... ,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: carbon ... Thickness: 2mm-60mm 3. Steel Grade:A53 (A,B),A106(A,B),API 5L Gr.B,X42,X52,X60,st42,st37,st52,SS400,SS490 ... specification we adopt. 7. Technique:Cold drawn for small size,hot rolled for size up 3inch 8. Chemical composition: C: ...