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The specific strength of the alloy steel with the same strength is only 15.5-19. Titanium alloys are widely used in shipbuilding, chemical machinery and medical equipment because of their high strength and corrosion resistance. Among them, corrosion-resistant titanium alloy is mainly used in reactors, towers, autoclaves, heat exchangers, pumps, valves, centrifuges, pipelines, pipe fittings, electrolyzers and so on in various strong corrosive environments. However,titanium filler rod, the application of titanium and its alloys is limited due to their high price. Expand the full text (1) Titanium by iodine method, grade TAD It is high-purity titanium obtained by iodination method, so it is called iodination titanium, or chemically pure titanium. However, it still contains interstitial impurities such as oxygen, nitrogen and carbon, which have a great influence on the mechanical properties of pure titanium. As the purity of titanium increases, the strength and hardness of titanium decrease significantly; therefore, it is characterized by good chemical stability, but very low strength. Because of its low strength, high purity titanium is of little interest as a structural material and is rarely used in industry. At present, industrial pure titanium and titanium alloys are widely used in industry. (2) Commercially pure titanium Unlike chemically pure titanium, industrially pure titanium contains more oxygen, nitrogen,titanium round bar, carbon and many other impurity elements (such as iron, silicon, etc.). It is essentially a titanium alloy with low alloy content. Compared with chemically pure titanium, its strength is greatly improved because it contains more impurity elements, and its mechanical and chemical properties are similar to those of stainless steel (but its strength is still lower than that of titanium alloy). The characteristics of industrial pure titanium are: low strength, good plasticity, easy processing, stamping, welding, good machinability; good corrosion resistance in the atmosphere, sea water, wet chlorine and oxidizing, neutral, weak reducing medium, oxidation resistance is superior to most austenitic stainless steel; but poor heat resistance, the use temperature should not be too high. Commercially pure titanium is divided into three grades of TA 1, TA 2 and TA 3 according to its impurity content. The interstitial impurity elements of the three kinds of commercial pure titanium increase gradually, so the mechanical strength and hardness also increase gradually, but the plasticity and toughness decrease correspondingly. Commercially pure titanium TA2 is commonly used in industry because of its moderate corrosion resistance and comprehensive mechanical properties. TA3 can be selected when the requirements for wear resistance and strength are high. TA1 can be selected when good formability is required. Industrial pure titanium is mainly used for stamping parts and corrosion-resistant structural parts with working temperature below 350 ℃, low stress and good plasticity, such as aircraft framework, skin, engine accessories, seawater corrosion-resistant pipelines, valves, pumps, hydrofoils and seawater desalination system parts for ships; Chemical heat exchangers, pumps, titanium bar gr7 ,Titanium welding pipe, distillation towers, coolers, agitators, tees, impellers, fasteners, ion pumps, compressor valves and diesel engine pistons, connecting rods, leaf springs, etc. (3) Alpha titanium alloy, TA4, TA5, TA6, TA7.TC3 and TC4 can be used as parts for long-term operation below 400 ℃, structural modules, various containers, pumps, low-temperature components, ship pressure shells, tank tracks, etc. The strength is higher than that of TC1 and TC2. TC6 can be used below 400 ℃ and is mainly used as a structural material for aircraft engines. TC9 can be used to manufacture parts working below 560 ℃ for a long time, mainly used in compressor disks and blades of aircraft jet engines. TC10 can be used to manufacture parts working below 450 ℃ for a long time, such as aircraft structural parts, landing gear, honeycomb connection components,titanium sheet grade 5, missile engine shells, weapon structural parts, etc. Return to Sohu to see more Responsible Editor:. yunchtitanium.com