... 4.Sell to Japan,Indonesia,America,Angola,Dubai,Germany Black Steel Pipe ASTM A106 Chemical Requirements(%)(≤)GradeCSiMnPSCrMoNiCuVA0.250.100.27-0.930 ... C: Tensile Strength Rm≥485MPa, Yield Strength σs≥275MPaSubject: Black Steel Pipe(1)Size: 1/2" to 60" / 21.3mm to ... )Certificate: ISO9001:2008, API 5L certificate, SGS certified factory, Hebei Famous Brand Enterprise(14)Delivery time: Fastest 15 days on ...