... DescriptionMaterial:SteelColor:SilverShape:RectangleAPI Forged Parts made of AISI 4140 4130 8630 4340 8620 SPOOL Forged Steel Tee ... the overhaul need.Specifications:Material standard:GB, ASTM, AISI, ASME, DIN, BS, EN,Material:Carbon steel, stainless ... to customers' different requirements. (7). Main material are CK45, AISI 4140&4130, 5CrMnMo, 40Cr, 42CrMo, 20Cr2Ni4, 5CrNiMo, 15CrNiMo, 20CrNiMo, ...