IRON ALLOY, ESPECIALLY FOR USE IN AN EXHAUST GAS CLEANING UNIT

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The invention relates to an iron alloy, especially for use with carrier-films in an exhaust gas cleaning unit, a metal film and an exhaust gas cleaning unit, especially an exhaust gas catalyst, particle filter and mixing device, preferably for use in motor vehicles in order to reduce the emission of pollutants. In order to enable known and tried metal film carrier concept of passenger car exhaust gas catalysts to be adapted in a suitable manner to the engine requirements of heavy goods vehicles, the iron alloy comprises 15-22 wt. % chrome, maximum 0.1 wt. % carbon, 0.05-1.0 wt. % manganese, 0.1-0.5 wt. % silicon, 2.5-7 wt. % aluminium, 0.01-0.1 wt. % zircon, maximum 0.1 wt. % titanium, 0.001-0.01 wt. % calcium, 0.01-0.1 wt. % vanadium, 0.001-0.02 wt. % tin and rare 0.02-0.1 wt % earth metals and an iron radical with normal auxiliary elements amounting to 100 wt. %.