T: +86-0731-85185770
E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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NM500
Qilu
NM500 steel is premium quenched and tempered wear‑resistant steel plate specified under Chinese national standard GB/T 24186‑2022. “NM” stands for abrasion resistance; the number “500” refers to its nominal Brinell hardness around 500 HBW, with actual hardness ranging 470‑540 HBW. Manufactured by quenching plus tempering heat treatment, NM500 forms uniform tempered martensite microstructure to combine high surface hardness and acceptable impact toughness. Its abrasion service life is 3‑5 times longer than ordinary carbon steel. It works as a cost‑effective alternative to imported wear steel such as Hardox 500, AR500 and XAR500 for heavy abrasive‑wear conditions. Delivered in Q+T (quenched & tempered) condition. Available with shot‑blasting, anti‑rust painting, CNC cutting, bending and pre‑fabrication service.
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Als |
| NM500 | 0.38 Max | 0.70 Max | 1.70 Max | 0.020 Max | 0.010 Max | 1.50 Max | 1.00 Max | 0.65 Max | 0.050 Max | 0.0005-0.0060 | 0.010 Min |
| Property | Value |
| Brinell Hardness | 470‑540HBW |
| Yield Strength | ≥1000 MPa |
| Tensile Strength | ≥1300 MPa |
| Elongation | ≥ 8% |
| Charpy Impact Akv (-20℃) | ≥15 J |
Thickness: 3‑100 mm, popular gauges: 6,8,10,12,16,20,25,30,40,50,60 mm
Width: 1500‑4000 mm
Length: 3000‑18000 mm, custom cut‑to‑length available
Surface finish: Shot‑blasted raw surface, anti‑rust painted
Value‑added service: Plasma / laser cutting, bending, drilling, semi‑finished parts, mill test certificate provided for each batch.
Pre‑heat to 150‑250℃ for flame cutting to reduce edge hardening and cracking risk.
Welding requires pre‑heating 200‑300℃, low‑hydrogen consumables and post‑weld slow cooling. Do not weld at ambient temperature directly.
For cold bending, bending radius shall be at least 6‑8 times plate thickness. Hot bending recommended for thick plates.
Long‑term working temperature better kept below 200℃; higher temperature will cause hardness drop and weaken wear resistance.
NM500 steel plate is extensively used across heavy industries where equipment longevity is critical.
Dumper truck bodies & liners
Excavator buckets, shovel blades, and teeth
Chutes, hoppers, and crusher screens
Bulldozer blades and cutting edges
Concrete mixer drums
Loader buckets
Coal handling chutes and feeder liners
Separator guide vanes
Fan blades and classifier cones
Sintering plant chutes
Blast furnace bells and hoppers
Ore conveyors
Dredging pumps and pipelines
Ship hull reinforcements and propeller components
The main difference between NM400, NM450, and NM500 is their nominal hardness level and corresponding wear resistance.
| Grade | Nominal Hardness | Typical Use |
| NM400 | 400 HBW | General wear applications |
| NM450 | 450 HBW | Moderate to heavy abrasion |
| NM500 | 500 HBW | Severe abrasion and heavy-duty service |
NM500 generally provides higher abrasion resistance than NM400 and NM450, but higher hardness may also require greater attention to cutting, forming, welding, and fabrication procedures. The appropriate grade should therefore be selected according to the actual working conditions.
A1: NM500 generally offers higher hardness and wear resistance than NM400. However, NM400 may be easier to fabricate and can be more economical for applications with lower wear intensity.
A2: NM500 is commonly used in mining, construction, quarrying, cement, coal handling, transportation, and heavy equipment industries.
A3: Yes. NM500 can be welded when appropriate welding procedures are followed. Preheating, interpass temperature, heat input, and suitable welding consumables should be selected according to material thickness and welding conditions.
A4: Yes. NM500 can be processed by suitable thermal or mechanical cutting methods. Cutting parameters should be adjusted for its high hardness to achieve good edge quality.
A5: NM500 typically has a nominal Brinell hardness of around 500 HBW, although the actual certified hardness depends on the applicable standard, thickness, and production requirements.
If you are looking for NM500 wear resistant steel plate supplier, or high hardness wear plate, contact Qilu Steel for material specifications, available sizes, pricing, and technical support.
