OEM No/Model: 1.2344
Performance Characteristics:
Air-cooled hardening hot work die steel. good toughness, thermal fatigue resistance and abrasion resistance, and high hardenability.
Applications:
hot extrusion moulds and mandrelsforging mould of die-casting hammer; high-speed precision forging mould with inserts; die forging presses mould as well aluminum alloy die-casting mould, etc.
Chemical Composition(%)
Standard | Steel Grade | C | Si | Mn | P | S | Cr | Mo | V | other |
DIN | 1.2344 | 0.37-0.42 | 0.90-1.20 | 0.30-0.50 | 0.030 | 0.030 | 4.80-5.50 | 1.20-1.50 | 0.90-1.00 | |
ASTM | H13 | 0.32-0.45 | 0.80-1.20 | 0.20-0.50 | 0.030 | 0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 | |
GB | 4Cr5MoSiV1 | 0.32-0.45 | 0.80-1.20 | 0.20-0.50 | 0.030 | 0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 |
Process:
EAF+LF+VD+ESR+ Forged+ Annealed+Grinded/Machined
Annealed: 860-890°C, hardness 229HB
Quenching: 1020-1050°C, oil cooling or air cooling
Tempering: 560-580°C, hardness: 47-49HRC, twice tempering
Surface condition: black , grinded or machined/ turned.
Inspection: ultrasonic test, according to SEP1921 D/d or as your requirements.
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