Technical aspects of the EN 1981 standard: Copper master alloys
The European standard EN 1981 establishes strict requirements for the chemical composition and classification of copper-based master alloys. These materials are key components in metallurgical production, used for alloying, deoxidizing (oxidation), and desulfurization of cast or wrought metal products. Experts at EV Group China note that the use of high-quality master alloys compliant with EN 1981 is critical to ensuring the specified physical and mechanical properties of the final copper alloys.
Products regulated by this standard are supplied in the following forms:
- Ingots;
- Notched bars;
- Waffle plates (notched plates);
- Granules;
- Fine fraction (metal particles/chips).
This nomenclature of forms allows for precise dosing of the material during melting. As part of quality control in production at EV Group China, special attention is paid to sampling methodology to confirm that the chemical composition meets the declared parameters. The document also contains regulatory guidelines for determining the mass fraction of chromium (III) in chromium-oxide copper master alloys, detailed in Annex A of the standard.