Metals & alloys · Ferrous alloys
AISI H13 hot-work tool steel
A chromium–molybdenum–vanadium hot-work tool steel valued for hot hardness, toughness, temper resistance and resistance to thermal fatigue.
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01
Overview
- Material class
- Metals & alloys
- Category
- Ferrous alloys
- Family
- Tool Steel
- Product forms
- Sheet/plate, Bar/rod
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| C | 0.32 | 0.45 | 0.39 | |
| Si | 0.8 | 1.2 | 1 | |
| Mn | 0.2 | 0.5 | 0.4 | |
| Cr | 4.75 | 5.5 | 5.2 | |
| Mo | 1.1 | 1.75 | 1.4 | |
| V | 0.8 | 1.2 | 0.9 | |
| Fe | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 7.8 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 210 | GPa | Representative; verify product form and condition |
| Thermal conductivity | 24–29 | W/m·K | temperature and condition dependent |
| Working hardness | 44–52 | HRC | application dependent |
| Austenitizing temperature | 1000–1040 | °C | typical range |
| Tempering temperature | 540–650 | °C | multiple tempers commonly used |
Conditions
Hardened and tempered
Hot-work service condition; tempering schedule must be stated.
Soft annealed
Machining precursor condition.
03
Processing and use
Processing
- Preheat, staged heating and controlled cooling reduce cracking risk.
- Double or triple tempering is commonly used to stabilize hardness and toughness.
Applications
- Die-casting dies
- Hot forging dies
- Extrusion tooling
- Hot shear blades
Selection considerations
- Cleanliness and isotropy are critical for large or highly stressed dies.
- Thermal management and surface treatment can dominate service life.
Open in an analysis tool
04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| AISI | H13 | |
| UNS | T20813 | |
| EN | 1.2344 / X40CrMoV5-1 | |
| ASTM | A681 |
Other names
- AISI H13
05
Sources and context
Sources
- Uddeholm AISI H13 product pageExisting reference
- Uddeholm heat-treatment guideExisting reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Available in conventional, ESR and premium remelted quality levels.
Tool life extension through repair welding, re-polishing and surface engineering can materially reduce replacement demand.
Strategic context
Established engineering material with documented processing–performance relationships.