Ni-Hard 4: Abrasion-Resistant White Cast Iron for Mining Processing
ASTM A532 Class I Type D · Published: 2026-06-02 · Updated: 2026-06-02
Ni-Hard 4 achieves 550-650 HB through M7C3 chromium carbides in martensitic matrix. Harder than most minerals processed in mining. For slurry pump impellers, mill liners, chute liners, ash handling elbows. Machinable only by grinding. Max service 250°C.
Ni-Hard 4 achieves 550-650 HB through M7C3 chromium carbides in martensitic matrix. Harder than most minerals processed in mining. For slurry pump impellers, mill liners, chute liners, ash handling elbows. Machinable only by grinding. Max service 250°C.
Quick Facts
| Category | Cast Iron |
| Standard | ASTM A532 Class I Type D |
| Density | 7700 kg/m³ |
| Yield Strength | N/A (brittle) |
| Tensile Strength | 600-800 MPa |
Global Equivalents & Cross-Reference
Related Materials
🧮 Material Weight Calculator
Calculate the weight based on this material's density: 7700 kg/m³
Frequently Asked Questions
Ni-Hard 4 vs 25% Cr white iron?
Ni-Hard 4: higher hardness (550-650 vs 450-550 HB), better dry abrasion wear. 25% Cr: better corrosion resistance, better toughness. For wet corrosion-abrasion, 25% Cr preferred.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu