Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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GB/T 32790-2016 Methods for evaluating the weld quality of seam welds in aluminium and aluminium alloy extrusion 80.0 via email in 1~3 business day valid
GB/T 2522-2017 Methods of test for the determination of coating insulation resistance and coating adhesion of electrical strip and sheet 100.0 via email in 1 business day valid
GB/T 37787-2019 Metallic materials—Determination of microporosity—Fluorescence method 150.0 via email in 1~3 business day valid
GB/T 5678-2013 Sampling methods of spectrochemical analysis for cast alloys 170.0 via email in 1~3 business day valid
GB/T 31352-2014 Test methods for warp of sapphire substrates 150.0 via email in 1~3 business day valid
GB/T 224-2019 Determination of the depth of decarburization of steels 160.0 via email in 1~3 business day to be valid
GB/T 3658-2008 Methods of measurement of a.c. magnetic properties of magnetically soft materials 330.0 via email in 1~3 business day valid
GB/T 38223-2019 Determination of ferrite content in austenitic stainless steel castings 225.0 via email in 1~3 business day to be valid
GB/T 1425-1996 of melting temperature range for precious metals and their alloys - Testing method of thermal analysis 105.0 via email in 1~3 business day valid
YS/T 37.2-2007 High pure germanium dioxide - Determination of silicon content-Molybdenum blue spectrophotometric method 90.0 via email in 1~3 business day superseded
GB/T 32186-2015 Test methods of cleanliness of aluminium and aluminium alloy ingots 150.0 via email in 1~3 business day valid
GB/T 19289-2019 Methods of measurement of resistivity,density and stacking factor of electrical steel strip and sheet 315.0 via email in 1~5 business day to be valid
GB/T 2522-2007 Methods of test for the determination of surface insulation resistance and lamination factor of electric sheet and strip 80.0 via email in 1 business day superseded
GB/T 23606-2009 Copper-hydrogen embrittlement test method 100.0 via email in 1~3 business day valid
GB/T 226-2015 Test method for macrostructure and defect of steel by etching 80.0 via email in 1 business day valid
GB/T 4339-2008 Test methods for thermal expansion characteristic parameters of metallic materials 300.0 via email in 1~3 business day valid
GB/T 15711-2018 Inspection of non-metallic inclusions of steel—Etching test method of tower samples 80.0 via email in 1 business day valid
GB/T 13305-2008 Micrographic method for determining area content of the α-phases in stainless steels 160.0 via email in 1~3 business day valid
YS/T 37.4-2007 High pure germanium dioxide - Determination of magnesium aluminium cobalt nickel copper zinc indium lead calcium iron and arsenic content-Inductively coupled plasma mass spectrometric 90.0 via email in 1~3 business day superseded
GB/T 10129-2019 Methods of measurement of magnetic properties of electrical steel strip and sheet at medium frequencies 315.0 via email in 1~5 business day to be valid
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