Q235 galvanized welded steel pipe: (1)Standard:AISI,ASTM,JIS,GB,BS ( ... )Grade:Q235 (3)Technique:cold rolled (4)Type:steel pipe Quick Details Standard: AISI,ASTM,BS, JIS, GBGrade:Q235Thickness ... 25 days after the prepayment.Specificationshot rolled weldless steel pipe 1)10#,20#,45# 2)GB8162-1999,GB8163 ... )16Mn,12Cr1MoV,15CrMo,30CrMo,27SiMn,10CrMo910,ST45,ST52,J55,K55,N80,etc 2)Standard:GB8162-1999,GB8163- ...