400 HB Steel

400 HB Steel

Among 400 HB steels, BW400 and NM400 offer clear advantages for heavy-duty wear environments:

BW400: superior sliding wear resistance and dimensional stability
NM400: excellent impact + sliding wear balance with good weldability

While AR400 is suitable for general wear applications, BW400 and NM400 remain the preferred choice in high-abrasion, mining, and industrial applications, ensuring long service life, reduced maintenance, and optimal performance.

Category: NM series

Description

400 HB steel is a widely used wear-resistant material in mining, construction, and heavy machinery industries. Popular grades include NM400, BW400, and AR400, each designed to balance abrasion resistance, toughness, and industrial applicability.

1. Overview of NM400, BW400, and AR400

Grade	Hardness (HB)	Key Characteristics	Applications
NM400	400 HB	High abrasion resistance with good toughness; ideal for impact + sliding wear	Crusher liners, hoppers, chutes, bucket liners
BW400	400 HB	Uniform hardness, excellent wear resistance, especially for heavy sliding wear; superior dimensional stability	Conveyor liners, mining equipment, large abrasion surfaces
AR400	400 HB	Quenched and tempered steel with balanced hardness and impact resistance	General wear plates, earthmoving machinery, construction equipment

2. Advantages of NM400 and BW400

NM400

Optimized alloy composition (C, Cr, Mn) for high abrasion and impact resistance.
Performs well in combined impact and sliding wear environments.
Good weldability allows fabrication into customized components.
Commonly used in mining crushers, grinding liners, and hoppers.

BW400

Uniform hardness throughout the plate thickness ensures longer service life.
Excellent sliding wear resistance, suitable for heavy-duty conveyor liners and chutes.
Superior dimensional stability, reducing deformation during fabrication or installation.
Performs well under continuous abrasive conditions where NM400 may experience slight surface wear over time.

3. Comparison Summary

AR400 is versatile but slightly less specialized in high-abrasion scenarios.
NM400 excels in combined impact and sliding wear, making it ideal for crushers and hoppers.
BW400 provides maximum sliding wear resistance and dimensional stability, making it superior for large-scale conveyor systems and heavy mining equipment.