H13
Data verifiedH13 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.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.32–0.45 |
| Si | 0.80–1.20 |
| Mn | 0.20–0.50 |
| Cr | 4.75–5.50 |
| Mo | 1.10–1.75 |
| V | 0.80–1.20 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Working hardness | 44–52 HRC |
| Density | 7.80 g/cm³ |
| Hot hardness | Excellent to ~600 °C |
Heat treatment
Anneal 850–880 °C; harden 1020–1050 °C air/oil; double temper 550–600 °C to working hardness.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2344 |
| aisi | H13 |
| jis | SKD61 |
| gb | 4Cr5MoSiV1 |
Compare side by side: H13 vs SKD61 · H13 vs H11
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Aluminum/magnesium die casting dies, extrusion dies, hot forging inserts, plastic molds for high-volume runs.
Processing: Use ESR quality for large or polished dies. Nitriding extends die life; avoid sharp corners that start heat checks.
FAQ
- H13 vs H11?
- H13 has more vanadium and slightly more carbon — better hot wear and heat-check resistance. H11 is a little tougher. Die casting standard: H13.
- What hardness for aluminum die casting dies?
- 44–48 HRC is the common window (NADCA), balancing heat checking against cracking.
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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.