Abstract: This invention is intended for providing a soft magnetic steel material having excellent DC magnetization properties and corrosion resistance, and capable of being manufactured at a low cost, and a method of manufacturing the same.The soft magnetic steel material of this invention contains 0.8 to 3.5% by weight of soluble aluminum, as well as limited amounts of C, total nitrogen, Si, Mn, P, S and total oxygen, and has an average ferrite crystal diameter of which the minimum has a specific relation to the thickness or diameter of the material. The material has a surface covered densely with aluminum oxide particles having a diameter of 0.01 to 5 microns. It exhibits a coercive force not exceeding 0.4 Oe in the absence of any strain and a magnetic flux density of 15,000 G or more at a magnetomotive force of 25 Oe. The aluminum oxide particles formed on the surface of the material are preferably formed with a density of 1.times.10.sup.12 to 1.times.10.sup.16 particles, or more preferably 1.times.10.sup.13 to 1.

Abstract: It is an object to provide a vibration-damping alloy which has a high power of damping vibration and can be used to make components of a structure, machine, etc. and reduce effectively any vibration thereof and the noise thereby produced.The vibration-damping alloy of this invention contains those proportions of Al and Si which fall within the range defined by a series of points in any of FIGS. 1 to 6, and less than 0.1 wt. % Mn, the balance of its composition being Fe and unavoidable impurities. It preferably contains more than 0.5 wt. % Si, while not containing more than 0.01 wt. % of any of C, N, O, P and S.

Abstract: It is an object to provide a vibration-damping alloy of high strength which has high strength and a high power of damping vibration and can be used to make components of a structure, machine, etc. and reduce effectively any vibration thereof and the noise thereby produced.The vibration-damping alloy of this invention contains more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined by a series of points in any of FIGS. 1 to 5, and that proportion of Mn which ranges from 0.1 wt. % to the sum of the proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities. It preferably does not contain more than 0.01 wt. % of any of C, N, O, P and S.

Abstract: An improved method of continuously casting nickel containing steel wherein the formation of surface cracks is prevented. The molten steel which is cast contains less than 0.0020% S, less than 0.0045% N, Ca in an amount of from 0.0020 to 0.0070%, Ni in an amount from 5.5 to 10%, the remainder being Fe and unavoidable impurities.

Abstract: The nonmagnetic alloy consists of 0.22-0.30% by weight of carbon, 22-28% by weight of manganese, up to 4% by weight of silicon, 0.030-0.10% by weight of sulphur, 0.001-0.008% by weight of calcium, 0.001-0.008% by weight of sol.Al and the balance of iron. If desired, either one or both of up to 2.0% by weight of chromium and up to 2.0% by weight of vanadium may be incorporated.