NM 400 / 450 / 500 (Economical and Durable Wear-Resistant Steel from China) NM (Na Mosi) plates are widely adopted abrasion-resistant steel grades manufactured in China. They are a cost-effective solution for industries requiring moderate to high resistance to wear, impact, and mechanical stress. These plates combine high hardness with reasonable toughness and weldability, making them suitable for a wide variety of uses where both performance and budget considerations are important. Hardness Levels: NM 400: 360–440 BHN NM 450: 420–480 BHN NM 500: 470–530 BHN Key Features: Strong resistance to sliding and impact abrasion Reasonably good weldability – compatible with MIG/TIG welding with preheat Wide availability and affordability Suitable for moderate to heavy wear applications Common Applications: Construction and mining machinery Dump truck bodies and liners Hoppers, feeders, silos, and agricultural wear parts Quarry and cement industry equipment