... Grade 10#,20#,45#,16Mn,27SiMn,12Cr1MoV,Q235, ST42,ST52,A106-a,A106-b, and so on Length 6-12m. As customers requestments ... 4. tubing 5. hot-rolled steel pipe 6. spiral steel pipe 7. hot-galvanized steel pipe SpecificationsChina StandardSteel GradeStandardseamless steel tubesand pipesfor ... 1Cr5Mo, JIS G3441-1988 1.Specification: API 5L GR.B SSAW steel pipe line pipe ,2.Size: from 219" to 2420", 3.Wall ...