Gr4 medical titanium bar production standards and requirements titanium alloy strength high titanium alloy density is generally about 4.51g/ cm3, only 60% of the steel, the strength of pure titanium is close to the strength of ordinary steel, some high strength titanium alloy more than the strength of many alloy structural steel. Therefore, the specific strength (strength/density) of titanium alloy is much higher than that of other metal structure materials, which can produce parts with high unit strength, good rigidity and light weight. At present, the engine components, skeleton, skin, fasteners and landing gear are all made of titanium alloy.
Titanium alloy has high thermal strength
Gr4 medical titanium bar production standards and requirements using temperature is several hundred degrees higher than aluminum alloy, in the medium temperature can still maintain the required strength, can work in 450 ~ 500℃ temperature for a long period of time these two kinds of titanium alloy in the range of 150℃ ~ 500℃ still have a high specific strength, and aluminum alloy at 150℃ than the strength decreased significantly. The working temperature of titanium alloy can reach 500℃, while that of aluminum alloy is below 200℃.
Titanium alloy has good corrosion resistance
Gr4 medical titanium bar production standards and requirements titanium alloy in the humid atmosphere and sea water medium work, its corrosion resistance is much better than stainless steel; It is especially resistant to pitting, acid and stress corrosion. Good corrosion resistance to alkali, chloride, chlorine, nitric acid, sulfuric acid, etc. However, titanium has poor corrosion resistance to medium with reducing oxygen and chromium salt.
Titanium alloy has good low temperature performance
Gr4 medical titanium bar production standards and requirements of titanium alloy in low and ultra-low temperature, still can maintain its mechanical properties. Titanium alloys with good low temperature performance and very low clearance elements, such as TA7, can maintain a certain plasticity at -253℃. Therefore, titanium alloy is also an important low temperature structural material.
Gr4 thermal expansion coefficient: Gr4 titanium alloy has a series of advantages such as excellent corrosion resistance, small density, high specific strength, good toughness and weldability, and has been successfully applied in the fields of aerospace, petrochemical, shipbuilding, automobile and medicine.
Gr4 titanium alloy mechanical properties, tensile strength of sigma b/MPa or greater, 895 of specified residual elongation stress in the sigma r0.2 / MPa or greater 825, 5 (%) of 10 or higher elongation delta, reduction of area bits (%) of 25 or higher
Gr4 titanium alloy density: 4.5 (g/cm3) operating temperature: 100 ~ 550 (℃)
Gr4 titanium alloy chemical composition: Gr4 containing titanium (Ti) allowance, iron (Fe) 0.30, or less carbon (C) 0.10, or less nitrogen (N) 0.05 or less, hydrogen (H), 0.015 or less oxygen (O) of 0.20 or less, aluminum (Al) 5.5 ~ 6.8, vanadium (V) 3.5 ~ 4.5
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