Corrosion-Resistant Mold Steel Designed For Polishability

Uddeholm USA’s Tyrax ESR combines toughness, corrosion and wear resistance. This grade was developed to mold high-performance plastics, often filled with glass fiber reinforcements and additives like flame retardants. This matrix-based microstructure is designed to achieve a high-gloss surface with only a few polishing steps, reducing the tool lead time and enabling the production of better plastic parts, the company claims. The Tyrax ESR can achieve a high hardness (up to 58 HRC) and is reportedly a suitable upgrade from AISI 420 ESR, AISI S7 and AISI 440C.

Uddeholm distinguishes itself through advanced metallurgy and a customer-centric approach, collaborating closely with clients to develop bespoke solutions to improve mold life, minimize maintenance costs or enhance overall productivity. With a keen focus on enhancing efficiency and reducing downtime, its solutions now include additive manufacturing, metal powders and PVD coatings, which empower manufacturers to achieve optimal performance and consistency in plastics production.