NM450 vs NM400

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    The differences between NM400 and NM450 steel plates lie mainly in their levels of hardness and resistance to abrasion. NM400 is a non-metallic composite steel plate that has a tensile strength of at least 400 MPa, or 58,000 PSI. It has excellent abrasion and impact resistance, making it suitable for various applications that require wear resistance and durability. On the other hand, NM450 steel plate has a tensile strength of at least 450 MPa, or 65,500 PSI. This makes it significantly harder than NM400, and therefore less likely to buckle or deform under heavy loads and impacts.
    
    NM400 is commonly used in the construction and engineering industries, particularly for manufacturing heavy-duty vehicles and machinery parts such as bulldozers, diggers, and even certain types of armor. Its superior abrasion and impact resistance makes it suitable for these uses. NM450 steel plate, while less common, is often used in the production of military-grade armor, due to its superior hardness and resistance to abrasion. Unlike NM400, the extra hardness makes it difficult to work with, which is why it’s only used in highly specialized instances.
    
    The differences between the two are also seen in the amount of deformity they can handle. Since NM450 is harder, it tends to be less deformable than NM400, making it less prone to damage when handled improperly. Another major difference between these two steel plates is their amounts of chromium, which is the element that gives them their corrosion resistance. NM450 contains twice as much chromium as NM400, making it better suited for use in wet conditions where corrosion could occur.
    
    In terms of their welding ability, NM400 and NM450 have similar capabilities, though NM450 may be slightly harder to weld due its hard exterior. Both steel plates can also be cut with a plasma cutter, though NM450 may require more passes due to its increased hardness.
    
    Overall, NM400 is the more suitable choice for applications that require superior abrasion and impact resistance, while NM450 is better suited for those that need maximum hardness and resistance to corrosion. Both steel plates can provide a long service life, and depending on the application, either may be the better choice.