Metallgesellschaft Aktiengesellschaft

Heinz Lommel

Manfred Potzschke

Heinz J Althoff

Kurt Jager

Manfred Moller

Jurgen Althoff

An Al-Mn alloy which can be brazed and enamelled, has a high resistance to corrosion and in a completely recrystallized state has an ultimate tensile stress of at least 150 N/mm.sup.2 ; a process for producing such an Al-Mn alloy by forming a melt comprising 0.8 to 2 weight percent manganese, 1.40 to 3 weight percent silicon, 0.2 to 1 weight percent iron, 0 to 0.2 weight percent copper, 0 to 0.2 weight percent magnesium, balance aluminum and in a total up to 0.2 by weight inevitable impurities which are due to the manufacture, casting said melt to form an ingot, annealing said ingot to 400.degree. to 620.degree. C. for 2 to 20 hours, hot-rolling and cold-rolling said ingot to final dimensions of the semifinished product, and subsequently annealing the semifinished product at a temperature above 450.degree. C.

Al-Mn Alloy and process of manufacturing semifinished products having

In the fabrication of an exhaust system of an internal-combustion engine, a tube-bank heat exchanger, a ducted-plate solar collector, saline water reclamation plant and enameled kitchenware, the improvement which comprises the use of a wrought aluminum alloy consisting essentially of:

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Neu-Anspach, Germany

Heinz Lommel