Chromium hot-work tool steel imported and stocked in full size range for die-casting and extrusion tooling.
H13 is a chromium hot-work tool steel built to hold its hardness and strength at working temperatures well above what a cold-work steel could survive. It's the standard choice anywhere metal is being cast, forged or extruded against the tool while both are hot.
What makes it useful in practice is thermal fatigue resistance — the repeated heating and cooling cycle a die-casting die goes through all day, cycle after cycle, without the surface cracking into the classic heat-check pattern. It's supplied to us annealed (soft), which keeps it machinable before a toolmaker hardens and tempers it to the working hardness their die needs, typically in the high 40s to low 50s HRC.
We carry H13 across a wide size range because die and mould shops rarely need a standard size — they need a block or bar close to their die dimensions to minimise machining time.
| Grade Designation | H13 / 1.2344 |
| DIN Equivalent | 1.2344 |
| AISI Equivalent | H13 |
| Typical Hardness | Annealed: ~180–220 HB · Hardened: 48–52 HRC |
| Delivery Condition | Annealed (soft) — pre-hardened available on request |
| Heat Treatment Info | Harden 1000–1030°C, oil or air quench; temper 550–650°C to required working hardness |
| Density | 7.80 g/cm³ |
| Chemical Composition (approx. wt%) | C 0.38–0.42, Si 0.90–1.20, Mn 0.30–0.50, Cr 4.80–5.50, Mo 1.10–1.50, V 0.85–1.15 |
Values are typical for the standard, not a mill certificate. Actual test-certificate figures accompany each imported lot.
Call or WhatsApp us directly — most sizing and stock queries get answered same day.
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