Specifies a photometric method for the determination of the titanium content (annex A), a gravimetric method for the determination of tantalum contents greater than 1 % (m/m) (annex B) and a photometric method for the determination of tantalum contents less than 1 % (m/m) (annex C). The methods are applicable to ferroniobium having niobium contents between 40 and 75 % (m/m), tantalum contents between 0,25 and 8,0 % (m/m) and titanium contents between 0,05 and 5,0 % (m/m). Interference may arise if bismuth or trivalent antimony are present.
Status: WithdrawnPublication date: 1982-12
Edition: 1Number of pages: 14
Technical Committee: ISO/TC 132 Ferroalloys
- ICS :
- 77.100 Ferroalloys
ISO/TR 7955:1982Stage: 95.99
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