1.2436 (D6) vs D7
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
1.2436 (D6)
Tool Steel
1.2436 is the tungsten-bearing D6 cold work steel: D3-class carbide volume with tungsten added for air hardening and superior dimensional stability. It is the European precision-gauge and die counterpart to the American D-family.
Standards: DIN 1.2436 · AISI D6 · JIS SKD2 · GB Cr12W (near)
D7
Tool Steel
D7 combines maximum carbon and chromium with about 4% vanadium, giving the highest abrasive wear resistance of any conventional cold work steel. It is the last step before cemented carbide.
Standards: AISI D7
Chemical composition compared (%)
| Element | 1.2436 (D6) | D7 |
|---|---|---|
| C | 2.00–2.30 | 2.15–2.50 |
| Si | 0.10–0.40 | 0.10–0.60 |
| Mn | 0.30–0.60 | 0.10–0.60 |
| Cr | 11.00–13.00 | 11.00–13.50 |
| W | 0.60–0.80 | — |
| Mo | — | 0.70–1.00 |
| V | — | 3.80–4.40 |
Properties compared
| Property | 1.2436 (D6) | D7 |
|---|---|---|
| Delivery condition | Annealed | Annealed |
| Hardness (hardened) | 58–62 HRC | 58–64 HRC |
| Density | 7.80 g/cm³ | 7.70 g/cm³ |
| Dimensional stability | Excellent (air hardening, W-bearing) | — |
| Wear resistance | — | Highest of the standard cold work steels |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 1.2436 (D6) · D7. Substitution decisions for certified parts stay with the design authority.