{"id":69906,"date":"2026-05-17T17:28:48","date_gmt":"2026-05-17T17:28:48","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/astm-b103\/"},"modified":"2026-05-19T15:32:07","modified_gmt":"2026-05-19T15:32:07","slug":"astm-b103","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/astm-b103\/","title":{"rendered":"ASTM B103"},"content":{"rendered":"

Scope and Technical Specifications per ASTM B103<\/h2>\n

The international standard ASTM B103 defines technical requirements for the supply of plate, sheet, strip, and rolled bar metal products manufactured from copper alloys with the addition of tin, lead, and zinc. EV Group China products comply with these specifications, ensuring stable physical and mechanical parameters for critical engineering tasks.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
UNS Alloy<\/th>\nCopper (%)<\/th>\nTin (%)<\/th>\nZinc (%)<\/th>\nLead (%)<\/th>\nFormer Designation<\/th>\n<\/tr>\n<\/thead>\n
C51000<\/td>\n95<\/td>\n5<\/td>\n–<\/td>\n–<\/td>\nA1<\/td>\n<\/tr>\n
C51100<\/td>\n96<\/td>\n4<\/td>\n–<\/td>\n–<\/td>\nA<\/td>\n<\/tr>\n
C51180<\/td>\n96<\/td>\n4<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
C51900<\/td>\n94<\/td>\n6<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
C52100A<\/sup><\/td>\n92<\/td>\n8<\/td>\n–<\/td>\n–<\/td>\nC<\/td>\n<\/tr>\n
C52180<\/td>\n92<\/td>\n8<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
C52400<\/td>\n90<\/td>\n10<\/td>\n–<\/td>\n–<\/td>\nD<\/td>\n<\/tr>\n
C53400<\/td>\n94<\/td>\n5<\/td>\n–<\/td>\n1<\/td>\nB1<\/td>\n<\/tr>\n
C54400<\/td>\n88<\/td>\n4<\/td>\n3<\/td>\n4<\/td>\nB2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Phosphor bronzes supplied by EV Group China possess optimal characteristics for deep drawing, stamping, and mechanical forming processes. These materials are indispensable in the production of precision springs, electrical terminals, and connectors in the electronics industry. Leaded phosphor bronzes are characterized by increased corrosion resistance and improved machinability. Bearing alloys in this category are used for manufacturing wear-resistant bushings and thrust washers operating under high dynamic loads.<\/p>\n

Note:<\/em> All listed alloys contain phosphorus, which acts as a deoxidizer during the heat treatment process, significantly enhancing the strength and anti-friction properties of the metal.<\/p>\n

In the ASTM B103 specification, values are provided in both inch-pound and SI units. These systems are independent, and their combination in calculations is not permitted in accordance with the standard requirements.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[112],"class_list":["post-69906","wiki","type-wiki","status-publish","hentry","wiki_category-astm"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69906","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\/69906\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69906"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}