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Higher toughness and impact strength than conventional 1.2344, especially in transverse direction. Excellent resistance to thermal fatigue and heat checking under cyclic high-temperature conditions. Improved polishability and machinability due to reduced inclusions and segregation.
High-performance die-casting moulds for aluminium, magnesium and zinc alloys. Die inserts, cores, slides and sleeves requiring superior thermal shock resistance. Hot forging dies and press tools subjected to heavy impact and cyclic stress. Extrusion dies for aluminium alloys.
| 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 | 1.00 | 0.02 | 0.03 |
ESR Annealed (+A): Hardness ≤ 248 HB.
ESR condition ensures extremely low non-metallic inclusions and uniform carbide distribution,
reducing segregation, improving through-thickness hardness consistency,
and enhancing fatigue life for extended die service.
Round: Dia 20 – Dia 500 mm
Flat / Block: 50 – 500 mm
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℃
Microstructure in accordance with NADCA #207-03 GA1~GA3; GB1–GB2 superfine annealing.
