
Hot Work Tool Steel
Suitable for high-temperature applications such as die casting, hot extrusion and hot forging.
Product Overview
Hot work tool steel is designed for high-temperature die applications such as hot extrusion, die casting and hot forging. It offers good hot strength, resistance to thermal fatigue and toughness, ensuring stable performance under repeated heating and cooling cycles.
Typical Use Cases
- Die-Casting Dies
- Hot Extrusion Dies
- Hot Forging Dies
- Aluminium Alloy Dies

Steel Grade Comparison
Common equivalent grades reference for material selection communication across different standards.
| EN | AISI | DIN | JIS | GB | APPLICATION |
|---|---|---|---|---|---|
| X40CrMoV5-1 | H13 | 1.2344 | SKD61 | 4Cr5MoSiV1 | For aluminum die-casting dies, extrusion dies and thin-wall plastic moulds |
| X38CrMoV5-1 | H11 | 1.2343 | SKD6 | 4Cr5MoSiV | For aluminum die-casting dies, extrusion dies and thin-wall plastic moulds |
| X38CrMoV5-3 | H13 Mod | 1.2367 | - | 4Cr5Mo2SiV | For aluminum, magnesium and titanium extrusion dies and die-casting dies |
| 32CrMoV12-28 | H10 Mod | 1.2365 | SKD7 | 3Cr3Mo3V | For copper extrusion dies with good thermal stability |
| - | H12 | 1.2602 | SKD62 | 3Cr5WMoSiV | For mechanical forging dies and ejector pins, etc. |
| - | H12 Mod | - | - | 5Cr5WMoSiV | For cold rolling rolls, intermediate rolls, backup rolls and hot shear blades, etc. |
| - | H21 Mod | - | - | 4Cr3W2Mo2V | For forging dies with good wear resistance |
| 56NiCrMoV7 | L6 | 1.2714 | SKT4 | 5CrNiMoV | For medium-to-large forging dies |
| X30WCrV9-3 | H21 | 1.2581 | SKD5 | 3Cr2W8V | For hot work tools and forging dies requiring high heat resistance and resistance to thermal cycling |
| 55NiCrMoV6 | - | 1.2713 | SKT4 | 5CrNiMo | For medium-to-large forging dies |
Grade equivalencies are for general reference only; actual supply standards apply. A "-" in the table indicates no corresponding grade is currently available.