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GB 10323-1988 Methods for chemical analysis of ferrochromium and silicochromium-The potentiometric titration method for the determination of chromium content 30.0 via email in 1~3 business day abolished
GB/T 223.70-2008 Iron steel and alloy - Determination of iron contents - O-phenanthroline spectrophotometric method 60.0 via email in 1 business day valid
GB 3654.1-1983 Methods for chemical analysis of ferroniobium;The paper chromatographic gravimetric method for the determination of niobium and tantalum content 30.0 via email in 1~3 business day valid
GB/T 5059.5-1986 Methods for chemical analysis of ferromolybdenum;The gravimetric method for the determination of silicon content 30.0 via email in 1~3 business day superseded
GB/T 20127.10-2006 Steel and alloy - Determination of trace element contents Part 10: Determination of selenium content by hydride generation-atomic fluorescence spectrometric method 90.0 via email in 1~3 business day valid
GB/T 20127.6-2006 Steel and alloy - Determination of trace element contents Part 6: Determination of germanium content by gallic acid oscillopolarographic method 90.0 via email in 1~3 business day abolished
GB/T 223.82-2007 Steel and iron—Determination of hydrogen content—Inert gas impulse fusion heat conductivity method 40.0 via email in 1 business day valid
GB/T 5687.10-2006 Ferrochromium - Determination of manganese content - Flame atomic absorption sspectrometric method 60.0 via email in 1~3 business day valid
GB/T 223.25-1994 Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime gravimetric method for the determination of nickel content 40.0 via email in 1 business day valid
GB/T 21933.1-2008 Ferronickel - Determination of nickel content - The dimethylglyoxime gravimetric method 170.0 via email in 1~3 business day valid
GB 3654.10-1983 Methods for chemical analysis of ferroniobium;The EDTA volumetric method for the determination of aluminum content 60.0 via email in 1~3 business day valid
GB/T 24583.8-2009 Vanadium-Nitrogen alloy—Determination of silicon,manganese,phosphorus,aluminum content—Inductively coupled plasma atomic emission spectrometric method 180.0 via email in 1~3 business day valid
GB 223.28-1989 Methods for chemical analysis of iron steel and alloy; The D-denzoinoxime gravimetric method for the determination of molybdenum content 105.0 via email in 1~3 business day valid
YB/T 5332-2006 Methods for chemical analysis of vanadium pentoxide The barium svlphate gravimetric method for the determination of sulphur content 30.0 via email in 1~3 business day abolished
GB/T 223.68-1989 Methods for chemical analysis of iron steel and alloy--The combustion potassium iodate volumetric method for the determination of sulfur content via email in business day abolished
GB 3654.5-1983 Methods for chemical analysis of ferroniobium;The molybdenum blue photometric method for the determination of the phosphorus content 60.0 via email in 1~3 business day valid
GB/T 22368-2008 Low-alloy steel - Determination of multi-element contents - Glow discharge optical emission spectrometry(Routine method) 375.0 via email in 1~3 business day valid
GB/T 5687.4-1985 Methods for chemical analysis of ferro-chromium; The neutralization titration method for the determination of nitrogen content 60.0 via email in 1~3 business day abolished
GB 3654.9-1983 Methods for chemical analysis of ferroniobium;The thiocyanate photometric method for the determination of tungsten content 30.0 via email in 1~3 business day valid
GB/T 4702.1-2016 Chromium metal—Determination of chromium content—The ammonium ferrous sulfate titrimetric method 75.0 via email in 1~3 business day valid
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