NM 400 / 450 / 500 are abrasion-resistant (AR) steel plates developed in China, widely recognized for their excellent wear resistance and structural performance. These plates are suitable for industries where high-strength materials are essential to combat severe wear and impact, especially in mining, construction, and heavy machinery applications. Key Characteristics: Hardness Range: NM 400: 360–440 Brinell Hardness Number (BHN) NM 450: 420–480 BHN NM 500: 470–530 BHN Wear Resistance: Engineered to perform in highly abrasive environments, significantly reducing material loss and surface degradation. High Strength: Strong mechanical properties provide excellent impact resistance and structural durability under heavy loads. Good Workability: Despite high hardness, NM plates offer decent machinability, bendability, and weldability with proper procedures. Chemical Composition: Typical alloying elements used in NM series plates include: Carbon (C) Manganese (Mn) Silicon (Si) Chromium (Cr) Nickel (Ni) Boron (B) Additional trace elements to enhance performance and stability Applications: Mining equipment (e.g., dump truck bodies, liners, buckets) Earthmoving machinery Cement and aggregate processing equipment Agricultural and forestry machines Chutes, conveyors, hoppers, and wear parts Recycling and crushing equipment Benefits: Long service life under abrasive and high-impact conditions Reduced maintenance frequency and cost Lighter and stronger components for efficient operation Available in multiple hardness levels for tailored applications Production Process: NM plates are manufactured using a quenching and tempering process, ensuring a tough core and a hard, wear-resistant surface for maximum longevity in extreme environments. Sizes and Availability: NM plates are supplied in a variety of standard and custom dimensions to meet specific industrial requirements. Common thicknesses range from 3 mm to 80 mm or more, depending on grade and supplier.