... :4000-13000mm 5. (S)A516 G A36 AND ST37 CARBON STEEL COILS AND PLATES WITH 1.1MM AND 1.4MM THICKNESS ... Q345qC (16Mnq), Q370qC, Q420qCBuilding Structural Steel Plate: GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCHigh Quality Carbon Steel Plate: 1>. ASTM 10252>. GB ... S48-50C, P20 / 2311, 718 / 2738, WSM30A, P80A, 638B Pipeline Steel Plate: Standard: Special ConditionGrade: API 5L-B, X52 (L360), X56 ...