... .outer diameter:18-406mm 3.material:20#,45#,12Cr1MoV Standard: GB,ASTM,DIN,JIS; Grade: 10#, 20#, 45#, 16Mn; Application: Structure Pipe ... rangeOutside diameter: 1/2"-24"Wall thickness: Sch10 to Sch160StandardANSI, ASTM, GB, DIN, API,JISMaterialASTM A106 /A53 Gr. A/B, API 5L ...