Let’s clarify: what is die casting?

Die casting (also known as high-pressure die casting) is an industrial process used to produce metal parts with complex geometries, in a short time and with high dimensional accuracy. At the core of this process are the steel molds made from special steels, which are essential to ensure high performance and durability. The choice of material is therefore crucial and is also guided by the recommendations and international standards defined by NADCA (North American Die Casting Association), a global benchmark for the sector.

The mold is the heart of the process: it must withstand high pressures, repeated cycles, thermal shocks, and surface wear.
This is why the choice of tool steel is critical, as it must meet a wide range of requirements:

• High hot strength and toughness
• Resistance to wear and thermal fatigue
• High homogeneity and purity
• Good thermal conductivity
• High resistance to thermal shock
• High temper resistance
• Dimensional stability

Each die casting project has its own specific requirements: alloy type (aluminum, magnesium, zinc), geometry complexity, expected tool life, and operating conditions.
Based on these parameters, our specialists support customers in evaluating the most suitable material, also with reference to NADCA guidelines and the AIM (Italian Metallurgy Association) specifications, which are recognized as international standards for mold design and management.

We do not just supply steel blocks:

• Technical consultancy to select the best solution for each specific project.
• Certified metallurgical quality ensuring traceability and high-grade material.
• A complete range of special steels developed for the die casting sector.

Thanks to our partnership with Swiss Steel Group, Bonomi Acciai provides customers with NADCA-approved and internationally recognized materials, ensuring reliable performance and constant support.

Die casting is a process that requires experience, reliable materials, and technical knowledge.
Bonomi Acciai, the Italian partner of Swiss Steel Group, supports toolmakers, designers, and foundries in selecting the most suitable steel and heat treatment for every requirement.