{"id":69891,"date":"2026-05-17T17:28:43","date_gmt":"2026-05-17T17:28:43","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/astm-b138\/"},"modified":"2026-05-19T15:32:00","modified_gmt":"2026-05-19T15:32:00","slug":"astm-b138","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/astm-b138\/","title":{"rendered":"ASTM B138"},"content":{"rendered":"<h2>Technical Purpose and Operational Characteristics<\/h2>\n<p>The ASTM B138 standard establishes strict requirements for the physical-mechanical parameters and geometric tolerances of bar stock (rods) and shaped profiles manufactured from manganese bronze grades UNS C67000, C67500, and C67600. Products supplied by EV Group China fully comply with these specifications, ensuring high corrosion resistance and excellent machinability under critical mechanical loads.<\/p>\n<p>Materials of these grades are widely in demand in heavy engineering, the marine industry, and the production of critical friction components, where the alloy&#8217;s ability to maintain stable properties when exposed to aggressive environments is required.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[112],"class_list":["post-69891","wiki","type-wiki","status-publish","hentry","wiki_category-astm"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69891","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\/69891\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69891"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}