H10
Data verifiedH10 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.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.35–0.45 |
| Si | 0.80–1.20 |
| Mn | 0.20–0.50 |
| Cr | 3.00–3.75 |
| Mo | 2.00–3.00 |
| V | 0.25–0.75 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Working hardness | 38–50 HRC |
| Density | 7.80 g/cm³ |
| Thermal fatigue | Excellent for hot work |
Heat treatment
Harden 1000–1030 °C air/oil; double temper 540–620 °C.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2365 |
| aisi | H10 |
| jis | SKD7 |
| gb | 3Cr3Mo3V (near) |
Compare side by side: H10 vs H13 · H10 vs H11 · H10 vs H12
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Extrusion dies and containers, die casting dies, hot forging inserts, dummy blocks.
Processing: Water cooling channels are practical thanks to its thermal fatigue resistance; machine annealed, nitride for surface life.
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Ask for a quotationVisit NasteelSource: ASTM A681 / EN ISO 4957 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.