NM400 and AR400 are both types of wear-resistant steel, but they come from different standards and have specific properties tailored for various applications. Here's a detailed comparison:
Specifications:
Standard: Chinese GB/T 24186
Hardness: 360-440 HBW
Yield Strength: ≥ 800 MPa
Tensile Strength: ≥ 1250 MPa
Elongation: ≥ 10%
Impact Toughness: Good impact toughness, especially at lower temperatures
Applications:
Used in the manufacturing of mining machinery, construction machinery, and parts for industrial equipment.
Suitable for applications requiring resistance to abrasion and moderate impact.
Specifications:
Standard: ASTM (American Society for Testing and Materials)
Hardness: 360-440 HBW
Yield Strength: ≥ 1000 MPa
Tensile Strength: 1400 MPa
Elongation: 10-15%
Impact Toughness: Generally good, but can vary based on the specific manufacturer and batch.
Applications:
Commonly used in the manufacturing of conveyors, truck beds, chutes, and other equipment subjected to wear and tear.
Ideal for applications that require a balance between hardness and formability.
Standards:
NM400: Follows the Chinese GB/T 24186 standard.
AR400: Follows the ASTM standard commonly used in the United States.
Chemical Composition:
The exact chemical composition can vary between manufacturers, but generally, NM400 may have slightly different alloying elements compared to AR400, leading to variations in specific properties.
Mechanical Properties:
Yield Strength: AR400 typically has a higher yield strength compared to NM400.
Tensile Strength: AR400 usually has a higher tensile strength.
Hardness: Both steels have similar hardness levels, typically around 400 HBW.
Applications:
NM400: Often used in industries within China and other regions following Chinese standards, especially where a balance of hardness and toughness is required.
AR400: Widely used in North America and other regions following ASTM standards, particularly in applications requiring a tough, durable wear-resistant steel.
Both NM400 and AR400 are high-strength, wear-resistant steels with similar hardness levels, but they adhere to different standards and exhibit slight differences in mechanical properties. The choice between NM400 and AR400 depends largely on the specific requirements of the application and the regional standards being followed.
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