1 Scope
This Part of GB/T 223 specifies the determination of chromium content with visual titration or potentiometric titration method.
Method I of this Part is applicable to the determination of chromium content with mass fraction 0.10%~35.00% in pig iron, carbon steel, alloy steel, high-temperature alloy and precision alloy; method II of this Part is applicable to the determination of chromium content with mass fraction 0.25%~35.00% in iron and steel.
2 Normative References
The following standards contain provisions which, through reference in this Part of GB/T 223, constitute provisions of this Part. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
Contents
Foreword i
1 Scope
2 Normative References
3 Method I Visual Titration Method
4 Method II Potentiometric Titration Method
5 Test Report
Annex A (Informative) Method I Source Data of Common Precision Test
Annex B (Informative) Method II Additional Information of International Cooperation Test
Annex C (Informative) Method II Diagram of Precision Data
