AISI M42 Cobalt High-Speed Steel: Super HSS for Superalloys
ASTM A600 · Published: 2026-06-01 · Updated: 2026-06-02
A specialized tool steel grade for cutting, forming, or die applications. Proper heat treatment is critical to achieving optimal tool performance and life.
A specialized tool steel grade for cutting, forming, or die applications. Proper heat treatment is critical to achieving optimal tool performance and life.
Quick Facts
| Category | Tool Steel |
| Standard | ASTM A600 |
| Density | 8.00 g/cm³ |
| Yield Strength | 3,500 MPa (508 ksi) at 66-68 HRC |
| Tensile Strength | 3,800 MPa (551 ksi) at 66-68 HRC |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| EN HS2-9-1-8 | Compare |
| DIN 1.3247 | Compare |
| SKH59 | Compare |
| W2Mo9Cr4VCo8 | Compare |
Related Materials
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Frequently Asked Questions
What is the typical hardness range?
As specified in the mechanical properties. The exact hardness depends on the austenitizing temperature, quench method, and tempering cycle. Always follow the manufacturer's heat treatment recommendation for the specific tool application.
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