1.2312 | Plastic mold steel | P20+S

1.2312 | Plastic mold steel | P20+S

DIN 1.2312 is good for plastic injection moulds for thermoplastics, extrusion dies for thermoplastic, compression molds application. Tools for plastics processing and moulds for pressure die casting.

Characteristics

Characterised by good toughness at moderate strength levels, 1.2312 tool steel is a highly versatile engineering material. The alloy is a pre-hardened plastic mould steel and provides unified hardness across wide sections. Typical applications for the alloy include tooling, die casting dies for zinc and machine cut plastic moulds. The inclusion of nickel and chromium during the alloying process enhances the hardness and toughness of the product.

Designation by Standards

DIN 1.2312 plastic mold steel

Compared with other plastic mold steels, 1.2312 steel is the steel with the highest sulfur content, and is also widely known as P20+S steel. Its chemical composition is as follows:

Heat Treatment

already pre-toughened

Nitriding:

Before Nitriding, stress-relief annealing is recommended at 580 °C.

Hard chroming:

After the hard chroming, the mold must be annealed for about 3 to 4 hours at 180 °C to avoid brittle fractures from hydrogen.

Hardening:- 840 to 860 °C.

Cooling:

to 180 °C/220 °C in an oil/hot bath, then in the air to about 100 °C obtainable hardness: 52 HRC.

Tempering:

Slow heating to tempering temperature immediately after hardening. Minimum time in a furnace: 1 hour per 25 mm part thickness.

Aplicationciones

1.2312 steel is used for mold chassis, injection molding tools, mechanical engineering, and construction parts. 1.2312 steel is reliable in the plastics industry, in the treatment of thermosetting materials and thermoplastics. When high hardness requirements are placed on it, cold-working steel with a high sulfur content is also used for large injection molds.

Forging

Temperatures of approximately 1050°C – 850°C are common during the forging process.