ASTM A53/A106/API 5L Gr.b seamless steel pipe 1.Standard:ASTM,API ... ,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 ... 60mm 3. Steel Grade:A53 (A,B),A106(A,B),API 5L Gr.B,X42,X52,X60,st42,st37,st52,SS400 ... small size,hot rolled for size up 3inch 8. Chemical composition: C: 0.17-0.24 Mn:0.35- ...