The following standards contain provisions in this standard by reference in the provisions of this standard.
Reference standard of tungsten contacts in cut-out:
Chemical analysis of tungsten ------ GB / T 4324.1-4324.30 --- 1984
Metallic Vickers hardness test method------ GB / T 4340 --- 1984
Metallic Rockwell hardness test method------ GB / T 230 --- 1991
Cut-out in Magneto test method------ JB / T 9864.2 --- 1999
Tungsten rod in cut-out contacts technical conditions ------ JB / T 9860.2 --- 1999
Sintered bar, rod crystal grain size of tungsten, molybdenum and alloys test method ------ GB / T 4197 --- 1984
Batch inspection Sampling procedures and sample forms (for continuous batch of checks) ------ GB / T 2828 --- 1987
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