Kỹ thuật

Materials Bolt Grade Nut Grade Diameter Material Alloy Steel ASTM A193: B7, B7M ASTM A194 2H, 2HM 1/2" - 4" ASTM A193: B16 ASTM A194 7L 1/2" - 4" ASTM A320: L7, L7M, L43 ASTM A194 7L, 7ML 1/2" - 2 1/2" Stainless Steel ASTM A193: B8, B8M, B8T, B8MLN, B8CLNCuB, B8MLCuN, B8ML4CuN (Class 1, 1A, 1B, 1C, 1D, 2, 2B, 2C) ASTM A194 8, 8A, 8M, 8MA, 8T, 8MLN, 8CLNCuB, 8MLCuN, 8ML4CuN 1/2" - 4" ASTM A320 : B8, B8M, B8T, B8MLN (Class 1, 1A, 2) ASTM A194 8, 8A, ...

Originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications. The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature or high pressure service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are spe...