An alloy with the composition (in mass-%): C: max. 0.02%; S: max. 0.01%; N: max. 0.03%; Cr: 20.0-23.0%; Ni: 39.0-44.0%; Mn: 0.4-<1.0%; Si: 0.1-<0.5%; Mo: >4.0-<7.0%; Nb: max. 0.15%; Cu: >1.5-<2.5%; Al: 0.05-<0.3%; Co: max. 0.5%; B: 0.001-<0.005%; Mg: 0.005-<0.015%; Fe: the rest, as well as smelting related impurities, is further processed as an alloyed solid in the form of wire, strip, rod or powder via the molten phase and is used in the field of wet corrosion applications in the oil and gas as well as the chemical industry.

The invention relates to an alloy based on iron comprising, by weight: 35%Ni37% trace amountsMn0.6% trace amountsC0.07% trace amountsSi0.35% trace amountsCr0.5% trace amountsCo0.5% trace amountsMo<0.5% trace amountsS0.0035% trace amountsO0.0025% 0.011%[(3.138Al+6Mg+13.418Ca)(3.509O+1.770S)]0.038% 0.0003%<Ca0.0015% 0.0005%<Mg0.0035% 0.0020%<Al0.0085%
the remainder being iron and residual elements resulting from the elaboration.

A method for laser welding of one or more workpieces made from press hardenable steel, in a butt joint, in which the workpiece or the workpieces have a thickness of at least 1.8 mm and/or a jump in thickness of at least 0.4 mm arises at the butt joint including supplying filler wire into a molten bath generated by a laser beam. In order to ensure that the weld seam can reliably harden into a martensitic structure during the hot forming (press hardening), the filler wire contains at least one alloy element from the group of manganese, chromium, molybdenum, silicon and nickel, wherein the at least one alloy element is present in the filler wire with a mass proportion that is larger by .Iadd.at least .Iaddend.0.1% by weight than the mass proportion of the element in the press hardenable steel of the workpiece or the workpieces.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable that forms a weld deposit on a steel workpiece during an arc welding operation, wherein the welding consumable comprises: less than 0.4 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron, wherein the grain control agents comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable, wherein the weld deposit comprises a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility, as measured by percent elongation, that is at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at 20 F., and wherein the welding consumable provides a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.

The present invention relates to a method for arc-welding a steel plate having a C content of 0.08-0.30% by mass, wherein the arc welding method comprises welding under a condition whereby X represented by formula (1) is 200 or less using a welding wire in which the total content of Cr and Ni thereof is 1.00% by mass or greater. (1): X=0.8(300-279[C].sub.W-25[Si].sub.W-35[Mn].sub.W-49[Ni].sub.W-47[Cr].sub.W-61[Mo].sub.W) +0.2(300-279[C].sub.BM-25[Si].sub.BM-35[Mn].sub.BM-49[Ni].sub.BM-47[Cr].sub.BM-61[Mo].sub.BM) (where [C].sub.W, [Si].sub.W, [Mn].sub.W, [Ni].sub.W, [Cr].sub.W, [Mo].sub.W, [C].sub.BM, [Si].sub.BM, [Mn].sub.BM, [Ni].sub.BM, [Cr].sub.BM, and [Mo].sub.BM are defined in the specification).

A method for producing a tailor-made semi-finished sheet metal product where two steel sheets of different material grades and/or thicknesses are joined by laser welding. At least one of the sheets is press-hardenable steel having a metallic coating of aluminium or aluminium-silicon. Filler wire is fed into the weld melt. The filler wire is substantially free of aluminium and contains at least one alloy element which promotes the formation of austenite in a content that is at least 0.1 wt. % greater than that in the press-hardenable steel. The filler wire is heated before being fed into the weld melt. The steel sheets have a gap delimited by the edges of the sheets having an average width of at least 0.15 mm. The ratio of the volume of filler wire inserted into the gap to the volume of the steel sheet material melted by the laser beam is at least 20%.

A steek suitable for structural components used in contact with liquid lead or liquid lead alloys in nuclear reactors consisting of in weight % (wt. %): C 0.02-0.09; Si 0.1-1.6; Mn 1.5-3.0; Cr 9.0-12.0; Ni 10.0-16.8; Al 2.0-3.4; Ti 0.1-1.0; Nb?0.5; V?0.5; Ta?1.5; Y?0.5; Mo?1.5; W?1.5; Cu?1.7; N?0.06; Co?1.0; B?0.1; Zr?0.5; Hf?0.5; RE?0.2; Ca?0.1; Mg?0.1; Bi?0.1; SE?0.1 and balance Fe apart from impurities, wherein the content of RE does not include the amount of Y but only the amount of the elements having an atomic numbers 21 and 57-71, wherein the steel fulfils one or more of the following requirements: Cr.sub.Eq=18.5-21 and Ni.sub.Eq=11-20 wherein Cr.sub.Eq=Cr+3Al+2Si+1.5[(Ti+Nb+V+Ta+Zr)?4.5(C+N)] and Ni.sub.Eq=Ni+0.5((Mn+Cu+Co). 5-25 volume % delta ferrite.

The present application discloses a wire rod for gas shielded welding wire, comprising the following chemical elements in mass percentage: C0.03%, Mn: 0.20-0.70%, Si: 0.20-0.60%, Ni: 1.6-2.7%, Cr: 1.60-2.20%, Cu: 0.15-0.35%, Ti: 0.01-0.07% and the balance being Fe and inevitable impurities. The present application further discloses a gas shielded welding wire which is made of the above wire rod for gas shielded welding wire. The comprehensive mechanical properties and corrosion resistance of the deposited metal, after the gas shielded welding wire with high weather resistance and low strength is welded, are comparable to those of S350EW (i.e., the welding base material). Moreover, the welding wire has a wide range of processing properties, which can be used for both hot-rolled and cold-rolled sheets

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.