... 5L-B, X52 (L360), X56 (L390), X60 (L420), X65, X70Quenching and Tempering High Tensile Steel Plate: Standard: Special ConditionGrade: WH70Q, WQ590D, Q550DThe ... facilities for hot-rolled, controlled rolling, normalizing, annealing, tempering, quenching, normalizing plus tempering, quenching and tempering, and other delivery states are available. Tests: HIC, SSC ...