1.2365 / 32CrMoV12-28 vs H10
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.
1.2365 / 32CrMoV12-28
Tool Steel
1.2365 is the high-molybdenum hot work steel of the H10 family: nearly 3% Mo buys outstanding tempering resistance and hot strength for tools that stay hot for a long time, such as brass extrusion and copper alloy die casting tooling. It trades a little toughness for that hot hardness.
Standards: DIN 1.2365 · AISI H10 (close) · JIS SKD7 (near) · GB 3Cr3Mo3V (near)
H10
Tool Steel
H10 is a Cr-Mo hot work steel with lower chromium and higher molybdenum than H13, giving it better thermal conductivity and heat-check resistance in water-cooled dies. It is a long-standing choice for brass and aluminum extrusion tooling.
Standards: DIN 1.2365 · AISI H10 · JIS SKD7 · GB 3Cr3Mo3V (near)
Chemical composition compared (%)
| Element | 1.2365 / 32CrMoV12-28 | H10 |
|---|---|---|
| C | 0.28–0.35 | 0.35–0.45 |
| Si | 0.10–0.40 | 0.80–1.20 |
| Mn | 0.15–0.45 | 0.20–0.50 |
| P | ≤0.030 | — |
| S | ≤0.030 | — |
| Cr | 2.70–3.20 | 3.00–3.75 |
| Mo | 2.60–3.00 | 2.00–3.00 |
| V | 0.40–0.70 | 0.25–0.75 |
Properties compared
| Property | 1.2365 / 32CrMoV12-28 | H10 |
|---|---|---|
| Delivery condition | Annealed | Annealed |
| Working hardness | 44–52 HRC | 38–50 HRC |
| Density | 7.85 g/cm³ | 7.80 g/cm³ |
| Hot hardness | Very good — high-Mo hot work grade | — |
| Thermal fatigue | — | Excellent for hot work |
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: 1.2365 / 32CrMoV12-28 · H10. Substitution decisions for certified parts stay with the design authority.