What is the difference between NM400 and NM 500

    
    NM is a range of wear-resistant steel produced by SSAB. NM steel is known for its toughness, strength, and abrasion resistance. The NM range includes two different grades of steel, NM 400 and NM 500.
    
    NM 400 is a wear-resistant steel with a nominal hardness of 400 HBW and is ideal for lightweight applications that require a high level of abrasion resistance. It has excellent cold forming characteristics, making it an ideal choice for structures that need to be reshaped or subjected to frequent wear. This grade of steel is relatively soft but has good shock resistance, making it a good choice for construction, truck beds, trailer bodies, components of tractors, and other industrial and farming equipment.
    
    NM 500 is a wear-resistant steel with a nominal hardness of 500 HBW and is intended for heavy-duty applications. This grade of steel is much harder than NM 400 and is highly resistant to wear and tear. NM 500 is often used for applications such as shovels, crushers, and large-scale industrial machinery. It is more suitable for use in high-impact areas due to its hardness, making it ideal for applications requiring high levels of shock resistance.
    
    Overall, NM 400 is ideal for applications requiring a high level of abrasion resistance and is better for reshaping objects, while NM 500 is best for wear and tear in heavy-duty applications.