N5 is a pure nickel material also known as UNS N02201. It is an ultra-low carbon pure nickel alloy with a content of up to 99.6%. It contains almost no magnesium, silicon, aluminum and other alloying elements. It has excellent corrosion resistance, strength, toughness and wear resistance at room temperature. It is a kind of High-quality metal materials widely used in chemical technology, aerospace, medicine, food processing and other fields.