Grade 12 (UNS R53400) titanium round bar is a corrosion-resistant titanium alloy, classified as a near α type alloy with the nominal composition of Ti-0.3Mo-0.8Ni. By adding molybdenum (Mo) and nickel (Ni), its corrosion resistance is significantly enhanced, particularly in high-temperature, low pH chloride, or weakly reducing acid environments, demonstrating excellent crack resistance.
It complies with STM B348-2013: Core Standard for Titanium and Titanium Alloy Bars, which covers requirements for chemical composition, mechanical properties, dimensional tolerances, etc.
GB/T 2965-2023: Chinese National Standard, replacing the 2007 version, updates inspection methods and technical requirements.
Product parameter
Density: 4.5–4.51 g/cm³, approximately 60% of steel, with excellent specific strength.
Melting point: 1660–1725℃ (varies due to purity differences from different sources).
Thermal conductivity: 15.24 W/(m·K) (at room temperature), decreases by about 50% at high temperatures.
Elastic modulus: 103 GPa (at room temperature).
Tensile strength range: ≥485 MPa.
Yield strength: ≥345 MPa.
Elongation: ≥18%.
Chloride environment: shows significantly better resistance to crevice corrosion in hot brine (pH ≥ 3) compared to pure titanium (Gr.2), approaching the level of Gr.7 (titanium-palladium alloy).
Processing technic
Diameter range: Φ6mm~Φ600mm. Length range: 300mm~600mm.
Diameter tolerance: ±0.13mm~±0.28mm, ovality tolerance: 0.20mm~0.41mm, depending on the diameter range.
Surface treatment: Various surface treatments are available, including polishing, acid washing, and spin coating, to enhance quality and corrosion resistance.
Main application areas
Aerospace: Gr.12 titanium alloy is widely used in the manufacture of combustion chambers, nozzles, and other components for aircraft engines, as well as structural parts and components for spacecraft due to its high strength and corrosion resistance.
Chemical Industry: In environments with high temperatures, high pressures, and strong corrosive conditions, Gr.12 titanium alloy is used to manufacture pipes, valves, pumps, and other components in chemical equipment.
Marine Engineering: Its excellent seawater corrosion resistance makes it suitable for deep-sea submersibles, submarines, underwater power stations, and other marine engineering equipment.
Medical Field: Due to its biocompatibility and high strength, Gr.12 titanium alloy is used to manufacture artificial bones, artificial joints, and other medical devices.
Automotive Industry: Its lightweight and high-strength characteristics make it suitable for manufacturing engine components, body structures, and more in automotive production.
Construction Field: Gr.12 titanium alloy can be used to manufacture large curved roofs and other architectural decorative materials.
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