NM600 vs NM500
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
NM600
Wear-Resistant Plate
NM600 is the hardest grade in the GB/T 24186 family (570 HBW and up): maximum resistance to sliding abrasion for flat wear parts, with minimal toughness reserve. If a part must bend, absorb impact or be welded extensively, this is the wrong grade.
Standards: DIN — (cf. XAR600 class) · AISI AR600 class · GB NM600 (GB/T 24186)
NM500
Wear-Resistant Plate
NM500 is the 500 HBW abrasion-resistant plate for severe wear: roughly double the service life of NM400 in sliding abrasion, at higher forming and welding demands.
Standards: DIN — (cf. XAR500 class) · AISI AR500 class · GB NM500 (GB/T 24186)
Chemical composition compared (%)
| Element | NM600 | NM500 |
|---|---|---|
| C | ≤0.40 | ≤0.30 (typ.) |
| Si | ≤0.70 | ≤0.70 |
| Mn | ≤1.60 | ≤1.60 |
| P | ≤0.025 | ≤0.025 |
| S | ≤0.010 | ≤0.010 |
| Cr | ≤1.50 | ≤1.50 |
| Ni | ≤1.00 | ≤1.00 (typ.) |
| Mo | ≤0.70 | ≤0.65 |
| B | ≤0.004 | ≤0.004 |
Properties compared
| Property | NM600 | NM500 |
|---|---|---|
| Hardness | ≥570 HBW | 470–540 HBW |
| Tensile strength | ≥1600 MPa (typ.) | ≥1450 MPa (typ.) |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: NM600 · NM500. Substitution decisions for certified parts stay with the design authority.