Group

Heat-treated steel plates are high-strength, alloy steel plates that have undergone controlled heating and cooling processes to achieve specific mechanical properties unattainable in their as-rolled condition. The primary treatments are quenching and tempering (Q&T). The steel is first heated to an austenitizing temperature (typically above 900°C), then rapidly cooled (quenched) in water or oil to form a very hard, brittle martensitic structure. This is followed by tempering, where the plate is reheated to a lower temperature (between 400°C and 700°C) and held, then cooled. This critical second step relieves internal stresses, restores toughness and ductility, and produces a final microstructure that delivers an optimal balance of high strength, good impact resistance, and weldability. The specific combination of alloying elements (like chromium, molybdenum, nickel, and boron) and the precise tempering parameters determine the final yield strength, which is graded accordingly (e.g., A514, A517, AR400).

These plates are engineered for the most demanding structural and wear-resistant applications. High-strength Q&T plates (like AR500 or Hardox) are the standard for mining and construction equipment, used in dump truck bodies, excavator buckets, and bulldozer blades where extreme abrasion resistance is critical. In heavy machinery and lifting, they form the backbone of crane booms and forklift masts. For structural and defense applications, grades like A514/517 are used in building frameworks, bridges, and armored vehicles where maximum strength-to-weight ratio is vital. While offering exceptional performance, heat-treated plates require specialized welding procedures with pre-heat and post-weld heat treatment to maintain their properties in the heat-affected zone. Their ability to withstand immense stress, impact, and wear makes them an indispensable material for industries that operate at the limits of mechanical performance.