Common purity of vanadium sheets is 99.5%, 99.7% and 99.9%. Pure vanadium is a typical plastic deformation metal with good ductility. Vanadium can be cold processed into sheets. The mechanical properties depend on its purity. Non-metallic impurities impact much more than metallic ones in the same condition. Plasticity of vanadium would dramatically reduce due to the existence of Hydrogen, Oxygen, Nitrogen and Carbon. For example, vanadium will become fragile even if the content of Hydrogen is 0.001% and Oxygen 0.05%. Vanadium will be destroyed during cold deformation when the content of Oxygen is over 0.15%, If Oxygen is over 0.5%, it is impossible to be cold deformed. Since the content of Nitrogen is approximately 10% of Oxygen, it should not be higher than 0.015% to keep excellent plasticity. Carbon is the least harmful impurities compared with others. When carbon alloyed vanadium is processed at room temperature, vanadium becomes fragile if Carbon is 0.3% to 0.5%.
