GB/T 47350-2026 The classification and assessment for electrical contact materials

GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 2900.4-2008 Electrotechnical terminology Special alloys for electrical equipment GB/T 4324.6-2012 Methods for chemical analysis of tungsten—Part 6:Determination of iron content—1,10-phenanthroline spectrophotometry GB/T 4324.27-2012 Methods for chemical analysis of tungsten—Part 27:Determination of carbon content—High frequency combustion-infrared absorption method GB/T 5121.1-2008 Methods for chemical analysis of copper and copper alloys—Part 1:Determination of copper content GB/T 5121.27-2008 Methods for chemical analysis of copper and copper alloys—Part 27:The inductively coupled plasma atomic emission spectromertric method GB/T 5586-1998 Test methods for essential porperty of electric contact material GB/T 5586-2016 Test methods for essential property of electrical contact materials GB/T 5588-2017 Technical specification for silver-nickel,silver-iron electrical contacts GB/T 13397-2024 Technical specification for silver-metaloxide electrical contacts by alloy internal oxidation method GB/T 15072.1-2025 Methods for chemical analysis of precious metal alloys—Part 1:Determination of gold content GB/T 15072.2-2025 Method for chemical analysis of precious metal alloys—Part 2:Determination of silver content GB/T 15072.3-2025 Methods for chemical analysis of precious metal alloys—Part 3:Determination of platinum content GB/T 15072.4-2025 Methods for chemical analysis of precious metal alloys—Part 4:Determination of palladium content GB/T 15072.6-2025 Methods for chemical analysis of precious metal alloys—Part 6:Determination of iridium content GB/T 15072.8-2008 Test method of precious metal alloys—Determination of copper content for gold, palladium and silver alloys—Complexometric return titration using thiourea releasing EDTA GB/T 15072.10-2008 Test method of precious metal alloys—Determination of nickel content for gold alloys—Complexometric backing titration using EDTA GB/T 15072.13-2008 Test method of precious metal alloys—Determination of tin,cerium and lanthanium contents for silver alloys—Inductively coupled clasma atomic emission spectrometry GB/T 15072.17-2008 Test method of precious metal alloys—Determination of tungsten contents for platinum alloys—Tungstic acid gravimetry GB/T 15159-1994 Composite material strips of precious metals and their alloys GB/T 15159-2008 Composite material strips of precious metals and their alloys GB/T 15159-2020 Composite material strips of precious metals and their alloys GB/T 16921-1997 Measurement of metallic coating thickness X—ray spectrometric methods GB/T 16921-2005 Metallic coatings—Measurement of coating thickness—X-ray spectrometric methods GB/T 24268-2009 Test methods for chemical analysis of silver-tin oxide electric contact material GB/T 38145-2019 High content precious metals jewellery alloys—Determination of gold,platinum and palladium—Difference method using inductively coupled plasma optical emission spectroscopy JB/T 4107.1-2014 Electro-contact material chemical analysis methods - Part 1: General principles and guidelines JB/T 4107.1-1999 Electro-contact material chemical analysis methods: General principles and general provisions JB/T 4107.2-2014 Electro-contact material chemical analysis methods - Part 2: Determination of copper content in copper-tungsten alloys JB/T 4107.2-1999 Electro-contact material chemical analysis method - Determination of copper content in copper-tungsten (iodometric method) JB/T 4107.3-2014 JBT 4107.3-2014 Electro-contact material chemical analysis methods Part 3: Determination of carbon content in silver graphite for silver graphite material JB/T 4107.4-2014 Chemical Analysis Methods for Electrical Contacts Materials - Part 4: Determination of Silver Content in Silver-Tungsten Alloys JB/T 4107.4-1999 Electro-contact material chemical analysis method Determination of silver content in silver-tungsten (iodimetric method) JB/T 4107.5-2014 Electric contact material chemical analysis methods - Part 5: Determination of nickel content in silver-nickel alloys. (English translation only) JB/T 4107.5-1999 Electro-contact material chemical analysis method Determination of nickel content in silver-nickel (EDTA capacity method) JB/T 4107.6-2014 Electro-contact material chemical analysis methods - Part 6: Determination of iron content in silver-iron alloys JB/T 4107.6-1999 Electro-contact material chemical analysis method - Determination of iron content in silver-iron (Determination of iron content using potassium dichromate method) JB/T 4107.7-1999 Electro-contact material chemical analysis method for determination of carbon content in silver graphite (carbon content determination by gas volume capacity method) JB/T 6237.1-2008 Electro-contact material - Silver powder - Chemical analysis methods - Part 1: Silver determination by silver chloride precipitation-Diphenylthiocarbazone spectrophotometry JB/T 7774.1-2008 Test methods for chemical analysis of silver-zine oxide electric contact material-Part 1:Determination of zinc content JB/T 7775.1-2008 Copper Wear-resistant Vacuum Contacts Materials: Chemical Analysis Methods - Part 1: Determination of Copper Content by Iodometric Method JB/T 7775.2-2008 Copper-Tungsten-Carbide Vaccum Contacts Material Chemical Analysis Method - Part 2: Determination of Carbon Content by Gas Capacity Method JB/T 7776.1-2008 Silver cadmium oxide electrical contact material chemical analysis methods - Part 1: Determination of cadmium content by EDTA complex titration method JB/T 7777.1-2008 The Chemical Analysis Methods of Silver-Oxide Tin-Oxide Indium-Oxide Electro-Contact Material Part 1: Determination of Tin Content by Iodometric Method JB/T 7777.2-2008 Test methods for chemical analysis of silver-tin oxide-indium oxide electric contact material-Part 2:Determination of indium JB/T 8443.1-2014 JBT 8443.1-2014 Copper-chromium contact material chemical analysis method Part 1: Determination of chromium JB/T 8443.1-1996 Copper-chromium contact material chemical analysis method: Determination of chromium content using ferrous sulfate titration method JB/T 8443.2-2014 Chemical Analysis Methods for Copper-Chromium Contact Materials - Part 2: Determination of Copper Content JB/T 8505-2011 Copper Graphite Electrocontact Material Chemical Analysis Methods JB/T 8505-1996 Copper Graphite Electrocontact Material Chemical Analysis Method YS/T 372.1-2006 Methods for elementary analysis of precious alloy—Determination of silver content—Potentiometer titration with potassium iodide YS/T 372.4-2006 Methods for elementary analysis of precious alloy—Determination of copper content—Complexometric titration using thiourea releasing EDTA YS/T 372.10-2006 Methods for elementary analysis of precious alloy—Determination of nickel content in AuNi and PdNi alloy—EDTA complexometric titration YS/T 508-2008 Method for chemical analysis of tungsten-molybdenum alloy—The EDTA volumetric method for the determination of molybdenum content YS/T 561-2009 Method for chemical analysis of precious metals alloys—Platinum-rhodium alloys—Determination of rhodium content—Hexaammine cobalt nitrate gravimetriy YS/T 562-2009 Method for chemical analysis of precious metals alloys—Platinum-ruthenium alloys—Determination of ruthenium content—Thiourea spectrophotometry YS/T 562-2006 Method for chemical analysis of platinum-ruthenium alloys