Grade 12 titanium alloy (abbreviated as Gr12 or Gr.12) is a corrosion-resistant titanium alloy, a near-alpha alloy developed to improve the crevice corrosion performance of pure titanium. The chemical composition of the alloy contains 0.3% molybdenum (Mo) and 0.8% nickel (Ni). These alloying elements not only enhance the strength of the alloy, but also give it good resistance to crevice corrosion, especially in high temperature, low pH chloride environments or weakly reducing acids. The corrosion resistance of Grade 12 alloy is significantly better than that of pure titanium and close to that of TA9 alloy. In addition, Grade 12 alloy also has good process plasticity and welding properties, so it has been widely used in the chemical industry.
Grade 12 titanium alloys are given an “Excellent” rating because of their excellent weldability. It is a highly durable alloy that provides high strength under high temperature conditions. Grade 12 titanium has similar properties to 300 series stainless steel.
The alloy can be processed by hot or cold forming processes such as pressing, hydroforming, stretch forming or forging. Its malleability makes it very useful in many applications. The alloy’s high corrosion resistance also makes it important in manufacturing equipment for applications where crevice corrosion is a concern. The main products of Grade 12 titanium alloy include plates, rods, pipes, forgings and wires.
Chemical composition of titanium alloy Grade 12 (%)
Physical properties of titanium alloy Grade 12
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Grade 12 titanium alloy corrosion resistance properties
The addition of nickel can improve the crevice corrosion resistance of Grade 12 titanium alloy in hydrochloric acid solution. However, in reducing acids, the corrosion resistance of Ti-Ni alloy may be lower than that of pure titanium. This is because the presence of nickel may cause the alloy to have lower corrosion resistance to certain reducing acids.、
In order to improve the corrosion resistance of Grade 12 titanium alloy in reducing media, an appropriate amount of molybdenum can be added to the alloy. The addition of molybdenum can enhance the corrosion resistance of the alloy in reducing acids, thereby improving its overall corrosion resistance.
It should be noted that the corrosion resistance of titanium alloys is affected by many factors, including alloy composition, processing status, and usage environment. Therefore, in specific applications, the characteristics and usage conditions of the alloy need to be comprehensively considered to select the most suitable material.
Characteristics of Grade 12 Titanium Alloy
Grade 12 titanium alloy has the following characteristics:
Low Density: Titanium alloys have a lower density and are lighter than many other metal materials such as steel and aluminum, thus providing high strength while reducing weight.
High Strength: Grade 12 titanium alloy has excellent strength and can meet the strength requirements of many applications.
Excellent corrosion resistance: The alloy has good corrosion resistance and can resist the erosion of many corrosive media, including acidic and alkaline environments.
Low temperature resistance: Grade 12 titanium alloy still maintains good mechanical properties under low temperature conditions and has high toughness and strength.
High temperature resistance: Titanium alloy has a wider application temperature range, higher than aluminum alloy. Grade 12 titanium alloy can operate at high temperatures of 450-500°C for long periods of time. In the temperature range of 150-500°C, titanium alloy still has high strength and can be suitable for applications in high-temperature environments, with operating temperatures up to 500°C.
Overall, Grade 12 titanium alloy has low density, high strength and excellent corrosion resistance. It also has good low and high temperature performance.
Applications of Grade 12 Titanium Alloy
Grade 12 titanium alloy is widely used in the following fields:
Aerospace: used to manufacture compressor components, such as forged titanium fans, compressor discs and blades, cast titanium compressor casings, intermediate casings, bearing housings, etc. The high specific strength, corrosion resistance and low temperature resistance of titanium alloys make it an important material in the manufacturing of aerospace vehicles. It is used to manufacture various pressure vessels, fuel tanks, fasteners, instrument straps, frames and rocket shells. Body etc.
Chemical and Hydrometallurgy: Used in the manufacture of equipment such as chemical reactors, storage tanks, pipes and heat exchangers.
High-temperature chemical manufacturing: Suitable for manufacturing high-temperature reactors, furnaces, pipes and other equipment.
Marine engineering: used to manufacture marine platforms, ship components and marine exploration equipment, etc.
In general, Grade 12 titanium alloy has wide applications in aerospace, chemical industry, hydrometallurgy, high-temperature chemical manufacturing, marine engineering and other fields. Its excellent corrosion resistance, high strength and low temperature resistance make it an ideal choice for many industries. ideal choice for the field.