GB/T 13840-1992
Abolished
GB/T 40794-2021
Active
National standards
GB/T 40794-2021 Measurement method of irreversible magnetic flux loss due to high temperature of rare earth permanent magnet
GB/T 40794-2021 Measurement method of irreversible magnetic flux loss due to high temperature of rare earth permanent magnet
Basic Information
Standard Code:
GB/T 40794-2021
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Analysis methods for rare metals and their alloys
ICS Name:
Other non-ferrous metals and their alloys
Publish Date:
2021-10-11
Implement Date:
2022-05-01
Pages:
9 pages
Scope
This document specifies the testing method for the irreversible loss of magnetic flux at high temperatures in rare earth permanent magnet materials.
This document is applicable to the testing of the irreversible loss of magnetic flux at high temperatures in neodymium-iron-boron type permanent magnets.
Development Information
Referenced Standards
GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results—Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method
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 38437-2019 Methods of measurement of the magnetic dipole moment of a ferromagnetic material specimen by the withdrawal or rotation method
Related Standards
GB/T 15677-1995
Replaced
GB/T 15677-1995 Lanthanum metal
GB/T 3136-1995
abolished_transferred
GB/T 3136-1995 Tantalum powders
GB/T 3463-1995
Abolished
GB/T 3463-1995 Tantalum wires
GB/T 3628-1995
Replaced
GB/T 3628-1995 Tantalum and tantalum alloy foils
GB/T 16476-1996
Replaced