Titanium is a new type of metal, and the performance of the carbon-containing

Titanium is a new type of metal, and the performance of the carbon-containing titanium impurity content of nitrogen, hydrogen, oxygen and so on, the most pure titanium iodide impurity content not exceeding 0.1%, but its low strength, high ductility. 99.5% of the performance of industrial pure titanium plate as: density ρ = 4.5g / cc, a melting point of 1725 ℃, thermal conductivity λ = 15.24W / (mK), the tensile strength σb = 539MPa, elongation δ = 25%, section shrinkage ψ = 25%, the elastic modulus E = 1.078 × 105MPa, the hardness HB195.
High strength
Density of titanium alloys is generally about 4.51g / cc,
Only 60% of steel, titanium density was close to the density of ordinary steel, some high-strength titanium alloy over the strength of the many structural steel. Therefore, the ratio of titanium strength (strength / density) is much larger than other metal structural materials, see Table 7-1, the unit can be made out of high strength, rigidity and lightweight components. Aircraft engine components, skeleton, skin, so the use of titanium fasteners and landing gear.
High heat intensity
Use temperature several hundred degrees higher than aluminum, at moderate temperatures can still maintain the desired strength, long-term work at a temperature of 450 ~ 500 ℃ of these two types of titanium tubing alloys in the range of 150 ℃ ~ 500 ℃ still very high strength, and aluminum at 150 ℃ decreased significantly when compared strength. Titanium alloy operating temperature up to 500 ℃, the aluminum alloy is below 200 ℃.
Good corrosion resistance
Titanium work in humid atmosphere and seawater, which is far superior corrosion resistance of stainless steel; for pitting, etching, stress corrosion resistance is particularly strong; alkali, chloride, chlorine, organic materials, nitric acid, sulfuric acid etc. have excellent corrosion resistance. However, the corrosion resistance of titanium with a reduction of oxygen and chromium salts medium is poor.