Abstract: A sound-absorbing material, wherein a non-woven fabric with a mass per unit area of 150 to 800 g/m2 and a bulk density of 0.01 to 0.2 g/cm3 and a surface material with an air permeability of not more than 50 cc/cm2/sec measured according to JIS L-1096 are layered.

Abstract: A sound-absorbing material, wherein a non-woven fabric with a mass per unit area of 150 to 800 g/m2 and a bulk density of 0.01 to 0.2 g/cm3 and a surface material with an air permeability of not more than 50 cc/cm2/sec measured according to JIS L-1096 are layered.

Abstract: The cladding material 10 comprises a metal substrate 1, an expanded metal mesh 3 placed on the metal substrate 1 and a corrosion resistant metal lining 4 is placed in contact with the metal mesh 3 in opposition to the metal substrate 1 with the metal mesh 3 inbetween. A metal mesh layer placed on said metal substrate 1 may comprise an expanded metal whose openings are formed by making staggered cuts in a metal plate over the whole part thereof so that each cut passes through the thickness of said metal plate, and expanding said metal plate in a direction intersecting the length of said cuts thereby opening each cut.

Abstract: The cladding material 10 comprises an Fe-based metal substrate 1 consisting of Fe or an Fe-alloy, a Ni-based metal layer 2 placed on the Fe-based metal substrate 1 and a metal mesh 3 placed on the Ni-based metal layer 2 in opposition to the Fe-based metal substrate 1 with the Ni-based metal layer 2 inbetween. Furthermore, a corrosion resistant metal lining 4 is placed in contact with the metal mesh 3 in opposition to the Ni-based metal layer 2 with the metal mesh 3 inbetween. The Fe-based metal substrate 1, the Ni-based metal layer 2, the metal mesh 3 and the metal lining 4 are bonded together by seam welded portion 8, which is provided in a planer or a linear form by using roller electrodes 6. The metal lining 4 consists of a metal whose main component is the one selected from Ti, Zr, Nb, Ta and Ni, or consisting of a stainless steel.

Abstract: A clad piece comprising a surface layer and a liner. the surface layer consisting of a highly corrosion-resistant metal thin sheet and superposed on the liner, and the surface layer and the liner having been united into a laminated unitary body, can be easily produced by spot welding or seam welding, and can be advantageously used for the lining of tank wall and other chemical apparatuses.

Abstract: A clad steel plate having a sandwich structure obtained by sandwiching a thin copper sheet and a stainless steel net between a plate of steel such as carbon steel, alloy steel or the like and an anticorrosive plate of metal such as titanium, tantalum, niobium, zirconium or the like, wherein the steel plate and anticorrosive metal plate are bonded to each other through the net and thin copper sheet by local welding between mutual portions to be joined. The clad steel plate can be produced cheaply and simply, and has excellent electrical and heat conductivities.