TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The semi-finished product composition, which is subjected to thermomechanical treatment, comprises chromium (12-30 wt.%), manganese (0.001-2.5 wt.%), niobium (0.1-2 wt.%), tungsten (0.1-5 wt.%), silicon (0.05-1 wt.%), carbon (0.002-0.1 wt.%), nitrogen (0.002-0.1 wt.%), sulfur (maximum 0.01 wt.%), iron (balance amount) and conventional smelting impurities, where (at room temperature) a mechanical deformability that is measured as plastic elongation at break of greater than 13% is provided. The alloy further comprises: 0.02-0.3 wt.% of lanthanum; 0.01-0.5 wt.% of titanium; 0.02-0.3 wt.% of one or more elements such as cerium, praseodymium, neon, scandium, yttrium, zirconium or hafnium; 0.001-0.5 (preferably 2.5-5) wt.% of aluminum; 0.0001-0.07 wt.% of magnesium and calcium, and 0.002-0.03 wt.% of phosphorus; 0.01-3 wt.% of nickel, cobalt or copper; and up to 0.005 wt.% of boron. The thermomechanically-treated iron-chromium alloy (that contains precipitated Laves phase in a finely distributed form) comprises 12-30 wt.% of chromium, 0.001-2.5 wt.% of manganese, 0.1-2 wt.% of niobium, 0.1-5 wt.% of tungsten, 0.05-1 wt.% of silicon, 0.02-0.3 wt.% of carbon and nitrogen, maximum 0.005 wt.% of sulfur, iron (balance amount) and conventional smelting impurities. The thermomechanically-treated iron-chromium alloy comprises 0.02-0.2 wt.% of lanthanum, titanium and one or more elements of cerium, praseodymium, neon, scandium, yttrium, zirconium or hafnium, 0.0001-0.05 wt.% of magnesium, 0.0001-0.03 wt.% of calcium, 0.002-0.03 wt.% of phosphorus, up to 0.003 wt.% of boron, 0.3-1 wt.% of niobium, 0.15-0.5 wt.% of silicon, maximum 0.2 wt.% of vanadium and/or maximum 0.005 wt.% of sulfur, maximum 0.01 wt.% of oxygen, and maximum 0.01 wt.% of zinc, tin, lead, selenium, tellurium, bismuth and antimony, where the tungsten portion is completely or partially replaced by at least one element of molybdenum and/or tantalum.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: In the second step, the deformed semi-finished product is subjected to heat treatment at 550-1060 degrees C for a time period of tmin to tmax under inert gas or air and subsequently quenching in resting or moving (blowing) inert gas or air, or in water or subjected to heat treatment to 800 degrees C in a cooled oven, where: the tmin and tmax are calculated according to formulae as given in the specification; and the desired component is made before or after the heat treatment. In the first step, the alloy is solution-annealed at greater than or equal to 1050 degrees C for more than 6 minutes or at greater than or equal to 1060 degrees C for more than 1 minute. The solution-annealing is carried out at temperature that is greater than or equal to solution-annealing temperature, preferably greater than or equal to 1050 degrees C for more than 6 minutes, respectively greater than or equal to 1060 degrees C for more than 1 minute, and subsequently cooled in resting or moving (blowing) inert gas or air, or in water, where only few or even no Laves phases (Fe2(M, Si) or Fe7(M, Si)6) and/or Fe-containing particles, Cr-containing particles, Si-containing particles and/or carbides are present in the initial state of the semi-finished product before the deformation. The deformation of the semi-finished product is carried out by hot deformation. The hot deformation of the semi-finished product is carried out with an initial temperature of greater than 1070 degrees C, where the last 0.05-90% or 95% of the mechanical deformation is carried out at 1000-500 degrees C. The hot deformation of the semi-finished product is subsequently subjected to cold deformation. The deformation of the semi-finished product is carried out by cold deformation. The degree of the cold deformation of the semi-finished product is 0.05-99% (preferably 0.05-90%). The mechanical deformation of the semi-finished product is 20-99% and the deformed semi-finished product is subjected to heat treatment at 950-1060 degrees C for the time period of tmin and tmax under inert gas or air and subsequently quenching in resting or moving (blowing) inert gas or air, or in water, where the desired component is formed. The semi-finished product is formed by sheeting, stripping, sticking, forging, piping or wiring. The heat treatment is carried out after finishing the component. The thermomechanical treatment of the semi-finished product produces high creep strength of semi-finished product and/or elongation at break of the component of greater than 13% at room temperature. The breaking time of coarse grained, completely recrystallized microstructure exceeds a factor of at least 3.