GB/T 20168-2006 Rapidly-quenched neodymium iron boron permanent magnetic powder

GB/T 20168-2017 Rapidly-quenched neodymium iron boron permanent magnetic powder

GB/T 1479-1984 Metallic powders—Determination of apparent density—Part 1:Funnel method GB/T 1479.1-2011 Metallic powders—Determination of apparent density—Part 1:Funnal method GB/T 1479.2-2011 Metallic powders—Determination of apparent density—Part 2:Scott volumeter method GB/T 1479.3-2017 Metallic powders—Determination of apparent density—Part 3:Oscillating funnel method GB/T 1480-1995 Determination of particle size for metallic powders—Dry sieving GB/T 1480-2012 Metallic powders—Determination of particle size by dry sieving 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 5158.4-2001 Metallic powders—Determination of total oxygen content by reduction-extraction GB/T 5158.4-2011 Metallic powders—Determination of oxygen content by reduction methods—Part 4:Total oxygen by reduction-extraction 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 9637-2001 Electrotechnical terminology— Magnetic materials and components GB/T 17803-1999 Designation system for rare earth products GB/T 17803-2015 Designation system for rare earth products GB/T 1480-2025 Metallic powders—Determination of particle size by dry sieving