IS 228 : Part 6 : 1987 Methods for Chemical Analysis of Steels - Part 6 : Determination of Chromium by Persulphate Oxidation Method (for Chromium>0.1 Percent)

1 Scope

1.1 This standard (Part 6) covers the persulphate oxidationmethod for determination of chromium content of low alloy and highalloy steels containing more than or equal to 0.1 percent chromium.This method is not applicable for steels containing tungsten.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 228 : Part 6 :1974 Methods for chemical analysis of steels:Part 6 Determination of chromium by persulphateoxidation method (for chromium ≥0.5 percent)

IS 264 :1976Specification for nitric acid

IS 1070 :1977Specification for water for general laboratoryuse