[BRAUN, Michael, OTTO, Manuel, GEORGEOU, Zacharias, SPRINGUB, Bianca] DE,38239 Salzgitter,Eisenhüttenstrasse 99;

[SPITZER KARL-HEINZ, EICHHOLZ HELLFRIED, SPRINGUB BIANCA, SCHMIDT-JUERGENSEN RUNE, SCHAEPERKOETTER MARKUS] DE Deformable light alloy steel with transformation induced plasticity (TRIP) and twinning induced plasticity (TWIP) properties of composition (wt.%):C (0.05 to =1.0), Al 0.0 to =11.0), Si (0.0 to =6.0), Al+Si greater than 0.05, Mn (9.0 to =25.0, H less than 20 ppm, remainder Fe and usual steel impurities, where alloying composition is present in various phases. Alloy can have decreased Mn content and increased C content or increased content and decreased C content. The C/Mn pair value (sic) lies in C/Mn coordinate system approximating to linear bond line (sic), which is distance from the C/Mn pair value in equilibrium between gamma-austenite and alpha\'- martensite phases.

[EVERTZ THOMAS DR, OTTO MANUEL DR, SPRINGUB BIANCA DR, GEORGEOU ZACHARIAS] DE

[JOHN DANIELA, OTTO MANUEL, SCHMIDT JURGENSEN RUNE, EVERTZ THOMAS, GEORGEOU ZACHARIAS, SPRINGUB BIANCA] DE A method for producing a workpiece having properties which are adjustable across a wall thickness or strip thickness of the workpiece, includes the steps of subjecting the workpiece to a decarburizing annealing treatment under an oxidizing atmosphere and to an accelerated cooling and/or a cold forming for generating a property gradient of the workpiece, wherein the workpiece is made of an austenitic lightweight steel which has an alloy composition which includes by weight percent 0.2% to 1% carbon, 0.05% to <15% aluminum, 0.05% to 6.0% silicon, 9% to <30% manganese, and at least one element selected from the group consisting of chromium, copper, boron, titanium, zirconium, vanadium and niobium, wherein chromium=4.0%; titanium+zirconium=0.7%; niobium+vanadium=0.5%, boron=1%, the remainder iron including common steel companion elements.

[SPITZER KARL HEINZ, EICHHOLZ HELLFRIED, SPRINGUB BIANCA, SCHMIDT JUERGENSEN RUNE, SCHAEPERKOETTER MARKUS] DE The invention relates to a deformable lightweight structural steel, which exhibits a resistance to hydrogen embrittlement, has TRIP-and TWIP properties and contains the following elements (in wt.-%): C 0.05 to 0.05; Mn 9.0 to = 25.0; H < 20 ppm, the remainder being composed of iron including usual steel companion elements, whereby different phases are present depending on the alloy composition. According to the invention, said lightweight structural steel is characterized in that a higher C content is associated with a lower Mn content while a low C content is associated with a higher Mn content, the C-Mn value pairs being positioned in a C-Mn coordinate system approximatively on a straight connecting line that is distant from the connecting line of the C-Mn value pairs being in balance between the austenite und martensite phases.

[EVERTZ THOMAS DR, OTTO MANUEL DR, GEORGEOU ZACHARIAS, SPRINGUB BIANCA DR, JOHN DANIELA DR, SCHMIDT-JUERGENSEN RUNE DR] DE A method for producing a workpiece having properties which are adjustable across a wall thickness or strip thickness of the workpiece, includes the steps of subjecting the workpiece to a decarburizing annealing treatment under an oxidizing atmosphere and to an accelerated cooling and/or a cold forming for generating a property gradient of the workpiece, wherein the workpiece is made of an austenitic lightweight steel which has an alloy composition which includes by weight percent 0.2% to 1% carbon, 0.05% to <15% aluminum, 0.05% to 6.0% silicon, 9% to <30% manganese, and at least one element selected from the group consisting of chromium, copper, boron, titanium, zirconium, vanadium and niobium, wherein chromium=4.0%; titanium+zirconium=0.7%; niobium+vanadium=0.5%, boron=1%, the remainder iron including common steel companion elements.

[BRAUN MICHAEL, OTTO MANUEL, GEORGEOU ZACHARIAS, SPRINGUB BIANCA] DE

[MICHAEL BRAUN, MANUEL OTTO, ZACHARIAS GEORGEOU, BIANCA SPRINGUB] DE Salzgitter An energy-storing container is made of a lightweight steel having the following chemical composition (in wt %): C 0.04-2%; Mn 14-30%; Al 1.5-12%; Si 0.3-3%; Cr 0.12-6%, and additionally one or more of the following elements: Ti, V, Nb, B, Zr, Mo, Ni, Cu, W, Co, P, N, each at up to 5% and in total at up to 10%, wherein the remainder is Fe including common steel tramp elements, wherein the concrete alloy composition is selected in order to limit the α′-martensite fraction before or after a forming process to no more than 3%, with the stipulation that the α′-martensite equivalent according to 0.1*wt % Mn wt % C 0.05*wt % Si is between 3.4 and 10.5.

[SPITZER, Karl-Heinz, EICHHOLZ, Hellfried, SPRINGUB, Bianca, SCHMIDT-JÜRGENSEN, Rune, SCHÄPERKÖTTER, Markus] Eisenhüttenstrasse 99, 38239 Salzgitter, DE

[FLUEGGE WILKO, HOEFEMANN MATTHIAS, SPRINGUB BIANCA DR, GEORGEOU ZACHARIAS] DE