1. Chemical Composition
NM450 is a high-strength wear-resistant steel with the following typical composition ranges (by weight %) :
| Element | Content (%) | Notes |
|---|---|---|
| C | 0.16–0.35 | Enhances hardness and wear resistance. |
| Si | 0.15–0.80 | Improves strength and oxidation resistance. |
| Mn | 1.20–1.70 | Increases hardenability and toughness. |
| P | ≤0.025 | Controlled to avoid brittleness. |
| S | ≤0.010 | Minimized for better weldability. |
| Cr | ≤1.50 | Boosts corrosion and wear resistance. |
| Mo | ≤0.55 | Enhances high-temperature strength. |
| Ni | ≤0.80 | Improves toughness and impact resistance. |
| B | 0.0005–0.006 | Increases hardenability. |
Key Notes:
Alloy flexibility: Cr, Ni, Mo can be adjusted or combined for specific performance needs .
Impurities: Cu ≤0.30%, As ≤0.08% (residual elements) .
NM450 exhibits exceptional hardness and strength for abrasive environments :
| Property | Value | Remarks |
|---|---|---|
| Hardness (HBW) | 420–480 | Surface hardness (thickness ≤80mm) . |
| Yield Strength (MPa) | ≥930–1100 | Depends on heat treatment . |
| Tensile Strength (MPa) | ≥1250–1700 | High load-bearing capacity . |
| Elongation (%) | ≥7–12 | Balances ductility and strength . |
| Impact Toughness (J, -20°C) | ≥24–27 | Ensures performance in cold climates . |
Key Notes:
Heat Treatment: Typically delivered in quenched + tempered (Q&T) state for optimal hardness-toughness balance .
Applications: Ideal for mining equipment (crusher liners, excavator buckets), construction machinery, and heavy-duty transport .
China: GB/T 24186-2022 .
Comparable Int’l Grades: JFE’s NK-EH450, DILLDUR 450V .
For project-specific requirements (e.g., welding/cutting guidelines), consult manufacturer datasheets
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
