1.2436 | D6 | Cr12W
- AISI D6 tool steel is a high-carbon, 12% chromium alloy cold work tool steel with tungsten. D6 steel is an air hardening alloy tool steel with excellent resistance to wear and abrasion. As a high carbon high chromium tool steel D6 has better through hardening properties than D3 steel and dimensional stability combined with high resistance to tempering.
- It is characterized by low ductility and brittleness, excellent abrasion resistance and very high hardness. It is mainly used for tools for punching, cutting and stamping metal sheets, as well as for the production of haulers, cutters, reamers, gauges, drawing dies and disc knives. The addition of tungsten improves the hardenability of the grade, which results in the possibility of higher hardness.
Description
Chemical Composition
| Standard | Grade | C | Si | Mn | Cr | P | S | W |
| ASTM | D6 | 2.00-2.20 | 0.70-0.90 | 0.20-0.40 | 11.50-12.50 | ≤0.03 | ≤0.03 | 0.60-0.90 |
| DIN | 1.2436 | 2.00-2.35 | 0.10-0.40 | 0.15-0.45 | 11.00-12.00 | ≤0.03 | ≤0.03 | 0.60-0.80 |
| GB | Cr12W | 2.00-2.30 | ≤0.40 | ≤0.40 | 11.50-12.50 | ≤0.03 | ≤0.03 | 0.60-0.90 |
Supply Range
Surface Finish: Black, Peeled, Machined/Turned or as per given requirements.
Forged Round Bar: 20mm - 650mm (Dia)
Rolled Bars: 12mm - 360mm (Dia)
Forged flats: 30-400mm(T)*500-1200mm(W)
Rolled flats: 10-360mm(T)*30-1020mm(W)
Other sizes of O1 material or as per customer’s requirements
Heat Treatment
Forging
D6 tool steel is heated slowly and uniformly to 700°C (1292°F) and then more rapidly to 900-1050°C (1652-1922°F).
Annealing
D6 tool steel is then annealed at 800-840°C (1472-1544°F) and cooled. Hardness of the steel after annealing will be approximately 225 Brinell.
Stress Relieving
Stresses from D6 tool steel can be eliminated before hardening by heating up to 650-700°C (1202-1292°F), if machining operations have been heavy. The steel is then allowed to cool slowly.
Hardening
D6 steel is pre-heated slowly to 750-800°C (1382-1472°F) and thoroughly soaked. Heating is then continued till the final hardening of 950-980°C (1742-1796°F), followed by air or oil quenching.
Tempering
The steel is heated uniformly and thoroughly at the selected tempering temperature. Double tempering can also be carried out with intermediate cooling to room temperature.
Applications
Forming tools
Molds for abrasive plastics and ceramics
Long-run press tools
Blanking and shearing tools for hard materials
