GB/T 12304-1990 《Chemical analysis methods for silicomanganese alloy》 Related products

GB/T 12304-1990 "JINHE Gold Alloy Platings for Metal Overlay Engineering" standard specifies the technical requirements for gold and gold alloy platings on metal and Non-metallic materials. It is suitable for electrical, electronic and other engineering fields, but does not cover platings on threads and unformed materials. The standard equivalent adopts the international standard ISO 4523-1985 and references a number of related standards, including platings thickness, Hardness, bonding strength and other test methods. The standard specifies the composition, thickness, Appearance, Hardness, bonding force and other technical indicators of platings in detail to ensure the excellent performance of platings in function and Appearance.