Chinese Wear-resistant Steel

Low-hardness Wear-resistant Steel
NM300
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NM300D
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NM300E
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Medium-hardness Wear-resistant Steel
NM400
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NM400D
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NM400E
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NM450
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NM450D
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NM450E
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High-hardness Wear-resistant Steel
NM500
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NM500D
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NM500E
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NM550
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NM550D
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NM550E
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NM600
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NM600D
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NM600E
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FAQ
What is the difference between low, medium and high hardness wear resistant steel?
Low hardness (300–360 HBW): Better bending and welding performance

Medium hardness (400–450 HBW): Balanced wear resistance and toughness

High hardness (500–600 HBW): Maximum abrasion resistance and longer service life
What do the suffixes D and E mean in NM300D, NM300E or NM500D?
Suffix D and E indicate low-temperature impact toughness, not hardness level.

D: Impact tested at −20°C

E: Impact tested at −40°C

The hardness remains within the same grade range.
Can NM wear resistant steel plates be welded and formed?
Yes. Lower hardness grades such as NM300 and NM360 offer better formability. For higher hardness grades, controlled welding procedures and preheating are recommended to avoid cracking.
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