This Subsection of BS 6200 describes a spectrophotometric method for the determination of tungsten in steel. It is suitable for contents of 0.02 % (m/m) to 3.0 % (m/m) but is not recommended for steels with tungsten exceeding 3 % (m/m) or more than 1.5 % (m/m) molybdenum. For these the method given in BS 6200-3.33.1 is more suitable. A correction is required if vanadium is present.
NOTE The titles of the publications referred to in this Subsection of BS 6200 are listed on the inside back cover.