GB/T 223.9-2000 Methods for chemical analysis of iron,steel and alloy The chrom azurol S photometric method for the determination of aluminium content (English Version)
This standard specifies the determination of acid-soluble aluminum content by chrome azure S photometric method. This standard applies to the determination of 0.050% (m/m) to 1.00% (m/m) aluminum content in steel and alloys.
GB/T 223.9-2000 history
2008GB/T 223.9-2008 Iron,steel and alloy.Determination of aluminium content.Chrome azurol S photometric method
2000GB/T 223.9-2000 Methods for chemical analysis of iron,steel and alloy The chrom azurol S photometric method for the determination of aluminium content