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Example: AMAG TopClad® products are used for the manufacture of water coolers, oil coolers, air-conditioning equipment in the automotive industry, ensuring the closest tolerances of the cladding thicknesses.


The development of aluminium alloys to meet the varied requirements of heat exchanger manufacturers has advanced in step with the growing use of aluminium brazing material. Optimized material selection involves criteria as there are formability, strength, corrosion resistance, fatigue resistance and suitability for brazing. AMAG´s cladding process ensures tight metallurgical bonding of the filler material onto the core ingot and thus top quality of the brazing material. Many years of experience in roll cladding enable us to ensure close tolerances for the cladding thickness, which is essential for obtaining stable brazing results. We can produce extremely thin cladding layers of 1.5%, as well as brazing materials with a cladding thickness of 20%.


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Typically, non heat-treatable Al-Mn based alloys of the 3xxx series are used for the core material of aluminium brazing compounds.

TopClad® LL

LL (LongLife)

In order to meet the demands for higher strength and improved corrosion resistance, AMAG developed modified 3xxx materials which are well known as LongLife alloys. Special chemistries and thermo-mechanical processing serve to improve the corrosion resistance levels offered by conventional 3xxx alloys.

TopClad® HS

HS (High Strength)


Higher mechanical strength after brazing can be obtained by the heat treatable 6xxx alloys as the EN AW-6063 (AlMgSi) or the EN AW-6951 (AlMgSiCu) by means of solid solution and precipitation hardening.

TopClad® UHS

UHS (Ultra High Strength)


AMAG´s speciality in the field of heat exchanger materials is the adapted EN AW-7020 alloy to which a further barrier layer has to be applied in order to prevent diffusion phenomena. EN-AW 7020 core material belongs to the heat treatable alloys which in addition to high static strength, is characterised by excellent weldability and high welded seam strength. After brazing yield strength can rise to over 140 MPa due to room temperature ageing.


AMAG TopClad®ML (Multi Layer) brazing material allows the production of new and innovative heat exchangers which meets customer specific needs.

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  • Oilcooler
  • Watercooler
  • Air-condition
  • Charge air cooler
  • EGR (Exhaust Gas Recirculation)
  • Tubestock

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