SKD11 vs DC53
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.
SKD11
Tool Steel
SKD11 is the JIS cold work tool steel equivalent to AISI D2 and DIN 1.2379 — the Asian-market designation buyers meet on Japanese and Korean mill certificates.
Standards: DIN 1.2379 · AISI D2 · JIS SKD11 · GB Cr12Mo1V1
DC53
Tool Steel
DC53 is Daido’s improved cold work steel: a rebalanced D2-type chemistry (less carbon and chromium, more molybdenum) that reaches 60–64 HRC with roughly double the toughness of D2 and excellent high-temperature tempering response.
Standards: DIN — (modified 1.2379 type) · AISI — (modified D2 type) · JIS — (Daido proprietary)
Chemical composition compared (%)
| Element | SKD11 | DC53 |
|---|---|---|
| C | 1.40–1.60 | 0.90–1.10 |
| Si | ≤0.40 | 0.80–1.20 |
| Mn | ≤0.60 | 0.20–0.50 |
| Cr | 11.00–13.00 | 7.80–8.50 |
| Mo | 0.80–1.20 | 1.80–2.20 |
| V | 0.20–0.50 | 0.20–0.40 |
Properties compared
| Property | SKD11 | DC53 |
|---|---|---|
| Delivery condition | Annealed | Annealed |
| Hardness (hardened) | 58–62 HRC | 60–64 HRC |
| Density | 7.70 g/cm³ | 7.70 g/cm³ |
| Toughness | — | ≈2× D2 (maker data) |
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: SKD11 · DC53. Substitution decisions for certified parts stay with the design authority.