GB/T 223.74-1997 Methods for chemical analysis of iron, steel and alloy. The combustion gravimetric/gas-volumetric method for the determination of combined carbon content (English Version)
This standard specifies the determination of non-combined carbon content by gravimetric method after combustion in tube furnace or gas volumetric method after combustion in tube furnace. This standard applies to the determination of 0.030% (m/m) to 5.00% (m/m) uncombined carbon content in iron and carbon steel.
GB/T 223.74-1997 history
1997GB/T 223.71-1997 Methods for chemical analysis of iron, steel and alloy. The gravimetric method after combustion in the pipe furnace for the determination of carbon content
1991GB/T 223.71-1991 Methods for chemical analysis of iron,steel and alloy--The combustion gravimetric method for the determination of carbon content