... honed tube 1 OD 26--540mm WT 1--55 2 API certification 3 FOB price 660/ton Main Products 310s seamless steel tube(tube ... Materials10#,20#(ASTMA106B),45#(ASTM1045),16Mn(st52),45Mn2(46Mn7),etcaccording to your requirementsStandardGB,JIS,ASTM,DIN,BSI ,etc Main Wall ... Outer Diameter 21mm-406.4mm(1/2'-16')according to your requirementsCertification ISO9001:2000GradeGB/T8162-1999,GB/T8163-1999, ...