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Abrasion Resistant Steel Plate

Abrasion resistant steel plates are commonly supplied in AR grades such as AR400, AR450, and AR500, while China mainly uses the NM series as an equivalent system.

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Abrasion Resistant Steel Plate

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Product Details

Abrasion resistant steel plate (AR steel plate) is a quenched and tempered wear-resistant steel designed to withstand abrasion, impact, and sliding wear in heavy industrial environments such as mining, construction, cement plants, and material handling systems.

Globally, AR steel is commonly identified by AR grades (AR400, AR450, AR500, etc.), while in China, the equivalent system is mainly the NM series (NM360, NM400, NM450, NM500, etc.).

1. Common Abrasion Resistant (AR) Steel Grades

The most widely used international AR steel grades include:

AR400 Steel Plate

Hardness: ~360–440 HBW
Balanced wear resistance and toughness
General industrial wear applications

AR450 Steel Plate

Hardness: ~430–480 HBW
Higher wear resistance than AR400
Used in heavy-duty equipment and liners

AR500 Steel Plate

Hardness: ~470–540 HBW
High abrasion resistance
Suitable for severe wear environments such as mining and crushing systems

Extended Grades (Less Common)

AR550 / AR600
Ultra-high hardness for extreme wear conditions
Used in special mining and impact applications

2. Chinese NM Series Wear Steel (Reference System)

China mainly uses the NM grading system:

NM360 ≈ AR400 equivalent (lower end)
NM400 ≈ AR400–AR450 range
NM450 ≈ AR450 equivalent
NM500 ≈ AR500 equivalent

NM series is widely used in domestic production and engineering applications.

3. AR Steel vs NM Steel – Key Differences

Aspect	AR Steel (International)	NM Steel (China Standard)
Naming system	AR400, AR450, AR500	NM360, NM400, NM450, NM500
Standard origin	ASTM / international market	Chinese GB / industry standard
Hardness definition	Based on HBW range (approx.)	Based on defined NM grade ranges
Market usage	Global export standard	Domestic China market standard
Equivalent relationship	Direct mapping with NM grades	Equivalent but not identical in certification

4. Performance Comparison

Both AR and NM steels share similar production methods:

Quenched and tempered process
Martensitic microstructure
High hardness + controlled toughness

However:

AR steel focuses more on international hardness classification consistency
NM steel is optimized for Chinese industrial application standards and cost efficiency

In practice, AR400 ≈ NM400 and AR500 ≈ NM500, but exact chemical composition and testing standards may vary slightly depending on manufacturer.