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)
Digital Machine · Quick-Turn CNC · California
Machine your part in D2 Tool Steel.
Production CNC milling and turning. Confirm material, inspection and documentation requirements when requesting a quote.
Keep exploring
Related tools & references
Speeds, feeds, tooling, and chip strategy.
SFM, RPM, and feed rate for this material.
Compare alloys by strength, weight, temperature, and cost.
Estimate part weight from D2 Tool Steel stock.
Aerospace specs that call out this alloy.