{"id":69518,"date":"2026-05-17T17:26:43","date_gmt":"2026-05-17T17:26:43","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/astm-a860-m-asme-sa860-m\/"},"modified":"2026-05-19T15:29:17","modified_gmt":"2026-05-19T15:29:17","slug":"astm-a860-m-asme-sa860-m","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/astm-a860-m-asme-sa860-m\/","title":{"rendered":"ASTM A860 M \/ ASME SA860 M"},"content":{"rendered":"<h2>Technical Overview of the ASTM\/ASME A\/SA 860 Standard<\/h2>\n<p>\nThe ASTM\/ASME A\/SA 860 specification regulates the production of wrought high-strength ferritic steel butt-welding fittings. This standard covers seamless as well as electric-welded fittings and fully complies with the requirements of ASME B16.9 and MSS-SP-75 standards. For items with geometric parameters outside the scope of these standards, additional S58 requirements according to the A960\/A960M specification apply. Components supplied by EV Group China are optimally suited for use in oil and gas transmission pipelines and high-pressure fluid distribution systems.\n<\/p>\n<p>\nEV Group China provides the capability to adapt fittings to individual customer requirements. Specific requests that fall outside of standard configurations must be defined at the technical specification stage.\n<\/p>\n<p>\nThis standard does not apply to cast pipe fittings or fittings produced by the casting method.\n<\/p>\n<p>\nThe documentation uses two systems of measurement: inch-pound and SI units. If the marking does not contain the &#8220;M&#8221; index (metric system), the inch-pound parameters take priority.\n<\/p>\n<p>\nValues provided in different systems are not direct mathematical equivalents; therefore, engineering calculations must be based on a single chosen system of measurement to avoid loss of accuracy and deviations from specifications.\n<\/p>\n<h2>Chemical Composition of Steels for ASTM A860 \/ A860M (ASME SA860 \/ SA860M) Fittings<\/h2>\n<table class=\"table table-bordered table-hover\">\n<thead>\n<tr>\n<th>C max.<\/th>\n<th>Mn<\/th>\n<th>P max.<\/th>\n<th>S max.<\/th>\n<th>Si<\/th>\n<th>Ni max.<\/th>\n<th>Cr max.<\/th>\n<th>Mo max.<\/th>\n<th>Cu max.<\/th>\n<th>Ti max.<\/th>\n<th>V max.<\/th>\n<th>Nb max.<\/th>\n<th>Al max.<\/th>\n<th>Fe<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0.20<sup>a<\/sup><\/td>\n<td>1.00-1.45<\/td>\n<td>0.03<\/td>\n<td>0.01<\/td>\n<td>0.15-0.40<sup>b<\/sup><\/td>\n<td>0.50<sup>c<\/sup><\/td>\n<td>0.30<sup>c<\/sup><\/td>\n<td>0.25<sup>c<\/sup><\/td>\n<td>0.35<sup>c<\/sup><\/td>\n<td>0.05<\/td>\n<td>0.10<\/td>\n<td>0.04<\/td>\n<td>0.06<\/td>\n<td>Remainder<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><sup>a<\/sup> Carbon equivalent (CE), calculated by the formula CE = C + Mn\/6 + (Cr + Mo + V)\/5 + (Ni + Cu)\/15, shall not exceed 0.42%.<\/p>\n<p><sup>b<\/sup> When vacuum induction deoxidation is used, silicon content is limited to 0.10% (heat analysis) and 0.12% (product analysis).<\/p>\n<p><sup>c<\/sup> The total content of alloying elements Ni + Cr + Mo + Cu is strictly limited to < 1.00%.<\/p>\n<h2>Mechanical Properties of ASTM A 860 \/ A 860M (ASME SA 860 \/ SA 860M) Fittings<\/h2>\n<table class=\"table table-bordered table-hover\">\n<thead>\n<tr>\n<th>Grade<\/th>\n<th>Yield Strength (0.2% offset), min., ksi [MPa]<\/th>\n<th>Tensile Strength, min., ksi [MPa]<\/th>\n<th>Elongation (4D), min., %<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>WPHY 42<\/td>\n<td>42 [290]<\/td>\n<td>60 [415] &#8211; 85 [585]<\/td>\n<td>25<\/td>\n<\/tr>\n<tr>\n<td>WPHY 46<\/td>\n<td>46 [315]<\/td>\n<td>63 [435] &#8211; 88 [605]<\/td>\n<td>25<\/td>\n<\/tr>\n<tr>\n<td>WPHY 52<\/td>\n<td>52 [360]<\/td>\n<td>66 [455] &#8211; 91 [625]<\/td>\n<td>25<\/td>\n<\/tr>\n<tr>\n<td>WPHY 60<\/td>\n<td>60 [415]<\/td>\n<td>75 [515] &#8211; 100 [690]<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>WPHY 65<\/td>\n<td>65 [450]<\/td>\n<td>77 [530] &#8211; 102 [705]<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>WPHY 70<\/td>\n<td>70 [485]<\/td>\n<td>80 [550] &#8211; 105 [725]<\/td>\n<td>20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><sup>a<\/sup> The allowable test load shall not exceed 15 KSI [105 MPa].<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[112],"class_list":["post-69518","wiki","type-wiki","status-publish","hentry","wiki_category-astm"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69518","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\/69518\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69518"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}