NM400 vs NM500 difference in composition & properties.
Carbon: NM500 ≤0.38% against NM400 ≤0.3%.
Key differences between NM400 and NM500
- Carbon: NM500 ≤0.38% against NM400 ≤0.3%.
NM400 vs NM500 chemical composition (weight %)
| Element | NM400 | NM500 |
|---|---|---|
| C | ≤0.3 | ≤0.38 |
| Si | ≤0.7 | ≤0.7 |
| Mn | ≤1.6 | ≤1.7 |
| P | ≤0.025 | ≤0.02 |
| S | ≤0.01 | ≤0.01 |
| Cr | ≤1.2 | ≤1.5 |
| Ni | ≤0.7 | ≤1 |
| Mo | ≤0.5 | ≤0.65 |
| Ti | ≤0.05 | ≤0.05 |
| B | 0.001–0.006 | 0.001–0.006 |
| Al | ≥0.01 | ≥0.01 |
Mechanical properties, equivalents and uses
| Property | NM400 | NM500 |
|---|---|---|
| Family | Abrasion-resistant steel plate | Abrasion-resistant steel plate |
| Tensile strength, MPa | ≥1200 | ≥1350 |
| Yield strength, MPa | – | – |
| Elongation, % | ≥10 | ≥7 |
| Hardness | 370–430 HBW | 470–540 HBW |
| Density, g/cm³ | 7.85 | 7.85 |
| EN | Hardox 400 (SSAB, nearest) | Hardox 500 (SSAB, nearest) |
| IS (India) | IS 18809 ISAR 400 (nearest) · AM/NS Rockstar 400 · JSPL Rockhard 400 | IS 18809 ISAR 500 (nearest) · AM/NS Rockstar 500 · JSPL Rockhard 500 |
| AISI / ASTM | AR400 (nearest) | AR500 (nearest) |
| Typical uses | Mostly used for tipper bodies, buckets, liners and chutes | Mostly used for crusher parts, cutting edges and high-wear liners |
Mechanical values: NM400 plate t ≤80 mm (surface; core 330–430) / NM500 plate t ≤70 mm (surface; core 420–540). Limits vary by standard and product form; confirm against your purchase specification.
Frequently asked questions
What is the difference between NM400 and NM500?
Carbon: NM500 ≤0.38% against NM400 ≤0.3%.
Where are NM400 and NM500 used?
NM400: Mostly used for tipper bodies, buckets, liners and chutes. NM500: Mostly used for crusher parts, cutting edges and high-wear liners.
Can NM500 replace NM400?
Only if the purchase specification allows it. Check the governing standard, chemistry limits and mechanical properties against the order, and confirm on the mill test certificate.
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Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.