{"id":1311,"date":"2026-05-29T21:57:53","date_gmt":"2026-05-30T01:57:53","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1311"},"modified":"2026-05-29T21:57:53","modified_gmt":"2026-05-30T01:57:53","slug":"gb-t-6394-2002-metal-average-grain-size-rating-chart-english","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/ru\/2026\/05\/29\/gb-t-6394-2002-metal-average-grain-size-rating-chart-english\/","title":{"rendered":"GB\/T 6394-2002 \u2014 Metal Average Grain Size Rating Chart (English)"},"content":{"rendered":"<h2>GB\/T 6394-2002 \u2014 Metal Average Grain Size Rating Chart<\/h2>\n<p><strong>Metallographic Structure Standard Atlas \u2014 Metal Average Grain Size Determination Chart GB\/T 6394-2002<\/strong><\/p>\n<hr>\n<h3>Series I \u2014 Non-Twinned Grains (Light Etching) \u00d7100<\/h3>\n<p>Grain size grades ranging from 00 to 8, showing non-twinned austenite grains under light etching at 100\u00d7 magnification.<\/p>\n<h4>Grade 00 \u2013 Grade 2<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-page-1.jpg\" alt=\"Grain Size Grade 00 to 2\" title=\"\"><\/p>\n<h4>Grade 2\u00bd \u2013 Grade 5<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-page-2.jpg\" alt=\"Grain Size Grade 2.5 to 5\" title=\"\"><\/p>\n<h4>Grade 5\u00bd \u2013 Grade 8<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-page-3.jpg\" alt=\"Grain Size Grade 5.5 to 8\" title=\"\"><\/p>\n<hr>\n<h3>Series II \u2014 Twinned Grains (Light Etching) \u00d7100<\/h3>\n<p>Grain size grades 3 through 8, showing twinned austenite grains under light etching at 100\u00d7 magnification.<\/p>\n<h4>Grades 3 \u2013 8<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-page-4.jpg\" alt=\"Grain Size Grade 3 to 8, Twinned Grains\" title=\"\"><\/p>\n<hr>\n<h3>Series IV \u2014 Austenite Grains in Steel (Carburizing Method) \u00d7100<\/h3>\n<p>Austenite grain size determination using the carburizing method at 100\u00d7 magnification.<\/p>\n<h4>Grade 1 \u2013 Grade 6<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-page-5.jpg\" alt=\"Austenite Grain Size Grade 1 to 6\" title=\"\"><\/p>\n<h4>Grade 7 \u2013 Grade 8<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-page-6.jpg\" alt=\"Austenite Grain Size Grade 7 to 8\" title=\"\"><\/p>\n<hr>\n<h3>Download Original PDF<\/h3>\n<p>Click the link below to view or download the original Chinese version of this grain size rating chart:<\/p>\n<p><a href=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/05\/grain-size-chart-GB6394-2002.pdf\" target=\"_blank\" rel=\"noopener\">\ud83d\udce5 Download Original PDF \u2014 GB\/T 6394-2002 Grain Size Rating Chart<\/a><\/p>\n<hr>\n<p><em>Note: This chart follows the Chinese National Standard GB\/T 6394-2002 (equivalent to ASTM E112 grain size methodology). Grain size number (G) relates to the average grain area \u2014 higher numbers indicate finer grains.<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>GB\/T 6394-2002 \u2014 Metal Average Grain Size Rating Chart Metallographic Structure Standard Atlas \u2014 Metal Average Grain Size Determination Chart GB\/T 6394-2002 Series I \u2014 Non-Twinned Grains (Light Etching) \u00d7100 Grain size grades ranging from 00 to 8, showing non-twinned austenite grains under light etching at 100\u00d7 magnification. Grade 00 \u2013 Grade 2 Grade 2\u00bd [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[259,258,257,256,261,260,198],"class_list":["post-1311","post","type-post","status-publish","format-standard","hentry","category-blog","tag-astm-e112","tag-austenite-grain","tag-gb-t-6394-2002","tag-grain-size-chart","tag-material-science","tag-metal-testing","tag-metallography"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/posts\/1311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/comments?post=1311"}],"version-history":[{"count":1,"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/posts\/1311\/revisions"}],"predecessor-version":[{"id":1312,"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/posts\/1311\/revisions\/1312"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/media?parent=1311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/categories?post=1311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/ru\/wp-json\/wp\/v2\/tags?post=1311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}