Steel Tube Standard: GB/T3639,8162,3087,ASTM A106,A192,BS3059,3601,3602,6323, DIN1629,1630, JIS G3454 Grade:1010, St12,040A10, Steel TubeWe ... ,1022,1026,1033,1037,1043,1046,1053,1060,1566,1572By DIN: St12,13,14,Ck10,Ck15,Ck22,Ck25,Ck30,Ck35,Ck40 ... 6-400mm Wall thickness 0.5-40mm4.Packing: exporting packing Steel Tube