... API,DIN,GOST 2.Grade:A53,A106,API 5L Gr.B 3.Size:1/2-20inch ASTM A53/ ... A106/API 5L Gr.b seamless steel pipe Product Introduction: 1. Kind: ... seamless pipe 2. Size: Diameter: 1/2 inch to 24 inch Thickness: 2mm-60mm 3. Steel Grade:A53 ( ... A,B),A106(A,B),API 5L Gr.B,X42,X52,X60,st42,st37,st52,SS400,SS490 ... 3inch 8. Chemical composition: C: 0.17-0.24 Mn:0.35-0.65 P:≤0.035 S:≤ ...