Non-ferrous metals are metals and alloys that either contain no iron at all or contain iron only in trace amounts.
What Are Non-Ferrous Metals and Their Properties?
Non-ferrous metals comprise a wide variety of different materials, including aluminium, copper, zinc, tin, lead, nickel and their alloys. Unlike iron and steel, they generally have lower densities, excellent electrical and thermal conductivity, and good corrosion resistance. These properties make them ideal for applications where weight savings and resistance to environmental influences are decisive, such as in the automotive industry, electrical engineering and construction.
Applications and Examples of Non-Ferrous Metals
Aluminium, for example, is widely used in vehicle and aircraft construction as well as in the production of packaging, since it is light, robust and corrosion-resistant. Copper is found in electrical cables, pipelines and electronic components, thanks to its excellent electrical and thermal conductivity. Brass and bronze, two copper alloys, are often used for jewellery, art objects and technical applications. Zinc is mainly used for corrosion-protection coatings and alloys, an area also covered in our overview of the zinc vapour process, while nickel and its alloys are used in applications that require particular corrosion resistance or heat resistance.
Importance of Non-Ferrous Metals in the Foundry Industry
Non-ferrous metals play a central role in foundry technology, as they make it possible to manufacture complex-shaped, often highly application-specific components. Precision casting or die casting of aluminium, for instance, enables particularly fine and detailed structures while still achieving high strength and low weight. Non-ferrous metal castings are also characterised by good mechanical workability and surface quality, which makes further processing and integration into different products easier. Their flexibility and wide range of applications make non-ferrous metals indispensable in modern manufacturing technology.
Non-Ferrous Metals at a Glance
| Metal | Key property / application (per source) |
|---|---|
| Aluminium | Light, robust, corrosion-resistant; used in vehicle and aircraft construction and in packaging; enables fine, detailed structures in precision casting or die casting |
| Copper | Excellent electrical and thermal conductivity; used in electrical cables, pipelines and electronic components |
| Brass / Bronze (copper alloys) | Used for jewellery, art objects and technical applications |
| Zinc | Used for corrosion-protection coatings and alloys |
| Tin | General non-ferrous properties: lower density, good electrical/thermal conductivity, good corrosion resistance |
| Lead | General non-ferrous properties: lower density, good electrical/thermal conductivity, good corrosion resistance |
| Nickel (and alloys) | Used in applications requiring particular corrosion resistance or heat resistance |
Frequently Asked Questions About Non-Ferrous Metals
What counts as a non-ferrous metal?
Non-ferrous metals are metals and alloys that contain no iron, or contain iron only in trace amounts. Typical examples are aluminium, copper, zinc, tin, lead, nickel and their alloys, including brass and bronze.
Why are non-ferrous metals used in the automotive industry?
Compared with iron and steel, non-ferrous metals generally have a lower density combined with good electrical and thermal conductivity and good corrosion resistance. These properties are valuable wherever weight savings and resistance to environmental influences matter, which is why non-ferrous metals are used in the automotive industry, electrical engineering and construction.
What role do non-ferrous metals play in foundry casting?
In foundry technology, non-ferrous metals make it possible to produce complex, application-specific components. Precision casting or die casting of aluminium, for example, allows fine, detailed structures with high strength and low weight, and non-ferrous metal castings offer good mechanical workability and surface quality that simplify further processing.