Abstract: A high strength steel strip having medium amounts of C, Mn, Si, Cr and Al, wherein the steel strip has a microstructure consisting of, in vol. %: ferrite and bainite together 50-90%, martensite<15%, retained austenite 5-15%, the remainder being pearlite, cementite, precipitates and inclusions together up to 5%.

Abstract: A method of heat treating a cold rolled steel strip includes soaking a cold rolled steel strip having a specific composition above (Ac3?60)° C. for a certain duration thereby obtaining a cold rolled strip having a partially austenitic microstructure; cooling of the resulting soaked steel strip to a temperature below Ms; heating and heat treating the cooled steel strip in the temperature range of Bs-Ms; and cooling the heat treated steel strip to ambient temperature.

Abstract: A method of a heat treating a cold rolled steel strip includes the steps of soaking a cold rolled steel strip above (Ac3?20) for a certain soaking duration thereby obtaining a cold rolled steel strip having an austenitic microstructure; cooling the soaked steel strip to below Ms; heating and heat treating the cooled strip in the temperature range of Bs-Ms; and cooling the heat treated strip to ambient temperature.

Abstract: A method of heat treating a high strength cold rolled steel strip including a) soaking a cold rolled steel strip, b) cooling the soaked steel strip c) heat treating the cooled strip; d) cooling the heat treated steel strip to ambient temperature range; such that the steel strip has a microstructure including various ferrites, retained austenite and martensite. The main components in the steel composition includes carbon, manganese, silicon and aluminium in addition to iron.

Abstract: A heat treatment of a high strength cold rolled steel strip includes the steps of a) soaking a cold rolled steel strip, b) cooling the soaked steel strip c) heat treating the cooled strip; d) cooling the heat treated steel strip to ambient temperature range; such that the steel strip has a microstructure including various ferrites, retained austenite and martensite. The main components in the steel composition include carbon, manganese, silicon and aluminium in addition to iron.

Abstract: A high strength steel strip having medium amounts of C, Mn, Si, Cr and Al, wherein the steel strip has a microstructure consisting of, in vol. %: ferrite and bainite together 50-90%, martensite <15%, retained austenite 5-15%, the remainder being pearlite, cementite, precipitates and inclusions together up to 5%.

Abstract: A steel strip having a hot dip zinc based coating, the steel strip having the following composition, in weight %: C: 0.17-0.24 Mn: 1.8-2.5 Si: 0.65-1.25 Al: ?0.3 optionally: Nb: ?0.1 and/or V: ?0.3 and/or Ti: ?0.15 and/or Cr: ?0.5 and/or Mo: ?0.3, the remainder being iron and unavoidable impurities; with a Si/Mn ratio ?0.5 and a Si/C ratio ?3.0, with an Mn equivalent ME of at most 3.5, wherein ME=Mn+Cr+2 Mo (in wt. %); having a microstructure with (in vol. %): ferrite: 0-40, bainite: 20-70, martensite: 7-30, retained austenite: 5-20, pearlite: ?2, cementite: ?1; having a tensile strength in the range of 960-1100 MPa, a yield strength of at least 500 MPa, and a uniform elongation of at least 12%.

Abstract: A process for producing hot-rolled steel strip with a tensile strength of between 760 and 940 MPa and a steel produced therewith, suitable for producing parts by working such as press forming, bending or stretch flanging.

Abstract: A steel for hot forming having the following composition in weight %: C: 0.12-0.24, Mn: 1.60-2.50, Si: ?0.195, Cr: ?0.9, Al: ?1.3, P: ?0.02, S: ?0.005, N: ?0.03, B: ?0.0004, O: ?0.008 and optionally: Ti: ?0.2, Mo: ?0.2, Nb: ?0.2, V: ?0.2, Ca: ?0.05, the remainder being iron and unavoidable impurities. Also a strip, sheet or blank produced with such a steel, a method for producing a hot formed product, such a product and the use thereof.

Abstract: A steel strip having a hot dip zinc based coating, the steel strip having the following composition, in weight %: C: 0.17-0.24 Mn: 1.8-2.5 Si: 0.65-1.25 Al: ?0.3 optionally: Nb: ?0.1 and/or V: ?0.3 and/or Ti: ?0.15 and/or Cr: ?0.5 and/or Mo: ?0.3, the remainder being iron and unavoidable impurities; with a Si/Mn ratio ?0.5 and a Si/C ratio ?3.0, with an Mn equivalent ME of at most 3.5, wherein ME=Mn+Cr+2 Mo (in wt. %); having a microstructure with (in vol. %): ferrite: 0-40, bainite: 20-70, martensite: 7-30, retained austenite: 5-20, pearlite: ?2, cementite: ?1; having a tensile strength in the range of 960-1100 MPa, a yield strength of at least 500 MPa, and a uniform elongation of at least 12%.

Abstract: A steel for hot forming. The steel for hot forming has the following composition in weight%: C: 0.10-0.25, Mn: 1.4-2.6, Si:<0.4, Cr:<1.0, Al:<1.5, P:<0.02, S:<0.005, N:<0.03, B:<0.0004, 0:<0.008 and optionally: Ti:<0.3, Mo:<0.5, Nb:<0.3, V:<0.5, Ca:<0.05, the remainder being iron and unavoidable impurities.

Abstract: A process for producing hot-rolled steel strip with a tensile strength of between 760 and 940 MPa and a steel produced therewith, suitable for producing parts by working such as press forming, bending or stretch flanging.

Abstract: The steel for hot forming has the following composition in weight %: C: 0.10-0.25, Mn: 1.4-2.8, Si: ?1.0, Cr: ?1.0, Ti: ?0.05, Nb: ?0.05, V: ?0.1, Mo: ?0.1, Al: ?0.05, P: ?0.02, S: ?0.005, Ca: ?0.005, O: ?0.01, N: ?0.02, B: ?0.0004, the remainder being iron and unavoidable impurities. Also disclosed is a strip, sheet or blank produced with such a steel, a method for producing a hot formed product, such a product and the use thereof.