Titanium M3 M4 M6 M8 Hex Titanium Bolts

The density of titanium is 4.51g/cm3, which is 57% of steel. Titanium is less than twice as heavy as aluminum and three times stronger than aluminum. The specific strength (strength/density ratio) of titanium alloy is the largest among commonly used industrial alloys (see Table 2-1). The specific strength of titanium alloy is 3.5 times that of stainless steel; 1.3 times that of aluminum alloy; 1.7 times that of magnesium alloy. Therefore, it is an indispensable structural material for the aerospace industry.

The passivity of titanium depends on the existence of oxide film, and its corrosion resistance in oxidizing medium is much better than in reducing medium. High rates of corrosion occur in reducing media. Titanium is not corroded in some corrosive media, such as seawater, wet chlorine, chlorite and hypochlorite solutions, nitric acid, chromic acid, metal chlorides, sulfides and organic acids. However, in the medium (such as hydrochloric acid and sulfuric acid) that reacts with titanium to generate hydrogen, titanium usually has a large corrosion rate. However, if a small amount of oxidant is added to the acid, a passivation film will be formed on the titanium surface. Therefore, titanium is corrosion-resistant in a mixture of strong sulfuric acid-nitric acid or hydrochloric acid-nitric acid, even in hydrochloric acid containing free chlorine. Titanium's protective oxide film is often formed when the metal comes into contact with water, even in small amounts of water or steam. If titanium is exposed to a strong oxidizing environment without water, it will oxidize rapidly and produce violent reactions, and even spontaneous combustion often occurs. Such phenomena have occurred with the reaction of titanium with fuming nitric acid containing excess nitrogen oxides and with dry chlorine gas. So to prevent this kind of reaction, there must be a certain amount of water.

Usually aluminum loses its original properties at 150°C, stainless steel at 310°C, and titanium alloys still maintain good mechanical properties at about 500°C. When the speed of the aircraft reaches 2.7 times the speed of sound, the surface temperature of the aircraft structure reaches 230°C, aluminum alloys and magnesium alloys can no longer be used, while titanium alloys can meet the requirements. Titanium has good heat resistance, and it is used in the discs and blades of aeroengine compressors and the skin of the rear fuselage of aircraft.

Use titanium and other metal materials (copper, steel) to make bells with exactly the same shape and size. If you strike each bell with the same force, you will find that the sound of the bell made of titanium oscillates for a long time, that is, through The energy given to the clock by knocking is not easily lost, so we say that titanium has low damping performance.

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