Material datasheet · Hot-work tool steel
AISI H13 Hot-Work Tool Steel
UNS T20813 · Annealed for machining; hardened, double tempered to 44-50 HRC
Hot-work standard. Holds 44 HRC at 540°C continuous service.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Fe | Bal. |
| C | 0.32–0.45 |
| Cr | 4.75–5.50 |
| Mo | 1.10–1.75 |
| V | 0.80–1.20 |
Applicable specifications
AMS / ASTM / MIL.
- ASTM A681
- AMS 6408
- NADCA #207
Austenitize 1850°F, air or oil quench, double temper 1050°F.
Machining guidance
CNC parameters and tooling.
Coated carbide
Holds 44 HRC at 1000°F. Standard for aluminum die casting and hot forging dies.
Stock & cost
Forms and Q1 2026 pricing.
- Nitride (key for die life)
- PVD coatings
- Polish for plastic mold cavities
Typical applications
Where H13 Tool Steel is the right pick.
- Aluminum die casting dies
- Hot forging dies
- Plastic injection molds
- Extrusion tooling
Alternative materials
Substitute or upgrade options.
- H11 (lower carbon, tougher)
- S7 (impact)
- Premium DIEVAR / QRO 90
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