GB/T 26330-2023 Clad metal strips of silver and silver alloys/copper and copper alloys

GB/T 26330-2010 Silver or silver alloy/copper or copper alloy clad strips

GB/T 15072.2-2025 Method for chemical analysis of precious metal alloys—Part 2:Determination of silver content GB/T 15072.3-1994 Method for chemical analysis of precious metals and their alloys—Gold, platinum and palladium alloys—Determination of platinum content GB/T 15072.3-2008 Test method of precious metal alloys—Determination of platinum content for gold,platinum and palladium alloys—Electricity titration using potassium permanganate GB/T 15072.3-2025 Methods for chemical analysis of precious metal alloys—Part 3:Determination of platinum content GB/T 15072.4-1994 Method for chemical analysis of precious metals and their alloys—Palladium, silver alloys—Determination of palladium content GB/T 15072.4-2008 Test method of precious metal alloys—Determination of palladium content for palladium and silver alloys—Butanedione dioxime gravimetry GB/T 15072.4-2025 Methods for chemical analysis of precious metal alloys—Part 4:Determination of palladium content GB/T 15072.5-1994 Method for chemical analysis of precious metals and their alloys—Gold, Palladium alloys—Determination of silver content GB/T 15072.5-2008 Test method of precious metal alloys—Determination of silver content for gold and palladium alloys—Potentionmeter titration with potassium iodide GB/T 15072.6-1994 Method for chemical analysis of precious metals and their alloys—Platinum, palladium alloys—Determination of iridium content GB/T 15072.6-2008 Test method of precious metal alloys—Determination of iridium contents for platinum, palladium alloys—Electricity titration with ferrous sulfate GB/T 15072.6-2025 Methods for chemical analysis of precious metal alloys—Part 6:Determination of iridium content GB/T 15072.7-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of chromium content GB/T 15072.7-2008 Test methods of precious metal alloys—Determination of chromium and iron contents for gold alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.8-1994 Method for chemical analysis of precious metals and their alloys—Gold,palladium and silver alloys—Determination of copper 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 15072.9-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of indium content GB/T 15072.9-2008 Test method of precious metal alloys—Determination of indium content for gold alloys—Complexometric return titration using EDTA GB/T 15072.10-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of nickel content 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 15072.11-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of gadolinium content GB/T 15072.11-2008 Test method of precious metal alloys—Determination of gadolinium and beryllium contents for gold alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.12-1994 Method for chemical analysis of precious metals and their alloys—Silver alloys—Determination of vanadium content GB/T 15072.12-2008 Test method of precious metal alloys—Determination of nickel contents for silver alloys—Hydrogen peroxide spectrophotometry GB/T 15072.13-1994 Method for chemical analysis of precious metals and their alloys—Silver alloy—Determination of cerium content 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 15072.14-1994 Method for chemical analysis of precious metals and their alloys—Silver alloys—Determination of aluminium content GB/T 15072.14-2008 Test method of precious metal alloys—Determination of aluminium and nickel contents for silver alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.15-1994 Method for chemical analysis of precious metals and their alloys—Gold, silver and palladium alloys—Determination of nickel, zinc and manganese contents GB/T 15072.15-2008 Test method of precious metal alloys—Determination of nickel,zinc and manganese contents for gold,silver and palladium alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.16-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of copper and manganese contents GB/T 15072.16-2008 Test method of precious metal alloys—Determination of copper and manganese contents for gold alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.17-1994 Method for chemical analysis of precious metals and their alloys—Platinum alloys—Determination of tungsten content GB/T 15072.17-2008 Test method of precious metal alloys—Determination of tungsten contents for platinum alloys—Tungstic acid gravimetry GB/T 15072.18-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of iron content GB/T 15072.18-2008 Test method of precious metal alloys—Determination of zirconium and gadolinium contents for gold alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.19-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of chromium content GB/T 15072.19-2008 Test method of precious metal alloys—Determination of vanadium and magnesium contents for silver alloys—Inductively coupled plasma atomic emission spectrometry GB/T 15072.20-1994 Method for chemical analysis of precious metals and their alloys—Gold alloys—Determination of zirconium content GB/T 15072.20-2025 Methods for chemical analysis of precious metal alloys—Part 20:Determination of rhodium content YS/T 370-2006 Precious metals and alloys—Preparation method for metallographic samples YS/T 370-2018 Preparation method for metallographic specimens of precious metals and their alloys