Titanium alloy and stainless steel which is good?
Titanium alloy and stainless steel have their own merits. 1, if the use of performance, titanium alloy, and stainless steel is very good, but the overall titanium alloy is more practical. 2, if the price, of titanium alloy, is more expensive for better economic conditions of the family, stainless steel is more affordable, more affordable for everyday use. 3, in fact, the price of titanium alloy is more expensive, but the practicality is good, but stainless steel is more suitable for Daily use, and the price is not so expensive.
Titanium and titanium alloy density of only 4.51, smaller than steel, and only half the weight of steel, but its strength and common carbon steel are about the same. Titanium is classified as a thermodynamically unstable metal, very active, titanium metal can generate a natural oxide film (titanium dioxide) with air, this layer of stable, strong adhesion, and exceptionally good protection of the oxide film, determine the corrosion resistance of titanium, thus titanium has excellent corrosion resistance, followed by a light texture, high tensile strength, good mechanical properties is another excellent feature of titanium alloys.
Titanium corrosion resistance is good: below 550 ℃ the titanium alloy profile is easy to form a dense oxide film, so it is not easy to further oxidation, the night air, seawater, steam, and some acids, alkalis, and soft media have a high resistance to loss of corrosion matter.
Titanium thermal strength is good: titanium alloy melting point of 1660 ℃, higher than iron, has high thermal strength, can be in the following 550 ℃ things, while in the low temperature surfaced a better toughness.
Titanium processing is difficult: welding, electroplating, and cold drawing are very difficult. Welding and plating must be carried out under a vacuum or in a condition filled with inert gas (vacuum ion plating).
Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance, and high heat resistance.
The density of titanium alloy is generally around 4.51g/cm3, which is only 60% of that of steel. The density of pure titanium is only close to that of ordinary steel, and some high-strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength/density of titanium alloy is much greater than other metal structural materials, see Table 7-1, and can be made with unit strength, good rigidity, and lightweight parts. Aircraft engine components, skeletons, skins, fasteners, and landing gear used titanium alloys.
304 is a general-purpose stainless steel, which is widely used to make equipment and machine parts that require good overall performance (corrosion resistance and formability). In order to maintain the corrosion resistance inherent in stainless steel, the steel must contain more than 18% chromium and more than 8% nickel content.
With a density of 7.93g/cm3, it is also called 18/8 stainless steel in the industry. Resistant to temperatures up to 800 degrees, it has good processing properties and high toughness and is widely used in the industrial and furniture decoration industry and the food and medical industry. In terms of strength, low density, and corrosion resistance, titanium alloy is better.
