GB/T 42160-2022 Grain boundary diffusion neodymium iron boron permanent magnet materials

GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 22315-2008 Metallic materials—Determination of modulus of elasticity and Poisson's ratio GB/T 3217-1992 Methods of test of the magnetic properties of permanent magnetic (magnetically hard) materials GB/T 3217-2013 Permanent magnet(magnetically hard)materials—Methods of measurement of magnetic properties GB/T 3850-1983 Impermeable sintered metal materials and hardmetals—determination of density GB/T 3850-2015 Impermeable sintered metal materials and hardmetals—Determination of density GB/T 4339-1999 Testing method for thermal expansion characteristic parameters of metallic materials GB/T 4339-2008 Test methods for thermal expansion characteristic parameters of metallic materials GB/T 5167-1985 Sintered metal materials and hardmetals—Determination of electrical resistivity GB/T 5167-2018 Sintered metal materials and hardmetals—Determination of electrical resistivity GB/T 7314-2005 Metallic materials—Compression testing at ambient temperature GB/T 7314-2017 Metallic materials—Compression test method at room temperature GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 9097-2016 Sintered metal materials,excluding hardmetals—Determination of apparent hardness and mincrohardness GB/T 9097.1-2002 Sintered metal materials,excluding hardmetals—Determination of apparent hardness Part 1:Materials of essentially uniform section hardness GB/T 9637-2001 Electrotechnical terminology— Magnetic materials and components GB/T 13560-2000 Materials for sintered neodymium iron boron permanent magnets GB/T 13560-2009 Materials for sintered neodymium iron boron permanent magnets GB/T 13560-2017 Sintered neodymium iron boron permanent magnets GB/T 22588-2008 Determination of thermal diffusivity or thermal conductivity by the flash method GB/T 24270-2009 Method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials GB/T 29628-2013 Guides for methods of measurement of the magnetic properties of permanent(magnetically hard) materials by pulsed field magnetometry GB/T 31967.2-2015 Test method for physical property of rare earth permanent magnetic materials—Part 2:Determination of bending strength and fracture toughness GB/T 34491-2017 Coatings for sintered neodymium iron boron permanent magnets GB/T 38437-2019 Methods of measurement of the magnetic dipole moment of a ferromagnetic material specimen by the withdrawal or rotation method GB 39176-2020 Rare earth products packing,marking,transport and storage GB/T 40792-2021 Test method of weight loss of sintered neodymium iron boron permanent magnets GB/T 40793-2021 Nonmetallic coatings for sintered neodymium iron boron permanent magnets GB/T 40794-2021 Measurement method of irreversible magnetic flux loss due to high temperature of rare earth permanent magnet NB/SH/T 0632-2014 The determination of specific heat capacity by differential scanning calorimetry