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Material uniformity, excellent machinability and polishing, high toughness and high plasticity. High wear resistance under high temperature with excellent overall hardness. Good high temperature strength and thermal fatigue resistance with very low heat deformation.
Die-casting moulds including upper dies, nozzles, thimbles, nitrided sleeves and fixtures. Extrusion dies such as moulds, supports, bushings and choke blocks. Pressing dies for aluminium, magnesium and copper alloys including cold cuts, flash, hot shear, preload rings and wear parts.
| C | Si | Mn | Cr | Mo | V | P (Max) | S (Max) |
|---|---|---|---|---|---|---|---|
| 0.32 – 0.45 | 0.80 – 1.25 | 0.20 – 0.60 | 4.75 – 5.50 | 1.10 – 1.75 | 0.80 – 1.20 | 0.03 | 0.03 |
General Annealing (+A): Hardness ≤ 229 HB
Spheroidizing: Hardness ≤ 229 HB
Temperature: 760–810℃
Delivered: Effective thickness of 50mm per hour
Temperature: 860–880℃
Delivered: Effective thickness of 50mm per hour
Furnace cooling to 760–780℃ isothermal
Air-cooled furnace cooling to 400℃
