... 2.Material:ZG45Cr25Ni35Nb+Microalloy,HP-Nb+MA,G1.4852 3.ISO9001:2008 S+C G1.4852 Catalyst Tubes GradeC Si MnCr Ni ... ,ANSI,ASTM,DIN,GB2.Material: ZG45Cr25Ni35Nb+Microalloy,HP-Nb+MA,G1.4852,H39WM3.Size:Length=16000mm,Width=1100mm,Heigth=1100mm or ... of growth is essential for safe plant operation. S+C G1.4852 catalyst tubes