Abstract: A cold-rolled and heat treated steel sheet, has a composition comprising 0.1%?C?0.4%, 3.5%?Mn?8.0%, 0.1%?Si?1.5%, Al?3%, Mo?0.5%, Cr?1%, Nb?0.1%, Ti?0.1%, V?0.2%, B?0.004%, 0.002%?N?0.013%, S?0.003%, P?0.015%. The structure consists of, in surface fraction: between 8 and 50% of retained austenite, at most 80% of intercritical ferrite, the ferrite grains, if any, having an average size of at most 1.5 ?m, and at most 1% of cementite, the cementite particles having an average size lower than 50 nm, martensite and/or bainite.

Abstract: A steel sheet that is welded and then cold rolled to a thickness between 0.5 mm and 3 mm, the deformation ratio created by cold rolling in the base metal is equal to ?MB, for which the deformation ratio created by the cold rolling in the welded joint is equal to ?S, where: 0.4 ? ?S ? ? M ? B < 0.7 .

Abstract: A cold rolled and annealed steel sheet is provided which includes by weight: 0.6<C<1.3%, 15?Mn<35%, 6.0?Al<15%, Si?2.40%, S?0.015%, P?0.1%, N?0.1%, possibly one or more optional elements chosen among Ni, Cr and Cu in an individual amount of up to 3% and possibly one or more elements chosen among B, Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0%, the remainder of the composition making up of iron and inevitable impurities resulting from the elaboration, the microstructure of said sheet comprising at least 0.1% of intragranular kappa carbides, wherein at least 80% of such kappa carbides have an average size below 30 nm, optionally up to 10% of granular ferrite, the remainder being made of austenite, the average grain size and average aspect ratio of the austenite being respectively below 6 ?m and comprised between 2 and 10 and the average grain size and average aspect ratio of the ferrite, when present, being respectively below 5 ?m and below 3.

Abstract: A design and a production method of a front floor reinforcement structure 1 for a vehicle 3 having a battery pack 5 in the tunnel 7 designed to improve the energy absorption of the vehicle during a side impact by involving the front floor panel 11 in the energy absorption during the side impact. The front floor reinforcement structure 1 includes a front floor cross member 13 having a non-deformable portion 14 located on the end of the front floor cross member 13 closest to the side sill 9 and a deformable portion 16 located on the end of the front floor cross member 13 closest to the tunnel 7. The resistance to plastic deformation of the non-deformable portion 14 is greater than the resistance to plastic deformation of the deformable portion 16, which is itself greater than the resistance to plastic deformation of the front floor panel 11.

Abstract: A method for producing a welded blank (1) includes providing two precoated sheets (2), butt welding the precoated sheets (2) using a filler wire. The precoating (5) entirely covers at least one face (4) of each sheet (2) at the time of butt welding. The filler wire (20) has a carbon content between 0.01 wt. % and 0.45 wt. %. The composition of the filler wire (20) and the proportion of filler wire (20) added to the weld pool is chosen such that the weld joint (22) has (a) a quenching factor FTWJ: FTWJ?0.9FTBM?0, where FTBM is a quenching factor of the least hardenable substrate (3), and FTWJ and FTBM are determined: FT=128+1553×C+55×Mn+267×Si+49×Ni+5×Cr?79×Al?2×Ni2?1532×C2?5×Mn2?127×Si2?40×C×Ni?4×Ni×Mn, and (b) a carbon content CWJ<0.15 wt. % or, if CWJ?0.15 wt. %, a softening factor FAWJ such that FAWJ>5000, where FA=10291+4384.1×Mo+3676.9Si?522.64×Al?2221.2×Cr?118.11×Ni?1565.1×C?246.67×Mn.

Abstract: A non-conductive substrate being at least partially coated with a paint including reduced graphene oxide and a thermosetting polymer, the non-conductive substrate being directly coated by the paint, a method for the manufacture of this coated non-conductive substrate, methods for detecting leaks or strain deformation and the uses of said coated non-conductive substrate.

Abstract: A pre-coated steel strip is provided. The steel strip includes a strip of base steel having a length, a width, a first side, and a second side. The length of the strip is at least 100 m and the width is at least 600 mm. An aluminum or an aluminum alloy pre-coating is on at least part of at least one of the first or second sides of the strip of base steel. A thickness tp of the pre-coating is from 20 to 33 micrometers at every location on at least one of the first or second sides. Processes, coated stamped products and land motor vehicles are also provided.

Abstract: A method for the manufacture of reduced graphene oxide from electrode graphite scrap including the provision of the graphite electrode scrap, the grinding of electrode graphite scrap to obtain ground graphite electrode, an oxidation step of the ground graphite electrode to obtain graphene oxide and the reduction into reduced graphene oxide.

Abstract: The present invention provides a method of dynamical adjustment for manufacturing a thermally treated steel sheet.

Abstract: A cold rolled heat treated steel sheet having a composition with the following elements, expressed in percentage by weight 0.1%?Carbon?0.5%, 1%?Manganese?3.4%, 0.5%?Silicon?2.5%, 0.03%?Aluminum?1.5%, 0%?Sulfur?0.003%, 0.002%?Phosphorus?0.02%, 0%?Nitrogen?0.01% and can contain one or more of the following optional elements 0.05%?Chromium?1%, 0.001%?Molybdenum?0.5%, 0.001%?Niobium?0.1%, 0.001%?Titanium?0.1%, 0.01%?Copper?2%, 0.01%?Nickel?3%, 0.0001%?Calcium?0.005%, 0%?Vanadium?0.1%, 0%?Boron?0.003%, 0%?Cerium?0.1%, 0%?Magnesium?0.010%, 0%?Zirconium?0.010%, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet having in area fraction, 10 to 30% Residual Austenite, 50 to 85% Bainite, 1 to 20% Quenched Martensite, and less than 30% Tempered Martensite.

Abstract: A method for the manufacture of an assembly of at least two metallic substrates spot welded together through at least one spot welded joint, such method including two steps, the assembly obtainable according to this method and the use of this assembly for the manufacture of automotive vehicle.

Abstract: A cold-rolled and heat-treated steel sheet, has a composition comprising, by weight percent: n0.10%?C?0.25%, 3.5%?Mn—?6.0%, 0.5%?Si?2.0%, 0.3%?Al?1.2%, with Si+Al?0.8%, 0.10%?Mo?0.50%, S?0.010%, P?0.020%, N?0.008%. The cold-rolled steel sheet has a microstructure consisting of, in surface fraction: between 10% and 45% of ferrite, having an average grain size of at most 1.3 ?m, the product of the surface fraction of ferrite by the average grain size of the ferrite being of at most 35 ?m %, between 8% and 30% of retained austenite, the retained austenite having an Mn content higher than 1.1*Mn %, Mn % designating the Mn content of the steel, at most 8% of fresh martensite, at most 2.5% of cementite and partitioned martensite.

Abstract: A method for producing a part includes providing a first and a second precoated sheet (1,2), butt welding the first and second precoated sheets (1) to obtain a blank (15), and heating the blank (15) to a heat treatment temperature at least 10° C. lower than the full austenitization temperature of the weld joint (22) and at least 15° C. higher than a minimum temperature Tmin: T min ? ( ° ? ? C . ) = AC ? ? 3 ? ( WJ ) - ? IC max 100 ? ( Ac ? ? 3 ? ( WJ ) - 673 - 40 × Al ) .

Abstract: A method for the manufacture of a galvannealed steel sheet including the provision of a specific steel sheet, a recrystallization annealing with specific heating, soaking and cooling sub-steps using an inert gas, a hot-dip galvanizing and an alloying treatment; the galvannealed steel sheet and the use of the galvannealed steel sheet.

Abstract: A hot rolled plate or forging of an austenitic steel not susceptible to relaxation cracking is provided. The hot rolled plate or austenitic steel includes a composition having in percentages by weight: 0.019%?C?0.030%, 0.5%?Mn?2%, 0.1%?Si?0.75%, Al?0.25%, 18%?Cr?25%, 14%?Ni?17%, 1.5%?Mo?3%, 0.001%?B?0.008%, 0.25%?V?0.35%, 0.23%?N?0.27%, the balance being iron and unavoidable impurities, Ni(eq.)?1.11 Cr(eq.)?8.24, Cr(eq)=Cr+Mo+1.5Si+5V+3Al+0.02, Ni(eq)=Ni+30C+x(N?0.045)+0.87; x=30 for N?0.2, x=22 for 0.2<N?0.25, x=20 for 0.25<N?0.35.

Abstract: A method to determine the crater end location of a cast metal product during its casting, the crater end location being the location at which the cast metal product becomes fully solidified. A continuous casting method and a continuous casting machine are also provided.

Abstract: The invention relates to a method for pickling steel sheets 8, the steel sheets being continuously dipped in a pickling bath 1, containing a pickling solution 10, the bath being connected to a treatment unit including a recirculation tank 3, circulators 12 and 13, a continuous entering flow 11 of the solution being fed into an ultrafiltration device 2 from the recirculation tank 3 and two flows exiting the ultrafiltration device, one filtered exiting flow 21 being then fed back inside the recirculation tank 3 and one unfiltered flow 22, the treatment unit including no storage tank.

Abstract: A method for collecting mill scale from a hot rolling mill is provided. The hot rolling mill includes a flume. The method includes transporting mill scale particles in wastewater, retrieving the wastewater from a flume of the hot rolling mill and separating the mill scale particles from the wastewater using a separator. A hot rolling mill and a method for retrofitting a hot rolling mill are also provided.

Abstract: A steel strip annealing furnace with a dew point control system. The furnace/control system can be more readily controlled to the desired dew point than the prior art control system and can handle the set point changes required as different types of steel coils are continuously run therethrough.

Abstract: A method for producing a coated steel sheet having a tensile strength TS of at least 1100 MPa, a total elongation TE according to ISO standard 6892-1 of at least 12%, the product TSxTE of the tensile strength by the total elongation being at least 14200 MPa %, and a hole expansion ratio HER according to ISO standard 16630:2009 of at least 25%, the method including the following successive steps: providing a cold-rolled steel sheet, the chemical composition of the steel containing in weight %: 0.15%?C?0.23%, 2.0%?Mn?2.7%, with C+Mn/10?0.420%, 0?Cr?0.40%, with Mn+Cr?2.25%, 0.2%?Si?1.6%, 0.02%?Al?1.2%, with 1.0%?Si+Al?2.2%, 0?Nb?0.035%, 0?Mo?0.1%, the remainder being Fe and unavoidable impurities, annealing the steel sheet at an annealing temperature TA so as to obtain a structure comprising at least 65% of austenite and at most 35% of intercritical ferrite, quenching the sheet from a temperature of at least 600° C. at a cooling rate comprised between 20° C./s and 50° C.