... 4.Sell to Japan,Indonesia,America,Angola,Dubai,Germany Black Steel Pipe ASTM A106 Chemical Requirements(%)(≤)GradeCSiMnPSCrMoNiCuVA0.250.100.27-0. ... C: Tensile Strength Rm≥485MPa, Yield Strength σs≥275MPaSubject: Black Steel Pipe(1)Size: 1/2" to 60" / 21.3mm to ... )Pipe end: Plain end, or as per customers' special request(9)Finishing: Varnished with anti-rust paint, oil, galvanization(10)Manufacturing ...