GB/T 9943-1988 High speed tool steel bars—Technical requirements

GB/T 9943-2008 High-speed tool steels

GB/T 223.30-1994 Methods for chemical analysis of iron, steel and alloy The arsenazo Ⅲ spectrophotometric method for the determination of zirconium content after separation by p-bromomandelic acid GB/T 223.31-1994 Methods for chemical analysis of iron, steel and alloy The distillation-molybdenum blue spectrophotometric method for the determination of arsenic content GB/T 223.31-2008 Iron,steel and alloy—Determination of arsenic content—Distillation-molybdenum blue spectrophotometric method GB/T 223.31-2026 Iron, steel and alloy—Determination of arsenic content—Spectrophotometric method and iodimetric method GB/T 223.32-1994 Methods for chemical analysis of iron, steel and alloy The hypophosphite reduction-iodimetric method for the determination of arsenic content GB/T 223.33-1994 Methods for chemical analysis of iron, steel and alloy The chlorophosphonago mA photometric method for the determination of cerium content after extraction separation GB/T 223.34-2000 Methods for chemical analysis of iron,steel and alloy—The determination of hydrochloric acid-insoluble content of iron powders GB/T 223.36-1994 Methods for chemical analysis of iron, steel and alloy The neutral titration method for the determination of nitrogen content after distillation separation GB/T 223.37-1989 Methods for chemical analysis of iron, steel and alloy The indophenol blue photometric method for the determination of nitrogen content after distillation separation GB/T 223.37-2020 Iron,steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation GB/T 223.38-1985 Methods for chemical analysis of iron, steel and alloy—The anion-exchange separation-gravimetric method for the determination of niobium content GB/T 223.39-1994 Methods for chemical analysis iron,steel and alloy The sulphochlorophenol S photometric method for the determination of niobium content GB/T 223.40-1985 Methods for chemical analysis of iron, steel and alloy—The anion-exchange separation-sulphochlorophenol S photometric method for the determination of niobium content GB/T 223.40-2007 Iron,steel and alloy—Determination of niobium content by the sulphochlorophenol S spectrophotometric method GB/T 223.41-1985 Methods for chemical analysis of iron, steel and alloy—The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content GB/T 223.42-1985 Methods for chemical analysis of iron, steel and alloy—The anion-exchange separation-brom opyrogallol red photometric method for the determination of tantalum content GB/T 223.43-1994 Methods for chemical analysis of iron, steel and alloy—Determination of tungsten content GB/T 223.43-2008 Iron,steel and alloy—Determination of tungsten content—Gravimetric method and spectrophotometric method GB/T 223.45-1994 Methods for chemical analysis of iron, steel and alloy—The cupral separation-xylidyl blue Ⅱphotometric method for the determination of magnesium content GB/T 223.46-1989 Methods for chemical analysis of iron, steel and alloy—The flame atomic absorption spectrometric method for the determination of magnesium content GB/T 223.47-1994 Methods for chemical analysis of iron, steel and alloy—The carrier precipitation-molybdenum blue potometric method for the determination of antimony content GB/T 223.48-1985 Methods for chemical analysis of iron, steel and alloy—The semixylenol orange photometric method for the determination of bismuth content GB/T 223.49-1994 Methods for chemical analysis of iron, steel and alloy—Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content GB/T 223.50-1994 Methods for chemical analysis of iron, steel and alloy—The phenylfluorone-CTMAB direct photometric method for the determination of tin content GB/T 223.51-1987 Methods for chemical analysis of iron，steel and alloy--The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content GB/T 223.52-1987 Methods for chemical analysis of iron，steel and alloy--The hydroxylamine hydrochloride-iodometric method for the determination of selenium content GB/T 223.53-1987 Methods for chemical analysis of iron，steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content GB/T 223.54-1987 Methods for chemical analysis of iron,steel and alloy—The flame atomic absorption spectrophotometric method for the determination of nickel content GB/T 223.54-2022 Iron,steel and alloy—Determination of nickel content—Flame atomic absorption spectrometric method GB/T 223.55-2008 Iron,steel and alloy—Determination of tellurium content—Oscillo-polarographic method GB 223.57-1989 The method of chemical analysis for steel and alloys: Extraction separation-adsorption catalytic polarography for the determination of cadmium GB/T 223.58-1987 Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese content GB/T 223.59-2008 Iron,steel and alloy—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method GB/T 223.60-1997 Methods for chemical analysis of iron,steel and alloy—The perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.60-2024 Iron,steel and alloy—Determination of silicon content—Gravimetric method GB/T 223.61-1988 Methods for chemical analysis of iron,steel and alloy—The ammonium phosphomolybdate volumetric method for the determination of phosphorus content GB/T 223.62-1988 Methods for chemical analysis of iron,steel and alloy—The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63-1988 Methods for chemical analysis of iron,steel and alloy—The sodium(potassium)periodate photometric method for the determination of manganese content GB/T 223.63-2022 Iron,steel and alloy—Determination of manganese content—Sodium(potassium) periodate spectrophotometric method GB/T 223.64-1988 Methods for chemical analysis of iron,steel and alloy—The flame atomic absorption spectrometric method forthe determination of manganese content GB/T 223.64-2008 Iron,steel and alloy—Determination of manganese content—Flame atomic absorption spectrometric method GB/T 223.65-1988 Methods for chemical analysis of iron,steel and alloy—The flame atomic absorption spectrometric method for the determination of cobalt content GB/T 223.65-2012 Steel,iron and alloy—Determination of cobalt content—Flame atomic absorption spectrometric method GB/T 223.66-1989 Methods for chemical analysis of iron, steel and alloy—The thiocyanate chlorpromazine hydrochloride—chloro form extraction photometric method for the determination of tungsten content GB/T 223.67-1989 Methods for chemical analysis of iron, steel and alloy—The reducing distillation-methylene blue photometric method for the determination of sulfur content GB/T 223.67-2008 Iron,steel and alloy—Determination of sulfur content—Methylene blue spectrophotometric method GB/T 223.68-1997 Methods for chemical analysis of iron,steel and alloy The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content GB/T 223.69-1997 Methods for chemical analysis of iron,steel and alloy The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content GB/T 223.69-2008 Iron,steel and alloy—Determination of carbon contents—Gas-volumetric method after combustion in the pipe furnace GB/T 223.70-1989 Methods for chemical analysis of iron, steel and alloy—The o-phenanthroline spectrophotometric method for the determination of iron content GB/T 223.70-2008 Iron,steel and alloy—Determination of iron contents—o-Phenanthroline spectrophotometric method GB/T 223.71-1997 Methods for chemical analysis of iron,steel and alloy—The gravimetric method after combustion in the pipe furnace for the determination of carbon content GB/T 223.72-1991 Methods for chemical analysis of iron, steel and alloy—The alumina chromatographic separation-barium sulfate gravimetric method for the determination of sulphur content GB/T 223.72-2008 Iron,steel and alloy—Determination of sulfur content—Gravimetric method GB/T 223.73-1991 Methods for chemical analysis of iron, steel and alloy—The titanium trichloride-potassium dichromate volumetric method for the determination of iron content GB/T 223.73-2008 Iron,steel and alloy—Determination of iron contents—Titanium trichloride-potassium dichromate titration method GB/T 223.74-1997 Methods for chemical analysis of iron,steel and alloy—The combustion gravimetric/gas-volumetric method for the determination of combined carbon content GB/T 223.75-1991 Methods for chemical analysis of iron, steel and alloy—The methanol distillation-curcumin photometric method for the determination of boron content GB/T 223.75-2008 Iron,steel and alloy—Determination of boron content—Methanol distillation-curcumin photometric method GB/T 223.76-1994 Methods for chemical analysis iron, steel and alloy—The flame atomic absorption spectrometric method for the determination of vanadium content GB/T 223.77-1994 Methods for chemical analysis of iron, steel and alloy—The flame atomic absorption spectrometric method for the determination of calcium content GB/T 223.78-2000 Methods for chemical analysis of iron,steel and alloy—Curcumin spectrophotometric method for the determination of boron content GB/T 223.79-2007 Iron and steel—Determination of multi-element contents—X-ray fluorescence spectrometry(Routine method) GB/T 223.80-2007 Iron,steel and alloy—Determination of trace bismuth and arsenic contents—Hydride generation-atomic fluorescence spectrometric method GB/T 223.81-2007 Iron,steel and alloy—Determination of total aluminum and total boron contents—Microwave digestion-inductively coupled plasma mass spectrometric method GB/T 223.82-2007 Steel and iron—Determination of hydrogen content—Inert gas impulse fusion heat conductivity method GB/T 223.82-2018 Steel and iron—Determination of hydrogen content—Thermal conductivity/infrared method after fusion under inert gas GB/T 223.83-2009 Steel and iron—Determination of high sulfur content—Infrared absorption method after combustion in an induction furnace GB/T 223.84-2009 Steel and iron—Determination of titanium content—Diantipyrylmethane spectrophotometric method GB/T 223.85-2009 Steel and iron—Determination of sulfur content—Infrared absorption method after combustion in an induction furnace GB/T 223.86-2009 Steel and iron—Determination of total carbon content—Infrared absorption method after combustion in an induction furnace GB/T 223.87-2018 Iron, steel and alloy—Determination of calcium and magnesium—Inductively coupled plasma mass spectrometric method GB/T 223.88-2019 Iron,steel and alloy—Determination of calcium and magnesium contents—Inductively coupled plasma atomic emission spectrometric method GB/T 223.89-2019 Iron,steel and alloy—Determination of tellurium content—Hydride generation-atomic fluorescence spectrometric method GB/T 223.90-2021 Iron,steel and alloy—Determination of silicon content—Inductively coupled plasma atomic emission spectrometric method GB/T 223.91-2021 Iron,steel and alloy—Determination of copper—2,2′-Biquinoline spectrophotometric method GB/T 223.92-2023 Iron, steel and alloy—Determination of lanthanum, cerium, praseodymium, neodymium and samarium content—Inductively coupled plasma mass spectrometry GB/T 224-1987 Determination of depth of decarburization of steel GB/T 224-2008 Determination of depth of decarburization of steels GB/T 224-2019 Determination of the depth of decarburization of steels GB/T 231.1-2002 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2009 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2018 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.2-2002 Metallic Brinell hardness test—Part 2:Verification and calibration of hardness testers GB/T 231.2-2012 Metallic materials—Brinell hardness test—Part 2:Verification and calibration of testing machines GB/T 231.2-2022 Metallic materials—Brinell hardness test—Part 2:Verification and calibration of testing machines GB/T 231.3-2002 Metallic Brinell hardness test—Part 3:Calibration of hardness reference blocks GB/T 231.3-2012 Metallic materials—Brinell hardness test—Part 3:Calibration of reference blocks GB/T 231.3-2022 Metallic materials—Brinell hardness test—Part 3:Calibration of reference blocks GB/T 231.4-2009 Metallic materials—Brinell hardness test—Part 4:Tables of hardness values GB/T 230.1-2004 Metallic Rockwell hardness test—Part1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2009 Metallic materials—Rockwell hardness test—Part 1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method GB/T 230.2-2002 Metallic rockwell hardness test—Part 2:Verification and calibration of hardness testers(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.2-2012 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines GB/T 230.2-2022 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines and indenters GB/T 230.3-2002 Metallic rockwell hardness test—Part 3:Calibration of hardness reference blocks(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.3-2012 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.3-2022 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks GB/T 1814-1979 Inspection method for steel work fractures GB/T 2101-1989 General requirements of acceptance, packaging, marking and certification for section steel GB/T 2101-2008 General requirement of acceptance,packaging,marking,and certification for section steel GB/T 2101-2017 General requirement of acceptance,packaging,marking and certification for section steel YB 28

ASTM A600:1979