Abstract: The surface-treated steel includes: a steel; a plated layer containing Zn or a Zn alloy formed on a surface of the steel; and a chemical conversion coating film formed on a surface of the plated layer, wherein the chemical conversion coating film contains an organosilicon compound having a siloxane bond, and P and F, and when the abundance ratio of an alkylene group and a siloxane bond in the organosilicon compound is measured by Fourier transform infrared spectroscopy (FT-IR), a ratio A1/A2 of a peak value A1 of an absorbance at 2,800 to 3,000 cm?1 indicating the alkylene group to a peak value A2 of an absorbance at 1,030 to 1,200 cm?1 indicating the siloxane bond is 0.10 to 0.75.

Abstract: A method for producing an alkyl nitrite by bringing an aqueous solution containing nitric acid and an alkanol into contact with a gas including nitrogen monoxide and thereby producing an alkyl nitrite, in which the reaction temperature is 60° C. to 100° C., is provided.

Abstract: Disclosed is an automotive terminal that can be used, for example, as an electrical contact component, such as a connector, a lead frame, or a harness plug, used in an automobile. The automotive terminal comprises a Cu plating layer formed on a surface of a stainless steel plate, and a Sn plating layer formed on the Cu plating layer, the automotive terminal being characterized in that: the amount of adhesion of the Cu plating layer is from 1.5 to 45 g/m2; the amount of adhesion of the Sn plating layer is from 1.5 to 15 g/m2; and the surface hardness of the stainless steel plate is from 200 to 400 HV.

Abstract: Disclosed is a connection component material that can be used, for example, for electrical contact components, such as connectors, lead frames, and harness plugs, used in electrical devices, electronic devices, etc. The connection component material comprises a Cu plating layer formed on a surface of a stainless steel plate, and a Sn plating layer formed on the Cu plating layer, the connection component material being characterized in that: the amount of adhesion of the Cu plating layer is from 1.5 to 45 g/m2; the amount of adhesion of the Sn plating layer is from 1.5 to 15 g/m2; and the surface hardness of the stainless steel plate is from 200 to 400 HV.

Abstract: A connecting component material used as a material constituting a connecting component, wherein the connecting component material is obtained by using a Ni-plated metal plate in which a Ni plating layer is formed on the surface of a metal plate, and the average depth (R) of a surface roughness motif in at least one direction on the surface of the Ni plating layer is 1.0 ?m or above, and by forming a Sn plating layer having a thickness of 0.3 to 5 ?m on the Ni plating layer of the Ni-plated metal plate; the connection component material makes it possible to reduce friction and minimize abrasion of the material when a connecting component such as an electrical connection terminal is fitted, and to improve the reliability of a stable electrical connection; and the connecting component material can be used in e.g., electrical contact components such as lead frames, harness plugs, and connectors used in electrical and electronic devices and the like.

Abstract: An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand, wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an Al2O3 component.

Abstract: A tin-plated stainless steel sheet which has a tin plating layer having good adhesion to a stainless steel sheet and exhibits excellent whisker resistance in various environments, and wherein a nickel plating layer having a thickness of 0.3-3 ?m is formed on a stainless steel sheet, and a tin plating layer having a thickness of 0.3-5 ?m is formed on the nickel plating layer. This tin-plated stainless steel sheet is characterized in that nickel crystals in the nickel plating layer have a lattice distortion of 0.5% or less.

Abstract: A tin-plated stainless steel sheet which has a tin plating layer having good adhesion to a stainless steel sheet and exhibits excellent whisker resistance in various environments, and wherein a nickel plating layer having a thickness of 0.3-3 ?m is formed on a stainless steel sheet, and a tin plating layer having a thickness of 0.3-5 ?m is formed on the nickel plating layer. This tin-plated stainless steel sheet is characterized in that nickel crystals in the nickel plating layer have a lattice distortion of 0.5% or less.

Abstract: A connecting component material used as a material constituting a connecting component , wherein the connecting component material is obtained by using a Ni-plated metal plate in which a Ni plating layer is formed on the surface of a metal plate, and the average depth (R) of a surface roughness motif in at least one direction on the surface of the Ni plating layer is 1.0 ?m or above, and by forming a Sn plating layer having a thickness of 0.3 to 5 ?m on the Ni plating layer of the Ni-plated metal plate; the connection component material makes it possible to reduce friction and minimize abrasion of the material when a connecting component such as an electrical connection terminal is fitted, and to improve the reliability of a stable electrical connection; and the connecting component material can be used in e.g., electrical contact components such as lead frames, harness plugs, and connectors used in electrical and electronic devices and the like.

Abstract: An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand, wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an Al2O3 component.

Abstract: A terminal (1) comprising a connecting portion (15) to be connected to a connecting portion (5) of a mating terminal (3), wherein the connecting portion (15) includes a portion of a base material (19) including iron or an iron-based alloy and having a fine asperity (25) on a surface of the portion of the base material (19), a first layer (21) formed on a surface of at least the portion of the base material (19) included in the connecting portion (15) and having a surface formed into the fine asperity pattern, and a second layer (23) formed on the surface of the first layer (21), wherein the first layer (21) is provided for connecting the base material (19) and the second layer (23) to each other, and has higher hardness than the second layer (23), and the second layer (23) is provided for enhancing conductivity and lubrication property.

Abstract: A terminal (1) comprising a connecting portion (15) to be connected to a connecting portion (5) of a mating terminal (3), wherein the connecting portion (15) includes a portion of a base material (19) including iron or an iron-based alloy and having a fine asperity (25) on a surface of the portion of the base material (19), a first layer (21) formed on a surface of at least the portion of the base material (19) included in the connecting portion (15) and having a surface formed into the fine asperity pattern, and a second layer (23) formed on the surface of the first layer (21), wherein the first layer (21) is provided for connecting the base material (19) and the second layer (23) to each other, and has higher hardness than the second layer (23), and the second layer (23) is provided for enhancing conductivity and lubrication property.