Innovative Mould Steels for Efficient Plastics Processing

Specialised mould steels High-performance tool steels for plastics processing

2025-09-01 Source: Swiss Steel Group 2 min Reading Time

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High demands in plastics processing call for steels that combine precision, durability and resistance to wear. Swiss Steel develops customised mould steels that ensure efficiency, long tool life and consistently high part quality across extrusion, injection moulding and demoulding applications.

Swiss Steel supplies specialised tool steels that combine durability, precision and surface quality.(Source: Swiss Steel) — Swiss Steel supplies specialised tool steels that combine durability, precision and surface quality.
(Source: Swiss Steel)

Plastics are indispensable in modern applications — from consumer goods and automotive components to high-tech parts in aerospace. The quality of the end products depends to a large extent on the precision of the tools used to shape, cut and process the material.

The Swiss Steel Group addresses these requirements with customised tool steels for plastics processing that combine high performance with durability. In extrusion processes, for example, wear-resistant steels are essential for cylinders, screws and dies to ensure reliable production of profiles, pipes or films. Injection moulding applications, by contrast, require materials that offer high thermal conductivity, toughness and polishability in order to produce complex moulded parts with tight tolerances and demanding surface requirements. For demoulding and ejection, a carefully selected steel ensures that finished parts can be removed gently and reliably, which is a prerequisite for efficient production and consistently high part quality.

To meet these diverse demands, Swiss Steel offers a portfolio of specialist steels. Formadur PH X Superclean is a pre-hardened, highly corrosion-resistant and precipitation-hardening grade with low distortion, excellent polishability and weldability, making it particularly suitable for optical applications such as headlamp moulds, lenses or high-tech parts in the chemical and aerospace industries. Corroplast is a low-carbon, corrosion-resistant and low-distortion steel that offers excellent machinability and is delivered directly at 320 HB. It is primarily used for mould frames and plates exposed to cooling and condensation water. Cryodur 2709, a maraging cold-work steel with very good toughness and polishability, is designed for heavily loaded mould cores and geometrically complex parts. Cryodur 2357 combines high hardness with toughness, polishability and wear resistance and is regarded as a universal solution, particularly for moulds with medium wall thicknesses.

Beyond technical performance, the company highlights material purity, homogeneity and uniform hardness as central features of its steels. Together with excellent thermal conductivity and wear resistance, these properties are safeguarded by certified quality management systems such as ISO 9001 and ISO 14001, ensuring consistent quality across applications.

Durability is another key factor. The tool steels from Swiss Steel demonstrate high resistance to abrasion, cracking and deformation. This extends tool life, reduces downtime and enables precise moulding even under high process pressures. For manufacturers in the plastics industry, this translates into greater efficiency and improved competitiveness.

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Date: 08.12.2025

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