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Large Mould Block 1 2738 Pre Hardened - China

price: contact company for price

Large Mould Block 1 2738 Pre Hardened

Products Photos Catalog Mould Block 2738 Pre Photos Catalog

1.2738 pre-hardened plastic mould steel - large blocks, 28-32 HRC, nickel added for through-hardening.

Chemical composition (typical, ladle analysis):

C 0.35-0.45% | Si 0.20-0.50% | Mn 1.30-1.60% | Cr 1.80-2.10% | Mo 0.15-0.25% | Ni 0.90-1.20% | P max 0.020% | S max 0.015% The 1% nickel raises hardenability so thick sections harden more uniformly than 1.2311 - On a 500 mm block that is the difference between 30 HRC at the core and 26 HRC - and it shows up in polishability and dimensional stability.

Delivery condition: pre-hardened and tempered 28-32 HRC, stress relieved.

Applications: large injection moulds, automotive interior and exterior parts, appliance housings, mould bases for deep cores, thick blocks requiring uniform hardness.

Available sizes: plate 50-800 mm thick, width to 1, 600 mm, blocks to 5 tonnes.

Cut square, milled or pre-machined to drawing.

Quality: mill test certificate per heat with composition, hardness and five-point hardness traverse across the section; ultrasonic inspection to SEP 1921 available for heavy blocks.

Shipping: heavy blocks on steel pallets or in open-top containers, Shanghai and Ningbo ports, FOB or CIF terms.


Company Contact:


  • Phone: +8615024056480

  • Address: 30 Huahu Avenue, Huangshigang District, Huangshi , Hubei , China

  • Email: Email


Published date: November 12, 2026 - Modified date: November 12, 2026

  • Business Description: Hubei Keyspark Special Steel Co., Ltd. is an integrated special steel manufacturer in Huangshi, Hubei, China.

    Melting, ladle refining, vacuum degassing, ESR, forging and heat treatment are all in house.

    Products: plastic mold steel (1.2311/P20, 1.2312, 1.2316, 1.2738), cold work steel (1.2083, 1.2379/D2, DC53), hot work steel (1.2344/H13, 1.2714), high speed steel, alloy and stainless steel.

    Supplied with mill test certificates worldwide.

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