Material datasheet · Cold-work tool steel
AISI D2 High-Cr Cold-Work Tool Steel
UNS T30402 · Annealed for machining; air harden
High-chromium cold-work for max wear. 12% Cr forms hard carbides.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Fe | Bal. |
| C | 1.40–1.60 |
| Cr | 11.0–13.0 |
| Mo | 0.70–1.20 |
| V | 1.10 max |
Applicable specifications
AMS / ASTM / MIL.
- ASTM A681
- DIN 1.2379
Air harden 1850°F, double temper 400°F.
Machining guidance
CNC parameters and tooling.
Coated carbide; rigid setup
12% Cr forms hard carbides — wear-resistant but brittle. Grind or EDM after HT.
Stock & cost
Forms and Q1 2026 pricing.
- Black oxide
- Nitride
- PVD (TiN, TiAlN)
- Chrome plate
Typical applications
Where D2 Tool Steel is the right pick.
- Blanking dies
- Long-run punches
- Knife blades
- Abrasive tooling
Alternative materials
Substitute or upgrade options.
- A2 (tougher, lower wear)
- M2 (hot wear)
- CPM-10V (premium powder)
True Precision Machining · Buellton, CA
Machine your part in D2 Tool Steel.
5-axis CNC · ISO 9001 · AS9100 · ITAR · CMMC-compliant · DFARS-compliant supply chain. AS9102 FAI on aerospace.
Technically reviewed by the True Precision Machining engineering team · Last reviewed June 2026
Standards referenced: ASTM A681, DIN 1.2379
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