H19 vs H13
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.
H19
Tool Steel
H19 is a tungsten-cobalt hot work steel with red hardness well beyond the 5% chromium family. It serves the hottest die positions — brass extrusion and severe hot heading — where H13 softens too fast.
Standards: AISI H19
H13
Tool Steel
H13 is the global standard hot work tool steel for aluminum die casting and extrusion. Its Cr-Mo-V chemistry resists heat checking and thermal fatigue while keeping good toughness at working temperatures.
Standards: DIN 1.2344 · AISI H13 · JIS SKD61 · GB 4Cr5MoSiV1
Chemical composition compared (%)
| Element | H19 | H13 |
|---|---|---|
| C | 0.35–0.45 | 0.32–0.45 |
| Si | 0.20–0.50 | 0.80–1.20 |
| Mn | 0.20–0.50 | 0.20–0.50 |
| Cr | 4.00–4.75 | 4.75–5.50 |
| W | 3.75–4.75 | — |
| V | 1.65–2.25 | 0.80–1.20 |
| Co | 4.00–4.75 | — |
| Mo | — | 1.10–1.75 |
Properties compared
| Property | H19 | H13 |
|---|---|---|
| Delivery condition | Annealed | Annealed |
| Working hardness | 40–52 HRC | 44–52 HRC |
| Density | 8.00 g/cm³ | 7.80 g/cm³ |
| Hot hardness | Very high (cobalt-bearing) | Excellent to ~600 °C |
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: H19 · H13. Substitution decisions for certified parts stay with the design authority.