DIN 1.2344 steel belongs to hot working tool steel as per DIN 17350 standard.
DIN 1.2344 steel retains its strength and hardness at temperatures up to 600°C, making it very suitable for high temperature environments.
In addition, DIN 1.2344 steel has excellent machining and polishing properties, which is very beneficial for mold manufacturing.
DIN 1.2344 steel is usually supplied in pre-hardened or annealed condition.

DIN 1.2344 STEEL CHEMICAL COMPOSITION
Grade | C | Si | Mn | P | S | Cr | Mo | V |
1.2344 | 0.37-0.43 | 0.9-1.2 | 0.3-0.5 | ≤0.03 | ≤0.03 | 4.8-5.5 | 1.2-1.5 | 0.9-1.1 |
DIN 1.2344 STEEL RELATED STANDARD & EQUIVALENT GRADE
China/GB 1299: 4Cr5MoSiV1
USA/ASTM A681:H13
Japan/JIS G4404: SKD61
DIN 1.2344 STEEL FORGING
- Initial Forging Temperature:1050-1100℃
- Final Forging Temperature:900-950℃
- Forging Ratio:above 4:1
- Post-Forging Treatment:For 1.2344 steel, annealing immediately after forging is most suitable.
DIN 1.2344 STEEL HEAT TREATMENT
Critical Temperature for Heat Treatment of 1.2344 Steel
- Ac1:860℃
- Ac3:915℃
- Ar1:775℃
- Ar3:815℃
- Ms:315℃
Temperature Selection for Different Types of Heat treatment for 1.2344 steel
- Normalizing:920-940℃,Cool in air.
- Annealing:860-890℃,Cool in furnace,hardness below 229HBW
- Stress Relief Annealing:730-760℃,furnace cooling.
- Quenching: 1020-1060℃,Oil/Air quench,quenching hardness:53-55HRC.
- Tempering:560-580°C, double tempering process with hardness 47-51HRC.
DIN 1.2344 Steel Tempering vs Hardness Diagram
DIN 1.2344/X40CrMoV5-1 STEEL SUPPLY FORM & SIZE & TOLERANCE
Hot Forged Round bar:Φ80-Φ1000mm
Hot Rolled Round bar:Φ16-Φ130mm
Hot Forged Square bar: Max Thickness:500mm
Flat bar/Blcoks:Thickness :120-800mm ,Width:120-1500mm
Surface Finish | Black-Forged | Black-Rolled | Turned | Grinding | Polished | Peeled | Cold Drawn |
Tolerance | (0,+5mm) | (0,+1mm) | (0,+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |