surface inspection of steel.<\/li>\n
  • This standard adds provisions for delivery in pre-hardened condition.<\/li>\n
  • This standard adds requirements for residual elements.<\/li>\n

    This standard replaces GB\/T 1299\u20131985 “Technical Conditions for Alloy Tool Steels” from the date of implementation.<\/p>\n

    Appendix A of this standard is a normative appendix.<\/p>\n

    Appendix B of this standard is an informative appendix.<\/p>\n

    This standard was proposed by the State Metallurgical Industry Bureau.<\/p>\n

    This standard is under the jurisdiction of the National Steel Standardization Technical Committee.<\/p>\n

    This standard was drafted by Shougang Special Steel Company and the Central Research Institute of Metallurgical Information and Standards.<\/p>\n

    Main drafters: Han Chunyu, Luan Yan, Zhang Weitang, Zhang Tiegang, Liu Baoshi, Dai Qiang.<\/p>\n

    This standard was first published in December 1977 and first revised in July 1985.<\/p>\n

    \n

    1 Scope<\/h2>\n

    This standard specifies the classification, dimensions, shape and permissible deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates for alloy tool steels.<\/p>\n

    This standard applies to hot-rolled, forged, cold-drawn, and bright alloy tool steels. Their chemical compositions also apply to ingots, blooms, and their finished products.<\/p>\n

    \n

    2 Normative References<\/h2>\n

    The following documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and parties using this standard should investigate the possibility of applying the latest editions of the following documents.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    Reference<\/th>\nTitle<\/th>\n<\/tr>\n
    GB\/T 222\u20131984<\/td>\nSampling and allowable deviation of finished chemical composition for steel chemical analysis<\/td>\n<\/tr>\n
    GB\/T 223 series<\/td>\nChemical analysis methods for iron, steel and alloy (various parts for different elements: P, Mn, Si, Al, Cr, V, Cu, Co, Ni, Mo, Nb, Ti, etc.)<\/td>\n<\/tr>\n
    GB\/T 224\u20131987<\/td>\nMethod for determination of decarburization depth of steel<\/td>\n<\/tr>\n
    GB\/T 226\u20131991<\/td>\nMethod for acid etch testing on macrostructure and defects of steel<\/td>\n<\/tr>\n
    GB\/T 230\u20131991<\/td>\nMetallic materials \u2014 Rockwell hardness test<\/td>\n<\/tr>\n
    GB\/T 231.1\u20132000<\/td>\nMetallic materials \u2014 Brinell hardness test \u2014 Part 1: Test method<\/td>\n<\/tr>\n
    GB\/T 908\u20131987<\/td>\nSteel forged round bars and square bars \u2014 Dimensions, shape, tolerances<\/td>\n<\/tr>\n
    GB\/T 911\u20131966<\/td>\nDimensions, shape, and tolerances of steel hot-rolled square bars<\/td>\n<\/tr>\n
    GB\/T 2101\u20131989<\/td>\nGeneral rules of inspection, packaging, marking, and certification for steel<\/td>\n<\/tr>\n<\/table>\n
    \n

    3 Classification<\/h2>\n

    Alloy tool steels are classified by application as follows:<\/p>\n

  • Carbon and low alloy cold work tool steels<\/strong> (Groups 1 and 2)<\/li>\n
  • Cold work die steels<\/strong> (Group 3)<\/li>\n
  • Hot work die steels<\/strong> (Groups 4 and 5)<\/li>\n
  • Plastic mold steels<\/strong> (Group 6)<\/li>\n
    \n

    4 Dimensions, Shape, and Permissible Deviations<\/h2>\n

    4.1 The dimensions and shape of hot-rolled round bars shall be as agreed upon in the contract. If not specified, the supplier shall determine them.<\/p>\n

    4.2 The dimensions, shape and permissible deviations of hot-rolled square bars shall be as agreed upon in the contract. If not specified, the supplier shall determine them.<\/p>\n

    4.3 The dimensions, shape and permissible deviations of hot-rolled hexagonal bars shall be as agreed upon in the contract. If not specified, the supplier shall determine them.<\/p>\n

    4.4 The dimensions, shape and permissible deviations of hot-rolled flat bars shall be as agreed upon in the contract. If not specified, the supplier shall determine them.<\/p>\n

    4.5 The dimensions, shape and permissible deviations of forged flat bars shall comply with GB\/T 16761. The group shall be specified in the contract; if not specified, the supplier shall determine.<\/p>\n

    4.6 The dimensions, shape and permissible deviations of other steel products (blooms) shall comply with the relevant national and industry standards. Items not covered by national or industry standards shall be agreed upon between the supplier and the purchaser.<\/p>\n

    \n

    5 Technical Requirements<\/h2>\n

    5.1 Grades and Chemical Composition<\/h3>\n

    5.1.1 The grades and chemical compositions (ladle analysis) of the steels shall comply with the provisions of Table 1.<\/p>\n

    5.1.1 Table 1 \u2014 Chemical Composition<\/h3>\n

    Group 1: Carbon and Low Alloy Tool Steels<\/h4>\n\n\n\n\n\n\n\n\n
    No.<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nUnified No.<\/th>\n\u0e0b\u0e35<\/th>\nSi<\/th>\nMn<\/th>\nCr<\/th>\nW<\/th>\nMo<\/th>\nV<\/th>\nOthers (max)<\/th>\nP (max)<\/th>\nS (max)<\/th>\n<\/tr>\n
    1-1<\/td>\n9SiCr<\/td>\nT30100<\/td>\n0.85\u20130.95<\/td>\n1.20\u20131.60<\/td>\n0.30\u20130.60<\/td>\n0.95\u20131.25<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    1-2<\/td>\n8MnSi<\/td>\nT30060<\/td>\n0.75\u20130.85<\/td>\n0.80\u20131.05<\/td>\n0.80\u20131.10<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    1-3<\/td>\nCr06<\/td>\nT30001<\/td>\n1.05\u20131.20<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n0.50\u20130.70<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    1-4<\/td>\nCr2<\/td>\nT30201<\/td>\n1.00\u20131.10<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n1.30\u20131.50<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    1-5<\/td>\n9Cr2<\/td>\nT30200<\/td>\n0.85\u20130.95<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n1.30\u20131.65<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    1-6<\/td>\nW<\/td>\nT30203<\/td>\n1.20\u20131.30<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n\u2013<\/td>\n0.80\u20131.10<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n<\/table>\n

    Group 2: Impact Tool Steels<\/h4>\n\n\n\n\n\n\n\n
    No.<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nUnified No.<\/th>\n\u0e0b\u0e35<\/th>\nSi<\/th>\nMn<\/th>\nCr<\/th>\nW<\/th>\nMo<\/th>\nV<\/th>\nOthers (max)<\/th>\nP (max)<\/th>\nS (max)<\/th>\n<\/tr>\n
    2-1<\/td>\n4CrW2Si<\/td>\nT40124<\/td>\n0.35\u20130.45<\/td>\n1.20\u20131.60<\/td>\n\u22640.50<\/td>\n1.00\u20131.30<\/td>\n2.00\u20132.50<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    2-2<\/td>\n5CrW2Si<\/td>\nT40125<\/td>\n0.45\u20130.55<\/td>\n1.20\u20131.60<\/td>\n\u22640.60<\/td>\n1.00\u20131.30<\/td>\n2.00\u20132.50<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    2-3<\/td>\n6CrW2Si<\/td>\nT40126<\/td>\n0.55\u20130.65<\/td>\n1.20\u20131.60<\/td>\n\u22640.50<\/td>\n0.90\u20131.20<\/td>\n2.00\u20132.70<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    2-4<\/td>\n6CrMnSi2Mo1V<\/td>\nT40100<\/td>\n0.50\u20130.60<\/td>\n1.50\u20131.80<\/td>\n0.80\u20131.10<\/td>\n0.80\u20131.10<\/td>\n\u2013<\/td>\n0.20\u20130.40<\/td>\n0.15\u20130.35<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    2-5<\/td>\n5Cr3Mn1SiMo1V<\/td>\nT40300<\/td>\n0.45\u20130.55<\/td>\n0.80\u20131.15<\/td>\n0.80\u20131.20<\/td>\n2.00\u20132.50<\/td>\n\u2013<\/td>\n0.80\u20131.20<\/td>\n0.80\u20131.20<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n<\/table>\n

    Group 3: Cold Work Die Steels<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    No.<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nUnified No.<\/th>\n\u0e0b\u0e35<\/th>\nSi<\/th>\nMn<\/th>\nCr<\/th>\nW<\/th>\nMo<\/th>\nV<\/th>\nOthers (max)<\/th>\nP (max)<\/th>\nS (max)<\/th>\n<\/tr>\n
    3-1<\/td>\nCr12<\/td>\nT21200<\/td>\n2.00\u20132.30<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n11.50\u201313.00<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-2<\/td>\nCr12Mo1V1<\/td>\nT21202<\/td>\n1.40\u20131.60<\/td>\n\u22640.60<\/td>\n\u22640.60<\/td>\n11.00\u201313.00<\/td>\n\u2013<\/td>\n0.80\u20131.20<\/td>\n0.70\u20131.10<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-3<\/td>\nCr12MoV<\/td>\nT21201<\/td>\n1.45\u20131.70<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n11.00\u201312.50<\/td>\n\u2013<\/td>\n0.40\u20130.60<\/td>\n0.15\u20130.30<\/td>\nCo: \u22641.00<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-4<\/td>\nCr5Mo1V<\/td>\nT20503<\/td>\n0.95\u20131.05<\/td>\n\u22640.50<\/td>\n\u22641.00<\/td>\n4.75\u20135.50<\/td>\n\u2013<\/td>\n0.90\u20131.40<\/td>\n0.15\u20130.50<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-5<\/td>\n9Mn2V<\/td>\nT20000<\/td>\n0.85\u20130.95<\/td>\n\u22640.40<\/td>\n1.70\u20132.00<\/td>\n\u22640.25<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.10\u20130.25<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-6<\/td>\nCrWMn<\/td>\nT20111<\/td>\n0.90\u20131.05<\/td>\n\u22640.40<\/td>\n0.80\u20131.10<\/td>\n0.90\u20131.20<\/td>\n1.20\u20131.60<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-7<\/td>\n9CrWMn<\/td>\nT20110<\/td>\n0.85\u20130.95<\/td>\n\u22640.40<\/td>\n0.90\u20131.20<\/td>\n0.50\u20130.80<\/td>\n0.50\u20130.80<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-8<\/td>\nCr4W2MoV<\/td>\nT20421<\/td>\n1.12\u20131.25<\/td>\n0.40\u20130.70<\/td>\n\u22640.40<\/td>\n3.50\u20134.00<\/td>\n1.90\u20132.60<\/td>\n0.80\u20131.20<\/td>\n0.80\u20131.10<\/td>\nNb: 0.20\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-9<\/td>\n6Cr4W3Mo2VNb<\/td>\nT20432<\/td>\n0.60\u20130.70<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n3.80\u20134.40<\/td>\n2.50\u20133.50<\/td>\n1.80\u20132.50<\/td>\n0.80\u20131.20<\/td>\nNb: 0.35\u20130.55<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-10<\/td>\n6W6Mo5Cr4V<\/td>\nT20465<\/td>\n0.55\u20130.65<\/td>\n\u22640.40<\/td>\n\u22640.60<\/td>\n3.70\u20134.30<\/td>\n6.00\u20137.00<\/td>\n4.50\u20135.50<\/td>\n0.70\u20131.10<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    3-11<\/td>\n7CrSiMnMoV<\/td>\nT20104<\/td>\n0.65\u20130.75<\/td>\n0.85\u20131.15<\/td>\n0.65\u20131.05<\/td>\n0.90\u20131.20<\/td>\n\u2013<\/td>\n0.20\u20130.50<\/td>\n0.15\u20130.30<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n<\/table>\n

    Group 4: Hot Work Die Steels<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    No.<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nUnified No.<\/th>\n\u0e0b\u0e35<\/th>\nSi<\/th>\nMn<\/th>\nCr<\/th>\nW<\/th>\nMo<\/th>\nV<\/th>\nAl<\/th>\nOthers (max)<\/th>\nP (max)<\/th>\nS (max)<\/th>\n<\/tr>\n
    4-1<\/td>\n5CrMnMo<\/td>\nT20102<\/td>\n0.50\u20130.60<\/td>\n0.25\u20130.60<\/td>\n1.20\u20131.60<\/td>\n0.60\u20130.90<\/td>\n\u2013<\/td>\n0.15\u20130.30<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-2<\/td>\n5CrNiMo<\/td>\nT20103<\/td>\n0.50\u20130.60<\/td>\n\u22640.40<\/td>\n0.50\u20130.80<\/td>\n0.50\u20130.80<\/td>\n\u2013<\/td>\n0.15\u20130.30<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-3<\/td>\n3Cr2W8V<\/td>\nT20280<\/td>\n0.30\u20130.40<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n2.20\u20132.70<\/td>\n7.50\u20139.00<\/td>\n\u2013<\/td>\n0.20\u20130.50<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-4<\/td>\n5Cr4Mo3SiMnVAl<\/td>\nT20403<\/td>\n0.47\u20130.57<\/td>\n0.80\u20131.10<\/td>\n0.80\u20131.10<\/td>\n3.80\u20134.30<\/td>\n2.80\u20133.40<\/td>\n0.80\u20131.20<\/td>\n0.80\u20131.10<\/td>\n\u2013<\/td>\nNi: \u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-5<\/td>\n3Cr3Mo3W2V<\/td>\nT20323<\/td>\n0.32\u20130.42<\/td>\n0.60\u20130.90<\/td>\n\u22640.65<\/td>\n2.80\u20133.30<\/td>\n1.20\u20131.80<\/td>\n2.50\u20133.00<\/td>\n0.80\u20131.20<\/td>\n\u2013<\/td>\nNi: 1.40<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-6<\/td>\n5Cr4W5Mo2V<\/td>\nT20452<\/td>\n0.40\u20130.50<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n3.40\u20134.40<\/td>\n4.50\u20135.30<\/td>\n1.50\u20132.10<\/td>\n0.70\u20131.10<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-7<\/td>\n8Cr3<\/td>\nT20300<\/td>\n0.75\u20130.85<\/td>\n\u22640.40<\/td>\n\u22640.40<\/td>\n3.20\u20133.80<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-8<\/td>\n4CrMnSiMoV<\/td>\nT20101<\/td>\n0.35\u20130.45<\/td>\n0.80\u20131.10<\/td>\n0.80\u20131.10<\/td>\n1.30\u20131.50<\/td>\n\u2013<\/td>\n0.40\u20130.60<\/td>\n0.20\u20130.40<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-9<\/td>\n4Cr3Mo3SiV<\/td>\nT20303<\/td>\n0.35\u20130.45<\/td>\n0.80\u20131.20<\/td>\n0.25\u20130.70<\/td>\n3.00\u20133.75<\/td>\n\u2013<\/td>\n2.00\u20133.00<\/td>\n0.25\u20130.75<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-10<\/td>\n4Cr5MoSiV<\/td>\nT20501<\/td>\n0.33\u20130.43<\/td>\n0.80\u20131.20<\/td>\n0.20\u20130.50<\/td>\n4.75\u20135.50<\/td>\n\u2013<\/td>\n1.10\u20131.60<\/td>\n0.30\u20130.60<\/td>\n\u2013<\/td>\nNi: 1.00<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-11<\/td>\n4Cr5MoSiV1<\/td>\nT20502<\/td>\n0.32\u20130.45<\/td>\n0.80\u20131.20<\/td>\n0.20\u20130.50<\/td>\n4.75\u20135.50<\/td>\n\u2013<\/td>\n1.10\u20131.75<\/td>\n0.80\u20131.20<\/td>\n\u2013<\/td>\nNi: 1.40<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    4-12<\/td>\n4Cr5W2VSi<\/td>\nT20520<\/td>\n0.32\u20130.42<\/td>\n0.80\u20131.20<\/td>\n\u22640.40<\/td>\n4.50\u20135.50<\/td>\n1.60\u20132.40<\/td>\n\u2013<\/td>\n0.60\u20131.00<\/td>\n\u2013<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n<\/table>\n

    Group 5: Non-magnetic Die Steels<\/h4>\n\n\n\n
    No.<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nUnified No.<\/th>\n\u0e0b\u0e35<\/th>\nSi<\/th>\nMn<\/th>\nCr<\/th>\nW<\/th>\nMo<\/th>\nV<\/th>\nAl<\/th>\nOthers (max)<\/th>\nP (max)<\/th>\nS (max)<\/th>\n<\/tr>\n
    5-1<\/td>\n7Mn15Cr2Al3V2WMo<\/td>\nT23152<\/td>\n0.65\u20130.75<\/td>\n\u22640.80<\/td>\n14.50\u201316.50<\/td>\n2.00\u20132.50<\/td>\n0.50\u20130.80<\/td>\n0.50\u20130.80<\/td>\n1.50\u20132.00<\/td>\n2.30\u20133.30<\/td>\n\u2013<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n<\/table>\n

    Group 6: Plastic Mold Steels<\/h4>\n\n\n\n\n
    No.<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nUnified No.<\/th>\n\u0e0b\u0e35<\/th>\nSi<\/th>\nMn<\/th>\nCr<\/th>\nW<\/th>\nMo<\/th>\nV<\/th>\nOthers (max)<\/th>\nP (max)<\/th>\nS (max)<\/th>\n<\/tr>\n
    6-1<\/td>\n3Cr2Mo<\/td>\nT22020<\/td>\n0.28\u20130.40<\/td>\n0.20\u20130.40<\/td>\n0.60\u20131.00<\/td>\n1.40\u20132.00<\/td>\n\u2013<\/td>\n0.30\u20130.55<\/td>\n\u2013<\/td>\nNi: 0.85<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n
    6-2<\/td>\n3Cr2MnNiMo<\/td>\nT22024<\/td>\n0.32\u20130.40<\/td>\n0.20\u20130.40<\/td>\n1.10\u20131.50<\/td>\n1.70\u20132.00<\/td>\n\u2013<\/td>\n0.25\u20130.40<\/td>\n\u2013<\/td>\nNi: 0.85\u20131.15<\/td>\n0.030<\/td>\n0.030<\/td>\n<\/tr>\n<\/table>\n

    5.1.2 For 5CrNiMo steel, with agreement between supplier and purchaser, vanadium content less than 0.20% is permitted.<\/p>\n

    5.1.3 The residual copper content in the steel shall not exceed 0.30%, and the sum of “copper + nickel” shall not exceed 0.55%.<\/p>\n

    5.1.4 The permissible deviations of chemical composition for steel or blooms shall comply with the provisions of Table 2 of GB\/T 222\u20131984.<\/p>\n

    5.2 Delivery Condition<\/h3>\n

    Steels are delivered in the annealed condition. Upon purchaser’s request, grades 7Mn15Cr2Al3V2WMo, 3Cr2Mo and 3Cr2MnNiMo may be delivered in the pre-hardened condition.<\/p>\n

    5.3 Macrostructure<\/h3>\n

    Steels shall be tested for acid-etched macrostructure. The acid-etched macro-test pieces shall not show visually apparent pipe, inclusions, laminations, cracks, blowholes, or white spots. Central porosity and ingot-type segregation shall be assessed according to the Level 3 chart of this standard, and shall comply with the provisions of Table 2.<\/p>\n

    Table 2 \u2014 Macrostructure Acceptance Criteria (levels, not exceeding)<\/h4>\n\n\n\n\n\n\n\n\n\n
    Section Size (mm)<\/th>\n**Group 1**<\/th>\n<\/th>\n**Group 2**<\/th>\n<\/th>\n<\/tr>\n
    <\/td>\nCentral Porosity<\/td>\nIngot-Type Segregation<\/td>\nCentral Porosity<\/td>\nIngot-Type Segregation<\/td>\n<\/tr>\n
    \u226450<\/td>\n4.0<\/td>\n6.0<\/td>\n3.0<\/td>\n6.0<\/td>\n<\/tr>\n
    >50\u201375<\/td>\n4.5<\/td>\n6.0<\/td>\n3.5<\/td>\n6.0<\/td>\n<\/tr>\n
    >75\u2013100<\/td>\n4.5<\/td>\n6.0<\/td>\n4.5<\/td>\n6.0<\/td>\n<\/tr>\n
    >100\u2013125<\/td>\n5.0<\/td>\n6.0<\/td>\n4.5<\/td>\n6.0<\/td>\n<\/tr>\n
    >125\u2013155<\/td>\n5.0<\/td>\n6.0<\/td>\n5.0<\/td>\n6.0<\/td>\n<\/tr>\n
    >155<\/td>\nTo be agreed between supplier and purchaser<\/td>\n<\/tr>\n<\/table>\n

    Note 1:<\/strong> Group 1 includes: Grades 1-1 through 1-6; 2-1 through 2-3; 3-4 through 3-8; 3-11; 4-1 through 4-2; 4-7 through 4-12; 6-1 through 6-2.<\/p>\n

    Note 2:<\/strong> All remaining grades belong to Group 2.<\/p>\n

    5.4 Hardness<\/h3>\n

    5.4.1 The hardness in the delivered condition and the hardened hardness of test specimens shall comply with the provisions of Table 3. If the supplier can guarantee that the hardened hardness of test specimens meets the requirements of Table 3, testing may be waived.<\/p>\n

    5.4.2 Upon purchaser’s request and by mutual agreement, annealed 9SiCr steel for the manufacture of threading tools shall have a Brinell hardness of 187\u2013229 HBW 10\/3000.<\/p>\n

    5.4.3 Hot work die steels are not subject to hardened hardness testing of test specimens.<\/p>\n

    Table 3 \u2014 Hardness Requirements<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    No.<\/th>\nGroup<\/th>\n\u0e40\u0e01\u0e23\u0e14<\/th>\nBrinell Hardness HBW 10\/3000 (Delivered)<\/th>\nAustenitizing Temp.<\/th>\nCooling Medium<\/th>\nHardness HRC (not less than)<\/th>\n<\/tr>\n
    1-1<\/td>\n<\/td>\n9SiCr<\/td>\n241\u2013197<\/td>\n860\u2013880 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    1-2<\/td>\n<\/td>\n8MnSi<\/td>\n\u2264229<\/td>\n780\u2013800 \u00b0C<\/td>\nOil<\/td>\n60<\/td>\n<\/tr>\n
    1-3<\/td>\n<\/td>\nCr06<\/td>\n\u2264179<\/td>\n780\u2013810 \u00b0C<\/td>\nWater<\/td>\n64<\/td>\n<\/tr>\n
    1-4<\/td>\n<\/td>\nCr2<\/td>\n\u2264179<\/td>\n800\u2013830 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    1-5<\/td>\n<\/td>\n9Cr2<\/td>\n\u2264179<\/td>\n800\u2013830 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    1-6<\/td>\n<\/td>\nW<\/td>\n\u2264187<\/td>\n810\u2013830 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    2-1<\/td>\n<\/td>\n4CrW2Si<\/td>\n\u2264229<\/td>\n860\u2013900 \u00b0C<\/td>\nOil<\/td>\n53<\/td>\n<\/tr>\n
    2-2<\/td>\n<\/td>\n5CrW2Si<\/td>\n\u2264229<\/td>\n860\u2013900 \u00b0C<\/td>\nOil<\/td>\n55<\/td>\n<\/tr>\n
    2-3<\/td>\n<\/td>\n6CrW2Si<\/td>\n285\u2013229<\/td>\n860\u2013900 \u00b0C<\/td>\nOil<\/td>\n57<\/td>\n<\/tr>\n
    2-4<\/td>\n<\/td>\n6CrMnSi2Mo1V<\/td>\n\u2264269<\/td>\n860\u2013890 \u00b0C<\/td>\nOil<\/td>\n58<\/td>\n<\/tr>\n
    2-5<\/td>\n<\/td>\n5Cr3Mn1SiMo1V<\/td>\n\u2264255<\/td>\n870\u2013900 \u00b0C<\/td>\nOil<\/td>\n56<\/td>\n<\/tr>\n
    3-1<\/td>\nCold work die<\/td>\nCr12<\/td>\n269\u2013217<\/td>\n950\u2013980 \u00b0C<\/td>\nOil<\/td>\n60<\/td>\n<\/tr>\n
    3-2<\/td>\n<\/td>\nCr12Mo1V1<\/td>\n255\u2013207<\/td>\n950\u20131000 \u00b0C, hold 10\u201320 min, air cool, 200 \u00b0C<\/td>\nOil<\/td>\n59<\/td>\n<\/tr>\n
    3-3<\/td>\n<\/td>\nCr12MoV<\/td>\n269\u2013217<\/td>\n950\u2013980 \u00b0C<\/td>\nOil<\/td>\n58<\/td>\n<\/tr>\n
    3-4<\/td>\n<\/td>\nCr5Mo1V<\/td>\n\u2264269<\/td>\n950 \u00b0C (salt bath) or 960 \u00b0C (controlled atmosphere), hold 5\u201315 min, air cool, 200 \u00b1 6 \u00b0C<\/td>\nOil<\/td>\n60<\/td>\n<\/tr>\n
    3-5<\/td>\n<\/td>\n9Mn2V<\/td>\n\u2264229<\/td>\n780\u2013810 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    3-6<\/td>\n<\/td>\nCrWMn<\/td>\n255\u2013207<\/td>\n800\u2013830 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    3-7<\/td>\n<\/td>\n9CrWMn<\/td>\n241\u2013197<\/td>\n800\u2013830 \u00b0C<\/td>\nOil<\/td>\n62<\/td>\n<\/tr>\n
    3-8<\/td>\n<\/td>\nCr4W2MoV<\/td>\n\u2264269<\/td>\n960\u2013980 \u00b0C, 1020\u20131040 \u00b0C<\/td>\nOil<\/td>\n60<\/td>\n<\/tr>\n
    3-9<\/td>\n<\/td>\n6Cr4W3Mo2VNb<\/td>\n\u2264255<\/td>\n1100\u20131160 \u00b0C<\/td>\nOil<\/td>\n60<\/td>\n<\/tr>\n
    3-10<\/td>\n<\/td>\n6W6Mo5Cr4V<\/td>\n\u2264269<\/td>\n1180\u20131200 \u00b0C<\/td>\nOil<\/td>\n60<\/td>\n<\/tr>\n
    3-11<\/td>\n<\/td>\n7CrSiMnMoV<\/td>\n\u2264235<\/td>\n870\u2013900 \u00b0C<\/td>\nAir cool<\/td>\n60<\/td>\n<\/tr>\n
    4-1<\/td>\nHot work die<\/td>\n5CrMnMo<\/td>\n\u2264229<\/td>\n820\u2013850 \u00b0C<\/td>\nOil<\/td>\n42<\/td>\n<\/tr>\n
    4-2<\/td>\n<\/td>\n5CrNiMo<\/td>\n\u2264229<\/td>\n830\u2013860 \u00b0C<\/td>\nOil<\/td>\n44<\/td>\n<\/tr>\n
    4-3<\/td>\n<\/td>\n3Cr2W8V<\/td>\n\u2264255<\/td>\n1075\u20131125 \u00b0C<\/td>\nOil<\/td>\n44<\/td>\n<\/tr>\n
    4-4<\/td>\n<\/td>\n5Cr4Mo3SiMnVAl<\/td>\n\u2264229<\/td>\n1090\u20131120 \u00b0C<\/td>\nOil<\/td>\n46<\/td>\n<\/tr>\n
    4-5<\/td>\n<\/td>\n3Cr3Mo3W2V<\/td>\n\u2264235<\/td>\n1075\u20131125 \u00b0C<\/td>\nOil<\/td>\n46<\/td>\n<\/tr>\n
    4-6<\/td>\n<\/td>\n5Cr4W5Mo2V<\/td>\n\u2264229<\/td>\n1090\u20131120 \u00b0C<\/td>\nOil<\/td>\n48<\/td>\n<\/tr>\n
    4-7<\/td>\n<\/td>\n8Cr3<\/td>\n\u2264229<\/td>\n850\u2013880 \u00b0C<\/td>\nOil<\/td>\n42<\/td>\n<\/tr>\n
    4-8<\/td>\n<\/td>\n4CrMnSiMoV<\/td>\n\u2264229<\/td>\n860\u2013890 \u00b0C<\/td>\nOil<\/td>\n46<\/td>\n<\/tr>\n
    4-9<\/td>\n<\/td>\n4Cr3Mo3SiV<\/td>\n\u2264229<\/td>\n1000\u20131050 \u00b0C<\/td>\nOil<\/td>\n46<\/td>\n<\/tr>\n
    4-10<\/td>\n<\/td>\n4Cr5MoSiV<\/td>\n\u2264235<\/td>\n900 \u00b0C (salt bath) or 910 \u00b0C (controlled atmosphere) \u00b1 6 \u00b0C, hold 5\u201315 min<\/td>\nAir cool<\/td>\n54<\/td>\n<\/tr>\n
    4-11<\/td>\n<\/td>\n4Cr5MoSiV1<\/td>\n\u2264235<\/td>\n900 \u00b0C (salt bath) or 910 \u00b0C (controlled atmosphere) \u00b1 6 \u00b0C, hold 5\u201315 min<\/td>\nAir cool<\/td>\n54<\/td>\n<\/tr>\n
    4-12<\/td>\n<\/td>\n4Cr5W2VSi<\/td>\n\u2264235<\/td>\n900 \u00b0C (salt bath) or 910 \u00b0C (controlled atmosphere) \u00b1 6 \u00b0C, hold 5\u201315 min<\/td>\nAir cool<\/td>\n54<\/td>\n<\/tr>\n
    5-1<\/td>\nNon-magnetic die<\/td>\n7Mn15Cr2Al3V2WMo<\/td>\n\u2014<\/td>\nSolution treatment at 1000\u20131050 \u00b0C<\/td>\nWater<\/td>\n45<\/td>\n<\/tr>\n
    6-1<\/td>\nPlastic mold<\/td>\n3Cr2Mo<\/td>\n\u2264229<\/td>\n\u2014<\/td>\n\u2014<\/td>\n28\u201334<\/td>\n<\/tr>\n
    6-2<\/td>\nPlastic mold<\/td>\n3Cr2MnNiMo<\/td>\n\u2264229<\/td>\n\u2014<\/td>\n\u2014<\/td>\n34\u201338<\/td>\n<\/tr>\n<\/table>\n

    Notes to Table 3:<\/strong><\/p>\n

  • a) Tempering at 200 \u00b0C: one tempering cycle for 2 hours; at 550 \u00b0C: two tempering cycles, 2 hours each.<\/li>\n
  • b) For controlled atmosphere hardening, the holding time at temperature is 5\u201315 min (10\u201320 min for Cr12Mo1V1).<\/li>\n
  • c) Grade 7Mn15Cr2Al3V2WMo may be supplied in hot-rolled condition without delivery hardness testing.<\/li>\n

    5.5 Microstructure<\/h3>\n

    5.5.1 Pearlite Structure<\/h4>\n

    5.5.1.1 Annealed 9SiCr, Cr2, CrWMn, 9CrWMn, Cr06, W and 9Cr2 steels shall be inspected for pearlite structure and assessed according to Level 1 chart of this standard. The acceptable grade is 1\u20135.<\/p>\n

    5.5.1.2 Steels for hot-working do not require pearlite structure inspection. Upon purchaser’s request and by mutual agreement, annealed 9SiCr steel for threading tools shall have a pearlite structure grade of 2\u20134.<\/p>\n

    5.5.2 Network Carbide<\/h4>\n

    5.5.2.1 Annealed CrWMn, Cr2, Cr06 and 9SiCr steels shall be inspected for network carbide and assessed according to Level 2 chart of this standard.<\/p>\n

    For CrWMn, Cr2, Cr06 and 9SiCr steels with cross-section not exceeding 60 mm, the acceptable grade is not exceeding Level 3. Upon purchaser’s request and by agreement, annealed 9SiCr steel (\u226460 mm) for threading tools shall not exceed Level 2.<\/p>\n

    For flat bars and steels with cross-section greater than 60 mm, the acceptable grade shall be agreed upon between the supplier and the purchaser.<\/p>\n

    5.5.2.2 Steels for hot-working do not require network carbide inspection.<\/p>\n

    5.5.3 Eutectic Carbide Non-Uniformity<\/h4>\n

    5.5.3.1 Annealed Cr12, Cr12MoV, Cr12Mo1V1, 6W6Mo5Cr4V and 6Cr4W3Mo2VNb steels shall be inspected for eutectic carbide non-uniformity and assessed according to Chart 4 of GB\/T 14979. The acceptable grades shall comply with Table 4.<\/p>\n

    When the supplier guarantees compliance, 6Cr4W3Mo2VNb steel may be exempted from inspection.<\/p>\n

    Upon purchaser’s request and by mutual agreement, Grade I supply group as shown in Table 4 may apply.<\/p>\n

    ##### Table 4 \u2014 Acceptable Grades for Eutectic Carbide Non-Uniformity<\/p>\n\n\n\n\n\n\n
    Steel Diameter or Thickness (mm)<\/th>\nAcceptable Grade<\/th>\n<\/tr>\n
    \u226450<\/td>\n3<\/td>\n<\/tr>\n
    >50\u201370<\/td>\n4<\/td>\n<\/tr>\n
    >70\u2013120<\/td>\n5<\/td>\n<\/tr>\n
    >120<\/td>\n6<\/td>\n<\/tr>\n<\/table>\n

    5.5.3.2 For flat bars, the acceptable grade of eutectic carbide non-uniformity shall be agreed upon between the supplier and the purchaser.<\/p>\n

    5.6 Decarburization<\/h3>\n

    5.6.1 The total single-side decarburization depth (ferrite + transition zone) of hot-rolled and forged steels shall comply with Table 5. Upon purchaser’s request and by mutual agreement, Group I may apply. For cold-drawn steels, the total single-side decarburization depth, except for silicon-containing alloy steels, shall not exceed 1.5% of the nominal dimension; for silicon-containing alloy steels, it shall not exceed 2% of the nominal dimension. Bright steel surfaces shall not have any decarburization layer. The total decarburization depth for flat bars and steels with diameter (thickness) greater than 150 mm shall be agreed upon between the supplier and the purchaser.<\/p>\n

    Table 5 \u2014 Total Decarburization Depth (mm)<\/h4>\n\n\n\n\n
    Steel Diameter or Thickness<\/th>\nTotal Decarburization Depth (not exceeding)<\/th>\n<\/th>\n<\/tr>\n
    <\/td>\nGroup I<\/td>\nGroup II<\/td>\n<\/tr>\n
    >5\u2013150<\/td>\n0.25 + 1% D<\/td>\n0.20 + 2% D<\/td>\n<\/tr>\n<\/table>\n

    Note:<\/strong> D = nominal cross-section dimension of the steel.<\/p>\n

    5.6.2 The decarburization depth for 6W6Mo5Cr4V, 4Cr3Mo3SiV and 3Cr3Mo3W2V steels shall be agreed upon between the supplier and the purchaser.<\/p>\n

    5.6.3 The non-magnetic die steel 7Mn15Cr2Al3V2WMo is not subject to decarburization testing.<\/p>\n

    5.7 Magnetic Permeability<\/h3>\n

    The non-magnetic die steel 7Mn15Cr2Al3V2WMo shall have a magnetic permeability less than 1.01. When the supplier guarantees compliance, testing may be waived.<\/p>\n

    5.8 Surface Quality<\/h3>\n

    5.8.1 Hot-rolled and forged steels for pressure working shall not have visually visible cracks, laps, scabs, or inclusions on the surface. If such defects exist, they must be removed. The removal depth from the actual dimension shall comply with Table 6. The removal width shall not be less than 5 times the depth. Other minor surface defects within half the tolerance may remain unremoved.<\/p>\n

    Table 6 \u2014 Allowable Removal Depth (mm)<\/h4>\n\n\n\n\n\n
    Steel Diameter or Thickness<\/th>\nAllowable Removal Depth (same cross-section)<\/th>\n<\/tr>\n
    <80<\/td>\nHalf tolerance<\/td>\n<\/tr>\n
    80\u2013140<\/td>\nFull tolerance<\/td>\n<\/tr>\n
    >140<\/td>\nAs agreed between supplier and purchaser<\/td>\n<\/tr>\n<\/table>\n

    5.8.2 Hot-rolled and forged steels for machining may have local defects not exceeding the depth specified in Table 7 from the nominal dimension.<\/p>\n

    Table 7 \u2014 Allowable Depth of Local Defects (mm)<\/h4>\n\n\n\n\n
    Steel Diameter or Thickness<\/th>\nAllowable Depth of Local Defects<\/th>\n<\/tr>\n
    <80<\/td>\nHalf tolerance<\/td>\n<\/tr>\n
    >80<\/td>\nFull tolerance<\/td>\n<\/tr>\n<\/table>\n

    5.8.3 Cold-drawn steel surfaces shall be clean and free of scale and cracks. Slight oxidation color or light oxide layer is permitted. For cold-drawn steels of grades 9 and 10 precision, no surface defects are permitted. For grades 11 and 12 precision, minor surface defects such as pits, individual scratches, hairline cracks, scars, dark spots, tearing, and lubricant traces are permitted, provided the depth does not exceed the tolerance of the nominal dimension from the actual dimension. Upon purchaser’s request, the defect depth may not exceed half the tolerance of the nominal dimension. Bright steel shall comply with GB\/T 3207.<\/p>\n

    5.8.4 Surface quality of flat bars shall be agreed upon between the supplier and the purchaser.<\/p>\n

    5.9 Special Requirements<\/h3>\n

    Upon purchaser’s request and by mutual agreement, the following additional inspection items may be added for alloy tool steels. Their test methods, number of tests, assessment criteria, and acceptable grades shall be agreed upon between the supplier and the purchaser and specified in the contract:<\/p>\n

  • a) Non-metallic inclusions<\/li>\n
  • b) Austenite grain size<\/li>\n
  • c) Fatigue testing<\/li>\n
    \n

    6 Test Methods<\/h2>\n

    The test methods for inspection items of steel shall comply with the provisions of Table 8.<\/p>\n

    Table 8 \u2014 Test Methods<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    No.<\/th>\nInspection Item<\/th>\n\u0e1b\u0e23\u0e34\u0e21\u0e32\u0e13<\/th>\nTest Method<\/th>\nSampling Location<\/th>\n<\/tr>\n
    1<\/td>\n\u0e2d\u0e07\u0e04\u0e4c\u0e1b\u0e23\u0e30\u0e01\u0e2d\u0e1a\u0e17\u0e32\u0e07\u0e40\u0e04\u0e21\u0e35<\/td>\n1<\/td>\nGB\/T 222, GB\/T 223<\/td>\nCorresponding to ingot head<\/td>\n<\/tr>\n
    2<\/td>\nMacrostructure<\/td>\n1<\/td>\nGB\/T 226<\/td>\nDifferent steel blooms or bars<\/td>\n<\/tr>\n
    3<\/td>\nDecarburization<\/td>\n3<\/td>\nGB\/T 224<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    4<\/td>\nBrinell hardness<\/td>\n3<\/td>\nGB\/T 231.1<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    5<\/td>\nRockwell hardness<\/td>\n2<\/td>\nGB\/T 230<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    6<\/td>\nPearlite structure<\/td>\n2<\/td>\nGB\/T 13298<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    7<\/td>\nNetwork carbide<\/td>\n2<\/td>\nGB\/T 13298<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    8<\/td>\nEutectic carbide non-uniformity<\/td>\n2<\/td>\nGB\/T 13298 \/ GB\/T 14979<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    9<\/td>\nMagnetic permeability<\/td>\n1<\/td>\nSpecified method<\/td>\nAny end of the steel<\/td>\n<\/tr>\n
    10<\/td>\nShape, dimensions<\/td>\nAll<\/td>\nSpecified method<\/td>\n\u2014<\/td>\n<\/tr>\n
    11<\/td>\nSurface<\/td>\nAll<\/td>\n\u0e01\u0e32\u0e23\u0e15\u0e23\u0e27\u0e08\u0e2a\u0e2d\u0e1a\u0e14\u0e49\u0e27\u0e22\u0e2a\u0e32\u0e22\u0e15\u0e32<\/td>\n\u2014<\/td>\n<\/tr>\n<\/table>\n
    \n

    7 Inspection Rules<\/h2>\n

    7.1 Inspection and Acceptance<\/h3>\n

    The inspection and acceptance of steel shall be conducted by the supplier’s quality inspection department.<\/p>\n

    7.2 Batch Rules<\/h3>\n

    Steels shall be accepted in batches. Each batch shall consist of steels of the same grade, heat number, and specification, and shall be inspected and accepted in accordance with the relevant provisions.<\/p>\n

    7.3 Resampling<\/h3>\n

    If any test result does not meet the standard requirements, resampling shall be performed in accordance with relevant provisions.<\/p>\n

    7.4 Packaging and Marking<\/h3>\n

    Packaging, marking, and quality certificates shall comply with the provisions of GB\/T 2101.<\/p>\n

    \n

    Appendix A (Normative) \u2014 Reference Charts<\/h2>\n

    A1 \u2014 Level Chart 1: Pearlite Structure<\/h3>\n

    Charts depicting pearlite structure grades 1 through 6 are provided in the original standard as visual reference plates.<\/p>\n

    A2 \u2014 Level Chart 2: Network Carbide<\/h3>\n

    Charts depicting network carbide grades 1 through 4 are provided in the original standard as visual reference plates.<\/p>\n

    A3 \u2014 Level Chart 3: Macrostructure<\/h3>\n

    Charts depicting central porosity (grades 1\u20135) and ingot-type segregation (grades 1\u20135) are provided in the original standard as visual reference plates.<\/p>\n

    \n

    Appendix B (Informative) \u2014 Comparison of Die and Mold Steel Grades<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    No.<\/th>\nGB\/T 1299\u20132000 Grade<\/th>\nUS ASTM A681\u20131994 Equivalent<\/th>\n<\/tr>\n
    1-6<\/td>\nW<\/td>\nF1<\/td>\n<\/tr>\n
    2-2<\/td>\n5CrW2Si<\/td>\nS1<\/td>\n<\/tr>\n
    2-4<\/td>\n6CrMnSi2Mo1V<\/td>\nS5<\/td>\n<\/tr>\n
    2-5<\/td>\n5Cr3Mn1SiMo1V<\/td>\nS7<\/td>\n<\/tr>\n
    3-1<\/td>\nCr12<\/td>\nD3<\/td>\n<\/tr>\n
    3-2<\/td>\nCr12Mo1V1<\/td>\nD2<\/td>\n<\/tr>\n
    3-4<\/td>\nCr5Mo1V<\/td>\nA2<\/td>\n<\/tr>\n
    4-2<\/td>\n5CrNiMo<\/td>\nL6<\/td>\n<\/tr>\n
    4-3<\/td>\n3Cr2W8V<\/td>\nH21<\/td>\n<\/tr>\n
    4-9<\/td>\n4Cr3Mo3SiV<\/td>\nH10<\/td>\n<\/tr>\n
    4-10<\/td>\n4Cr5MoSiV<\/td>\nH11<\/td>\n<\/tr>\n
    4-11<\/td>\n4Cr5MoSiV1<\/td>\nH13<\/td>\n<\/tr>\n
    6-1<\/td>\n3Cr2Mo<\/td>\nP20<\/td>\n<\/tr>\n
    6-2<\/td>\n3Cr2MnNiMo<\/td>\n718<\/td>\n<\/tr>\n<\/table>\n
    \n

    Document end \u2014 GB\/T 1299-2000<\/em><\/p>\n

    \n

    Original Document (PDF)<\/h2>\n
    \n