1 Scope
This International Standard specifies a gravimetric method for the determination of the mass fraction of insoluble (free) carbon in carbides and hardmetals.
This method is applicable to
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— carbides of hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium,
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— mixtures of these carbides and binder metals, free of lubricant, and
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— all grades of presintered or sintered hardmetals, produced from these carbides,
having a mass fraction of insoluble carbon between 0,02 % and 0,5 %.