{"id":69566,"date":"2026-05-17T17:26:59","date_gmt":"2026-05-17T17:26:59","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/jis-g3429\/"},"modified":"2026-05-19T15:29:37","modified_gmt":"2026-05-19T15:29:37","slug":"jis-g3429","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/jis-g3429\/","title":{"rendered":"JIS G3429"},"content":{"rendered":"<h2>Specification and Purpose of the Standard<\/h2>\n<p>This Japanese Industrial Standard (JIS G3429) specifies the technical requirements for seamless steel pipes intended for the manufacture of high-pressure vessels (gas cylinders). The regulation covers products used in production, in accordance with the provisions of JIS B 8230 and JIS B 8241. EV Group China specialists ensure the supply of rolled steel that strictly complies with these characteristics, guaranteeing the reliability of products during operation under high pressure.<\/p>\n<p><em>Technical Notes:<\/em><\/p>\n<ul>\n<li>All physical and chemical indicators specified in brackets {} comply with the international SI system of units and are provided for reference purposes.<\/li>\n<li>The regulatory framework has been updated to reflect the transition to SI metric standards adopted for industrial use.<\/li>\n<\/ul>\n<h2>Chemical Composition of Steel Grades according to JIS G3429<\/h2>\n<table class=\"table table-bordered table-hover\">\n<thead>\n<tr>\n<th>Steel<\/th>\n<th>C<\/th>\n<th>Si<\/th>\n<th>Mn<\/th>\n<th>P<\/th>\n<th>S<\/th>\n<th>Ni<\/th>\n<th>Cr<\/th>\n<th>Mo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>STH11<\/td>\n<td>&lt;0.50<\/td>\n<td>0.10-0.35<\/td>\n<td>&lt;1.80<\/td>\n<td>&lt;0.035<\/td>\n<td>&lt;0.035<\/td>\n<td>&#8211;<\/td>\n<td>&#8211;<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<tr>\n<td>STH12<\/td>\n<td>0.30-0.41<\/td>\n<td>0.10-0.35<\/td>\n<td>1.35-1.70<\/td>\n<td>&lt;0.030<\/td>\n<td>&lt;0.030<\/td>\n<td>&#8211;<\/td>\n<td>&#8211;<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<tr>\n<td>STH21<\/td>\n<td>0.25-0.35<\/td>\n<td>0.15-0.35<\/td>\n<td>0.40-0.90<\/td>\n<td>&lt;0.030<\/td>\n<td>&lt;0.030<\/td>\n<td>&lt;0.25<\/td>\n<td>0.80-1.20<\/td>\n<td>0.15-0.30<\/td>\n<\/tr>\n<tr>\n<td>STH22<\/td>\n<td>0.33-0.38<\/td>\n<td>0.15-0.35<\/td>\n<td>0.40-0.90<\/td>\n<td>&lt;0.030<\/td>\n<td>&lt;0.030<\/td>\n<td>&lt;0.25<\/td>\n<td>0.80-1.20<\/td>\n<td>0.15-0.30<\/td>\n<\/tr>\n<tr>\n<td>STH31<\/td>\n<td>0.35-0.40<\/td>\n<td>0.10-0.50<\/td>\n<td>1.20-1.50<\/td>\n<td>&lt;0.030<\/td>\n<td>&lt;0.030<\/td>\n<td>0.50-1.00<\/td>\n<td>0.30-0.60<\/td>\n<td>0.15-0.25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[118],"class_list":["post-69566","wiki","type-wiki","status-publish","hentry","wiki_category-jis"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69566","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69566\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69566"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}