This standard specifies terms and definitions, instruments and equipments, determination of immersion expansion ratio, determination of autoclave chalked ratio, and test report used in test method for stability of steel slag. Method for determination of immersion expansion ratio in this standard is applicable to steel slag for road subgrade and road base material, steel slag for asphalt pavement aggregate, and steel slag for engineering landfill.Method for determination of autoclave chalked ratio in this standard is applicable to steel slag in building mortars, building products and concrete.