This standard specifies a method for the determination of vanadium content in vanadium-nitrogen alloys using the ferrous sulfate ammonium Titrimetric method, which is suitable for the determination of vanadium content in vanadium-nitrogen alloys. The measurement range is greater than or equal to 60.00% of vanadium mass fraction. The standard describes in detail the determination principle, required reagents and materials, operation steps, and measurement accuracy requirements. The method calculates the vanadium content in the sample by dissolving the sample and titrating it with ferrous sulfate ammonium titration solution in a specific medium. It is widely used in metallurgical and materials industries for quality control of vanadium-nitrogen alloys.