Abstract: A method of manufacturing a fuel distributor is disclosed. The fuel distributor includes a distributor pipe for receiving pressurized fuel. The distributor pipe has a tubular main body produced from a forged blank processed mechanically. The unprocessed forged blank or the partially processed forged blank is heat treated at a temperature of between 850° C. and 1100° C., in particular of greater than or equal to 950° C., for a period of time of greater than or equal to 60 seconds.

Abstract: The present invention relates to an exhaust-gas heat exchanger for a motor vehicle, having an outer casing and plates arranged therein lying one above another in layers, wherein a fin plate made of austenitic steel material is arranged in an inner cassette made of ferritic steel material or made of duplex steel and at least two inner cassettes are arranged one above another like plates and the outer casing is formed from duplex steel and engages around the inner cassettes.

Abstract: In a method of producing an exhaust-gas heat exchanger of a motor vehicle, at least one component of the exhaust-gas heat exchanger, e.g. an outer jacket or ducts arranged in the outer jacket or metal sheets, is subjected to an electrochemical machining process to produce a homogenous and smooth surface. The electrochemical machining process may involve plasma-polishing or electro-polishing.