Rockhard 400/450/500 is a type of Abrasion Resistant (AR) steel plate, engineered to deliver superior wear resistance, strength, and toughness for heavy-duty applications exposed to extreme wear and impact. Key Characteristics: Hardness: Rockhard 400: 360–440 Brinell Hardness Number (BHN) Rockhard 450: 420–480 BHN Rockhard 500: 470–530 BHN Abrasion Resistance: Exceptional wear resistance under harsh working conditions, ideal for high-friction environments. Strength: High tensile strength, offering durability and long service life. Weldability: Weldable with proper procedures; preheating and post-weld heat treatment may be required to avoid cracking and maintain mechanical properties. Chemical Composition: Rockhard AR steel plates typically contain: Carbon (C) Manganese (Mn) Chromium (Cr) Nickel (Ni) Boron (B) Other alloying elements depending on the grade Applications: Earthmoving and mining equipment Construction machinery and attachments Agricultural tools and components Truck beds, dump bodies, and liners Industrial wear parts (e.g., crushers, screens) Silos, hoppers, and chutes Benefits: Extended equipment life Lower downtime and maintenance costs High performance in abrasive conditions Consistent hardness and toughness across the plate Manufacturing: Rockhard steel plates are manufactured using a quenching and tempering process, ensuring a tough core with a hard, wear-resistant surface for optimal performance. Dimensions and Thickness: Available in a wide range of thicknesses and dimensions tailored to customer specifications and application needs.