H11
Data verifiedH11 is a 5% chromium hot work steel similar to H13 but with less vanadium, giving slightly higher toughness and deep air hardening. Used for hot forging, die casting and aerospace structural parts (as the 4340-alternative H11 mod in some specs).
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.33–0.41 |
| Si | 0.80–1.20 |
| Mn | 0.20–0.50 |
| Cr | 4.80–5.50 |
| Mo | 1.10–1.50 |
| V | 0.30–0.50 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Working hardness | 44–54 HRC |
| Density | 7.80 g/cm³ |
Heat treatment
Harden 1000–1030 °C air/oil; temper 540–600 °C, double temper recommended.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2343 |
| aisi | H11 |
| jis | SKD6 |
| gb | 4Cr5MoSiV |
Compare side by side: H11 vs H13 · H11 vs SKD61
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Hot forging dies, pressure die casting tools, extrusion tooling, high-strength aerospace fasteners.
Processing: Deep hardening in air; good for large tools. Grind with care to avoid tempering burns.
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Ask for a quotationVisit NasteelSource: ASTM A681 / EN published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.