Abstract: Provided is an aluminum alloy element for a slide fastener, which has improved strength and abrasion resistance. The element for the slide fastener includes a base material of an aluminum alloy having a composition represented by a general formula: AlaSibCucMgdTieBf in which a, b, c, d, e and f each represents % by mass; a is a balance; 0.2?b?0.8, 0.8?c?1.8, 0.8?d?1.8, 0<e?0.05, and 0<f?0.01; and unavoidable impurity elements may be contained; the aluminum alloy comprising, dispersed therein, precipitates containing at least one element selected from a group consisting of Al, Si, Cu and Mg, the element for the slide fastener comprising a pair of leg portions and a head portion that connects the pair or leg portions and comprises a convex portion and a concave portion for engagement.

Abstract: Elements for a slide fastener are provided, which have high strength and improved abrasion resistance. More particularly, an element for a slide fastener includes as a base material, an aluminum alloy having a composition represented by a general formula: AlaSibCucMgd in which a, b, c and d are expressed in percentage by mass, a denotes a balance, 0.4?b?0.9, 0.15?c?0.8, 0.8?d?2.0, and unavoidable impurity elements may be contained; and the aluminum alloy containing a precipitate containing Mg and Si.

Abstract: A copper alloy for fastening wherein the alloy has a structure of a mixture of ?-phase and a ?-phase; and wherein the alloy has a composition represented by the general formula: Cubal.ZnaMnb, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34?a?40.5, 0.1?b?6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b?(?8a+300)/7, where 34?a<37.5 and equation (2): b?(?5.5a+225.25)/5, where 35.5?a?40.5.

Abstract: A metallic fastener member has a specific color of light gold and also has high strength, discoloration resistance and high workability to withstand practical use. A metallic fastener member including a base material of a copper alloy having composition containing 1 to 30% by mass of Zn and 1 to 11% by mass of Ni, the balance being Cu and inevitable impurities, wherein the metallic fastener member has a Vickers hardness of Hv 120 or more and less than Hv 220.

Abstract: Elements for a slide fastener are provided, which have high strength and improved abrasion resistance. More particularly, an element for a slide fastener includes as a base material, an aluminum alloy having a composition represented by a general formula: AlaSibCucMgd in which a, b, c and d are expressed in percentage by mass, a denotes a balance, 0.4?b?0.9, 0.15?c?0.8, 0.8?d?2.0, and unavoidable impurity elements may be contained; and the aluminum alloy containing a precipitate containing Mg and Si.

Abstract: Provided is a metallic fastener member which has a specific color, i.e., a light gold color, and has all of practical strength, unsusceptibility to discoloration, and processability. The metallic fastener member comprises, as the base material, a copper alloy having a composition which contains 1-30 mass % Zn and 1-11 mass % Ni, with the remainder comprising Cu and unavoidable impurities, and has a Vickers hardness of 120 Hv or greater but less than 220 Hv.

Abstract: A copper alloy for fastening wherein the alloy has a structure of a mixture of ?-phase and a ?-phase; and wherein the alloy has a composition represented by the general formula: Cubal.ZnaMnb, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34?a?40.5, 0.1?b?6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b?(?8a+300)/7, where 34?a<37.5 and equation (2): b?(?5.5a+225.25)/5, where 35.5?a?40.5.

Abstract: A copper-zinc alloy product of the invention contains zinc in an amount of higher than 35% by weight and 43% by weight or less and has a two-phase structure of an ?-phase and a ?-phase. Further, the ratio of the ?-phase in the copper-zinc alloy is controlled to be higher than 10% and less than 40% and the crystal grains of the ?-phase and the ?-phase are crushed into a flat shape and arranged in a layer shape through cold working. According to the copper-zinc alloy product, it is possible to decrease the copper content and to appropriately secure the strength and cold workability by appropriately controlling the ratio of the ?-phase.

Abstract: A copper-zinc alloy product of the invention contains zinc in an amount of higher than 35% by weight and 43% by weight or less and has a two-phase structure of an ?-phase and a ?-phase. Further, the ratio of the ?-phase in the copper-zinc alloy is controlled to be higher than 10% and less than 40% and the crystal grains of the ?-phase and the ?-phase are crushed into a flat shape and arranged in a layer shape through cold working. According to the copper-zinc alloy product, it is possible to decrease the copper content and to appropriately secure the strength and cold workability by appropriately controlling the ratio of the ?-phase.

Abstract: A button comprises a button body (10, 10a, 10b) and a prong (20, 20a, 20b) adapted to be arranged on the side of cloth (30) opposite to the side thereof on which the button body mentioned above is set in place to nip the cloth therebetween and to fixedly secure the button body to the cloth. The button body mentioned above contains an outer shell member (13), which comprises a button back (15, 15a, 15b) and a cap (14, 14a, 14b), and an insert (11, 11a, 11b) accommodated in the outer shell member. In order to make a whitish button which could be heretofore obtained only by plating, at least the button back mentioned above is made of aluminum or an aluminum alloy. Preferably, the button back mentioned above is made of an aluminum alloy containing 3-6% by weight of magnesium, and the cross-sectional thickness of the above-mentioned button back is in the range of 0.25-0.6 mm. Further, it is desirable that the above-mentioned cap and the insert should also be made of an aluminum alloy.

Abstract: A button comprises a button body (10, 10a, 10b) and a prong (20, 20a, 20b) adapted to be arranged on the side of cloth (30) opposite to the side thereof on which the button body mentioned above is set in place to nip the cloth therebetween and to fixedly secure the button body to the cloth. The button body mentioned above contains an outer shell member (13), which comprises a button back (15, 15a, 15b) and a cap (14, 14a, 14b), and an insert (11, 11a, 11b) accommodated in the outer shell member. In order to make a whitish button which could be heretofore obtained only by plating, at least the button back mentioned above is made of aluminum or an aluminum alloy. Preferably, the button back mentioned above is made of an aluminum alloy containing 3-6% by weight of magnesium, and the cross-sectional thickness of the above-mentioned button back is in the range of 0.25-0.6 mm. Further, it is desirable that the above-mentioned cap and the insert should also be made of an aluminum alloy.

Abstract: An Ni-free white copper alloy of formula CuaZnbTic or CuaZnbTicXd wherein X is at least one element selected from the group consisting of Al, Sn, Ag and Mn, b, c and d are, in mass %, 0.5≦b≦30, 1≦c≦7 and 0.1≦d≦4, and a is the balance, with unavoidable elements, and also a producing method therefor, comprising: preparing a material alloy for the above white copper alloy; heating the alloy to 700 to 885° C.; and cooling the alloy. The Ni-free white copper alloy has a strength and excellent hardness comparable to those of nickel silver, as well as excellent workability, corrosion resistance and whiteness in addition to ductility, and is free from an Ni allergy problem because of containing no nickel, and moreover tends not to cause needle detectors to malfunction.

Abstract: A nickel-free white copper alloy material, wherein a white coating layer containing no Ni is formed on a base material composed of an alloy represented by the general formula: CuaZnbMnc MdXe, wherein M is at least one element selected from the group consisting of Al and Sn; X is at least one element selected from the group consisting of Si, Ti and Cr; b, c, d and e are 0≦b≦22, 7≦c≦20, 0≦d≦5 and 0≦e≦0.3 in terms of % by weight; and a is the balance, the alloy incidentally including unavoidable elements. The white copper alloy material has excellent strength and hardness equal to those nickel silver, as well as excellent workability, corrosion resistance and whiteness in addition to ductility, and has no fear of allergic reactions because of containing no Ni. In the white copper alloy material, fine adjustment of its white hue is possible according to the demand of customers, and satisfactory mechanical properties can be obtained with the desired hue.

Abstract: A nickel-free white copper alloy represented by the general formula: CuaZnbMncAld or CuaZnbMncAldXe, wherein X is at least one element selected from the group consisting of Si, Ti and Cr; b, c, d and e are 0.5≦b<5, 7≦c≦17, 0.5≦d≦4 and 0<e≦0.3 in terms of % by weight; a is the balance, the alloy incidentally including unavoidable elements. The alloy is free from allergic problems, which may be caused by nickel, and has excellent strength, hardness, ductility, workability and corrosion resistance, suitable for use in elements, sliders, stoppers or the like for slide fasteners, or accessories such as metallic buttons, fasteners or the like for clothes.

Abstract: A nickel-free white or yellowish copper alloy having excellent corrosion resistance, with high degree of whiteness or yellowness, which is non-allergenic and therefore is suitable for use, for example, in elements, sliders, stoppers and the like for a slide fastener. The alloy consists of a composition represented by the general formula I: Cu.sub.w Zn.sub.x Mn.sub.y (Al and/or Sn).sub.z wherein w, x, y and z denote weight percentages that are within the ranges of 70.ltoreq.w.ltoreq.85, 5.ltoreq.x.ltoreq.22, 7<y.ltoreq.15, and 0<z.ltoreq.4, or by the general formula II: Cu.sub.w Zn.sub.x Mn.sub.y (Al and/or Sn).sub.z wherein w, x, y and z denote weight percentages that are within the ranges of 70.ltoreq.w.ltoreq.85, 10.ltoreq.x.ltoreq.25, 0<y.ltoreq.7, and 0<z.ltoreq.3, wherein both the above alloys could contain other unavoidable elements. The alloy is in a single .alpha.-phase state at room temperature.