53S Tool Steel
Air-hardening chromium hot-work die steel, equivalent to H13 (1.2344). Offers excellent resistance to thermal fatigue (heat checking), good toughness and red hardness, making it the standard choice for die casting, extrusion and hot forging tooling.
- Equivalents
- H13, 1.2344, AISI H13
- Standard
- BS EN ISO 4957
- Hardness
- 44–52 HRC (working)
- Sizes
- 10mm – 500mm
- Applications
- Die casting dies, Extrusion tooling, Hot forging dies, Hot shear blades, Plastic moulds
- Heat treatment
- Harden: 1000–1030°C, air cool. Temper: 550–650°C (double temper).