GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis
GB/T 223.1-1981 Determination of carbon content in iron,steel and alloy
GB/T 223.2-1981 Determination of sulfur content in steel and alloy
GB/T 223.3-1988 Methods for chemical analysis of iron, steel and alloy--The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content
GB/T 223.4-1988 Methods for chemical analysis of iron, steel and alloy--The volumetric method for determination of manganese content by ammonium nitrate oxidation
EJ/T 1123-2000 history
2000EJ/T 1123-2000 Specification for the magetic material of the CRDM for pressurized water reactor nuclear power plants