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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 110.0 via email in 1 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 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 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 valid
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 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of surface insulation resistance and lamination factor of electric sheet and strip 80.0 via email in 1 business day superseded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 110.0 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 13305-2008 Micrographic method for determining area content of the α-phases in stainless steels 270.0 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 valid
GB/T 13298-2015 Inspection methods of microstructure for metals 130.0 via email in 1 business day valid
GB/T 22587-2017 Matrix to superconductor volume ratio measurement-Copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires 315.0 via email in 1~5 business day valid
GB/T 34474.1-2017 Determination of banded structure of steel-Part 1:Micrographic method using standards diagrams 405.0 via email in 1~5 business day valid
GB/T 24177-2009 Standard test methods for characterizing duplex grain sizes 315.0 via email in 1~3 business day valid
SY/T 0599-1997 Sulfide stress cracking resistant metallic material requirements for gas surface equipment 165.0 via email in 1~3 business day superseded
GB/T 3246.1-2012 Inspection method for structure of wrought aluminum and aluminum alloy products Part 1 : Inspection method for microstructure 315.0 via email in 1~3 business day valid
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