Over the years, Gränges has developed four specific competencies, which have contributed to the company’s technological leadership in heat exchanger materials: development of alloys, cladding, rolling and thermo-mechanical processing and slitting.
Development of alloys involves design of material where aluminium is combined with several alloying materials to achieve specific properties. Gränges has special expertise when it comes to developing alloys and combinations, which have properties adapted for each stage in the customers’ production processes – from forming to assembly and brazing.
Cladding is an important competence that provides high added value and differentiates Gränges from other producers of rolled products for general purposes. The company produces single and twosided plated products, symmetrical and asymmetrical products and MULTICLAD® material with many different alloy combinations.
In the rolling and thermo-mechanical process, the microstructure of the alloys is changed to achieve desired properties in the final product. Gränges has long experience of thermo-mechanical processing and its effect on the behaviour of materials in the brazing process.
Gränges has leading competence and experience in slitting technology, which plays an important part in the production of heat exchanger materials. The slitting process requires both craftsmanship and automation expertise in order to achieve the close tolerances that are required in terms of bandwidth, edge quality and winding.