The invention relates to a method for manufacturing a plate material which is used in the electrochemical process of metal as a part of a cathode on which surface a metal is deposited. The surface roughness of the plate material for the adhesion between the metal deposit and the plate material is achieved with at least one treatment in a coil processing line.

A steel sheet for hot pressing which contains, in mass %, C: 0.15% or more to 0.40% or less, Si: 1.00% or more to 2.00% or less, Mn: 1.50% or more to 3.00% or less, Ti: (N48/14)% or more to 0.10% or less, B: 0.0005% or more to 0.0050% or less, Al: more than 0% to 0.10% or less, P: more than 0% to 0.05% or less, S: more than 0% to 0.01% or less, N: more than 0% to 0.010% or less, iron and inevitable impurities. This steel sheet for hot pressing is also characterized by having a dislocation density of 1010.sup.14/m.sup.2 or more, an area ratio of pearlite relative to the whole structure being 30% or more, and a tensile strength of 1100 MPa or less.

A high strength galvanized steel sheet that has a tensile strength (TS) of 780 MPa or higher and excellent bendability, fatigue resistance, and surface appearance quality and a method for producing the high strength galvanized steel sheet. The steel sheet includes, at a position of a thickness of the steel sheet, 5% or more and 80% or less of a ferrite phase in terms of area fraction, 20% or more and 70% or less of a martensite phase in terms of area fraction, and 0% or more and 25% or less of a bainite phase in terms of area fraction.

A cold formed beam formed from a single sheet of steel having an upper member and a lower member (e.g., square, rectangular, other shape) separated by a web. The web may include stamped apertures and/or embossments around at least a portion of the stamped apertures. The cold formed beam may include beam connections that operatively couple the ends of the steel sheet used to form the beam to a portion of the beam (e.g., the web). The beam connections may by interference connectors formed from deformation of two or more layers of beam (e.g., clinching, or the like). Among other benefits, forming the cold formed beam from a single sheet, stamping of the web, and/or the using deformation connections (e.g., clinching, or the like) of the ends of the sheet allows for the pre-coating (e.g., galvanized, painting, or the like) of the sheet before the forming.

There is provided a manufacturing method of martensite-based stainless steel for edged tools, which can decrease the number of passes during final cold rolling thereby to improve productivity. In the manufacturing method of martensite-based stainless steel for edged tools having a thickness of 0.1 mm or less by cold rolling, the final cold rolling is performed under condition of a diameter of a work roll of 100 to 130 mm, a cold rolling speed of more than 120 and not more than 200 m/min, and a lubricating oil viscosity of 30 to 40 mm.sup.2/s. Preferably, the cold rolling speed is 150 to 190 m/min, and the lubricating oil viscosity is 33 to 39 mm.sup.2/s.

An aluminium strip for manufacturing a package of a solid, liquid or gaseous product consisting of an aluminium alloy. The aluminium strip has at least a one-sided or two-sided antibacterial coating. The object of proposing an aluminium strip consisting of an aluminium alloy with at least a one-sided or two-sided antibacterial coating, which can be more easily produced with very good antibacterial effect of the coating and can already provide very good antibacterial properties at extremely low concentrations of the antibacterial substance, is achieved by the antibacterial coating containing ZnMoO.sub.4 as the antibacterial substance.

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 amountsMo0.5% 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.

An aluminum alloy plate for a magnetic disk substrate with a flat and smooth ground surface, a production method by which the aluminum alloy plate can be produced at low cost and a magnetic disk are shown. An aluminum alloy plate for a magnetic disk substrate which comprises an aluminum alloy containing Mg: 3.0 to 8.0 mass % (hereinafter %), Cu: 0.005 to 0.150%, Zn: 0.05 to 0.60%, Cr: 0.010 to 0.300%, Fe: 0.001 to 0.030%, Si: 0.001 to 0.030%, (Ti+V+Zr): 0.0010 to 0.0100%, B: 0.0001 to 0.0010% with a balance being Al and inevitable impurities, wherein the density of a TiVBZr-based inclusion having a maximum diameter exceeding 5 m is 0 piece/6000 mm.sup.2 and the density of a TiVBZr-based inclusion having a maximum diameter of 3 to 5 m is 1 piece/6000 mm.sup.2 or less; a production method thereof; and a method for producing a magnetic disk.

A method of manufacturing a brazing sheet includes layering at least a core-material slab composed of an aluminum material and a filler-material slab composed of an AlSi series alloy to prepare a clad slab. At least one aluminum slab in the clad slab, which is disposed in a range from the core-material slab to the filler-material slab inclusive, contains a metal element that oxidizes more readily than Al. The clad slab is hot rolled to prepare a clad sheet that includes a core material composed of the core-material slab and a filler material composed of the filler-material slab. Then, one or more passes of cold rolling is performed on the clad sheet. Between passes of cold rolling or after completion of the cold rolling, at least one surface of the clad sheet is etched using an alkaline etching solution having a sodium hydroxide concentration of 0.05-1.0 mass %.

A method for manufacturing the high strength steel sheet having excellent formability includes hot-rolling a steel slab having a chemical composition containing, by mass %, C: 0.03% or more and 0.35% or less, Si: 0.5% or more and 3.0% or less, Mn: 3.5% or more and 10.0% or less, P: 0.1% or less, S: 0.01% or less, N: 0.008% or less and the balance comprising Fe and inevitable impurities, coiling the hot-rolled steel sheet at a temperature range of the Ar.sub.1 transformation point to the Ar.sub.1 transformation point+(the Ar.sub.3 transformation pointthe Ar.sub.1 transformation point)/2, cooling the coiled steel sheet down to 200 C. or lower, heating and holding the cooled steel sheet at a temperature range of the Ac.sub.1 transformation point200 C. to the Ac.sub.1 transformation point for 30 minutes or more, pickling the heated steel sheet, cold-rolling the pickled steel sheet under the condition that the rolling reduction is 20% or more, and heating and holding the cold-rolled steel sheet at a temperature range of the Ac.sub.1 transformation point to the Ac.sub.1 transformation point+(the Ac.sub.3 transformation pointthe Ac.sub.1 transformation point)/2 for 30 seconds or more.