... 4.Sell to Japan,Indonesia,America,Angola,Dubai,Germany Black Steel Pipe ASTM A106 Chemical Requirements(%)(≤)GradeCSiMnPSCrMoNiCuVA0.250.100.27-0. ... 240MPaGrade C: Tensile Strength Rm≥485MPa, Yield Strength σs≥275MPaSubject: Black Steel Pipe(1)Size: 1/2" to 60" / 21.3mm to ... C, ASTM A53A, B, ST37.2, ST.......(5)Type: Seamless carton steel for high temperature pipeline(6)Schedule: SCH10, SCH30, SCH40, ...