Among titanium metal materials, including titanium rods, titanium flanges, titanium plates, etc., are divided into
pure titanium and titanium alloys. Compared with pure titanium, titanium alloys are added with Al, Mo, Cr, Sn, Mn, V and other alloying elements. Therefore, pure titanium has its unique excellent properties and different uses in terms of mechanical properties.
1. Performance
Ti: 4.507 g/cm3, Tm: 1688°C. It has allotrope transformation, α phase with hexagonal close-packed structure at ≤882.5℃, and β phase with body-centered cubic structure at ≥882.5℃.
Pure titanium has low strength, but high specific strength, good plasticity, good low temperature toughness and high corrosion resistance. Titanium has good pressure processing performance and poor cutting performance. Titanium can burn when heated in nitrogen, so titanium should be protected by argon during heating and welding.
2. Classification
According to the impurity content, titanium is divided into high-purity titanium (purity of 99.9%) and industrial pure titanium (purity of 99.5%). There are three grades of industrial pure titanium, which are respectively represented by TA + serial number numbers 1, 2, and 3. The larger the number, the lower the purity.
3. Purpose
The content of impurities has a great influence on the performance of titanium. A small amount of impurities can significantly improve the strength of titanium. Therefore, the strength of industrial pure titanium is relatively high, close to the level of high-strength aluminum alloys. It is mainly used to manufacture heat exchangers for petrochemical industries that work below 350 °C , reactors, ship parts, aircraft skins, etc.
