H11 is an air-hardening hot work tool steel developed for applications where high toughness and resistance to thermal fatigue are important.
Its balanced alloy composition makes it suitable for forging dies, extrusion tooling, punch dies, press tools and other high-temperature tooling applications.
Key Properties
Built For Toughness. Designed For Heat.
Category: Hot Work Tool Steel
| Property | Specification |
|---|---|
| Material | H11 |
| Steel Type | Hot Work Tool Steel |
| AISI / SAE | H11 |
| Material No. | 1.2343 |
| UNS | T20811 |
| JIS | SKD6 |
| European Grade | X37CrMoV5-1 |
| Hardness – Annealed | Typically ≤ 229 HB |
| Heat Treatment | Air Hardening & Tempering |
| Element | Composition |
|---|---|
| Carbon (C) | 0.33–0.41% |
| Silicon (Si) | 0.80–1.20% |
| Manganese (Mn) | 0.20–0.50% |
| Chromium (Cr) | 4.75–5.50% |
| Molybdenum (Mo) | 1.10–1.75% |
| Vanadium (V) | 0.30–0.60% |
| Phosphorus (P) | ≤ 0.030% |
| Sulphur (S) | ≤ 0.030% |
Where H11 Is Used
H11 is particularly suited to tooling exposed to high temperatures, thermal cycling and mechanical loading.
Die Casting
Forging
Extrusion
Industrial Tooling
H-13 is normally preheated and austenitized before air cooling, followed by tempering to achieve the required balance of hardness and toughness.
Controlled preheating helps reduce thermal stress before the final hardening temperature is reached.
The steel is heated to the appropriate austenitizing temperature and then air quenched.
Tempering is performed after hardening to develop the required combination of hardness, toughness and thermal stability.
Double tempering is commonly used for H13 tooling to improve stability and achieve consistent final properties.
Round Bars
Flats
Blocks
Custom Sizes
TSI Metals can provide customised material preparation using its bandsaw cutting capability.
Share your requirement with our team and get the right steel solution for your application.
