Gb T 8753 2 2005 Translated English Of Chinese Standard Gbt 8753 2 2005 Gb T8753 2 2005 Gbt8753 2 2005

This part specifies the method for assessing the quality of sealed anodic oxidation coatings of aluminum and aluminum alloy, after nitric acid predip AND etching in phosphoric acid / chromic acid solution, through the loss of mass. This part applies to both hot-sealed anodic oxidation coating and cold-sealed anodic oxidation coating.

This part specifies the method for assessing the quality of sealed anodic oxidation coatings, by the anti-dying adsorption ability, after acid treatment. This part is applicable to the production control inspection of anodic oxidation coating, with anti-pollution ability, which is subject to atmospheric sun-exposure or corrosive environment.

This part of GB/T 8753 specifies a method, for assessing the quality of sealed anodic oxidation coatings of aluminum and aluminum alloy, through the loss of mass, after they are etched in an acid solution.

This Standard specifies a method for simulating the release of nickel from jewellery, in order to determine whether the item releases nickel at a rate greater than 0.5 ug/(cm2-week). This Standard is applicable to the determination of the release of nickel from jewellery, as well as the products intended to come into direct and prolonged contact with the skin (see 4.3.2 of GB 11887-2002).

This standard specifies the meaning and determination of steel-parts carburizing and carbonitriding hardened-case depth. This standard is applicable to carburizing and carbonitriding hardened layer; and the parts that, when they are final-heat-treated, have a hardness of less than 450 HV at a distance of three times the case-hardened depth, from the surface. For steel-parts that can not meet the above conditions, it shall be determined in accordance with a special agreement. For steel-parts of which, at a distance of three times the hardened-case depth from the surface, the hardness is greater than 450 HV, this standard is still valid, provided that a limiting hardness value that is greater than 550 HV (in steps of 25HV) is selected for the case-hardened depth.

GB/T 20043-2005 Uninterruptible power systems (UPS) - Part 2: Electromagnetic compatibility (EMC) requirements English-translated version

This Standard specifies the classification, naming principles and naming procedures of designation, and general chemical composition, etc. for superalloys and high temperature intermetallic materials. This Standard applies to deformed superalloys, cast superalloys (isometric crystal cast superalloys, directionally solidified columnar crystal superalloys, and single crystal superalloys), superalloy wire for welding, powder metallurgy superalloys, dispersion strengthened superalloys and high temperature intermetallic materials.

This Standard specifies the meaning and determination method of effective depth of hardening (DS) of steel parts after induction or flame hardening. This Standard is applicable to parts whose effective depth of hardening is greater than 0.3 mm after induction or flame hardening.