This standard applies to the determination of carbon content in ferrochromium. Measuring range: 4.00% to 10.50%.
GB/T 5687.7-1988 history
2008GB/T 4699.4-2008 Ferrochromium and silicochromium. Determination of carbon content. Infrared absorption method and gravimetric method
1988GB/T 5687.7-1988 Methods for chemical analysis of ferro-chromium--The gravimetric method for the determination of carbon content
GB/T 5687.7-1988 Methods for chemical analysis of ferro-chromium--The gravimetric method for the determination of carbon content was changed to GB/T 4699.4-2008 Ferrochromium and silicochromium. Determination of carbon content. Infrared absorption method and gravimetric method.