Carbon Steel ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C Alloy Steel ASTM / ASME A 335 GR P 1, P 5, P 9, P 11, P 12, P 22, P 23, P 91 ASTM / ASME A 691 GR 1 CR, 1 1/ 4 CR, 2 1/ 4 CR, 5 CR, 9CR, 91
