H11 Tool Steel
H11 Steel is a hot-work tool steel that is widely used for manufacturing tools and dies that operate under high temperature and heavy mechanical stress. It belongs to the chromium-molybdenum alloy tool steel family and is known for its excellent toughness, good heat resistance, and strong resistance to thermal fatigue. H11 steel is designed to maintain its strength and hardness even when exposed to repeated heating and cooling cycles, which makes it very reliable for hot-working industrial processes.
H11 steel typically contains alloying elements such as carbon, chromium, molybdenum, and vanadium, which help improve its strength, wear resistance, and durability at high temperatures. After proper heat treatment, H11 steel can achieve a hardness of around 45–50 HRC, making it suitable for demanding applications. Because of its high toughness and resistance to cracking, H11 steel is commonly used to produce hot forging dies, die-casting molds, extrusion tools, punches, and high-temperature industrial tooling. It is widely used in industries such as automotive, aerospace, and heavy metal manufacturing, where strong and heat-resistant tooling materials are required.
Critical points
- Ac1 840 °C
- Ac3 880 °C
- Ms 260 °C
Production technology
- EAF – LF – VD – Forging – Heat treatment +EFS
US specification
- In according to standard EN10228-3 Class 4 and standard SEP 1921 Class E/e
Delivery condition
- WW.NR. 1.2343 is delivered in annealed condition (EFS), with hardness max 230 HB (21 HRC)
Comparable standards
| DIN | W.Nr | AFNOR | AISI/ASIM | JIS |
|---|---|---|---|---|
| X38CrMoV5-1 | 1.2343 | Z38CDV5 | H-11 | SKD6 |
Chemical composition (typical; in weight %)
| C | Si | Mn | P(Max) | S(Max) | Cr | Mo | V |
|---|---|---|---|---|---|---|---|
| 0.33-0.41 | 0.80-1.20 | 0.25-0.50 | 0.03 | 0.03 | 4.80-5.50 | 1.10-1.50 | 0.30-0.50 |
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