High-carbon, high-chromium cold-work tool steel stocked for long-run blanking, cutting and forming dies.
D2 is a high-carbon, high-chromium cold-work steel — one of the most widely used die steels for the simple reason that it holds an edge and resists wear far longer than a plain carbon tool steel, without the cost of a fully alloyed high-speed steel.
Its high chromium content also gives it a semi-stainless quality and, importantly, good dimensional stability through hardening — a die maker can harden a D2 punch or die and expect it to come out close to size, which matters on precision blanking tools. It's supplied to us annealed so toolmakers can machine it before hardening it to their required 58–62 HRC.
We keep D2 in working stock for jobbing and toolroom orders that need it in smaller quantities than our bulk-imported grades.
| Grade Designation | D2 / 1.2379 |
| DIN Equivalent | 1.2379 |
| AISI Equivalent | D2 |
| Typical Hardness | Annealed: ~250 HB · Hardened: 58–62 HRC |
| Delivery Condition | Annealed (soft) |
| Heat Treatment Info | Harden 1000–1030°C, air quench; temper 180–500°C depending on target hardness |
| Density | 7.70 g/cm³ |
| Chemical Composition (approx. wt%) | C 1.40–1.60, Si ≤0.60, Mn ≤0.60, Cr 11.0–13.0, Mo 0.70–1.20, V 0.70–1.00 |
Values are typical for the standard, not a mill certificate. Actual test-certificate figures accompany each imported lot.
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