... .Standard:ASTM,ASME,DIN,GB 2.Material:ZG45Cr25Ni35Nb+Microalloy,HP-Nb+MA,G1.4852 3.ISO9001:2008 S+C G1.4852 ... Catalyst Tubes GradeC Si MnCr Ni Nb PSOtherZG45Ni35Cr25Nb+Microalloy0.40-0.50<=1.5<=1.023.0 ... .Standard:ASME,ANSI,ASTM,DIN,GB2.Material: ZG45Cr25Ni35Nb+Microalloy,HP-Nb+MA,G1.4852,H39WM3.Size:Length=16000mm,Width=1100mm,Heigth ...