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Introduction
Grade 9 titanium alloy,is an advanced α-type titanium alloy with a nominal composition of Ti-3Al-2.5V. It is developed for cold-processable pipe applications. Its strength is 20%-50% higher than pure titanium at room temperature and high temperature, and its welding performance and cold forming performance are better than TC4 alloy. The maximum operating temperature is approximately 315°C. Due to its lower Al- and V content,Grade 9 titanium alloy is also known as "Half 6-4". It is almost impossible to increase its strength through targeted heat treatment (age hardening). Its already excellent corrosion resistance can be further improved by adding small amounts of Pd (0.05%) or Ru (0.1%). Although the strength of Grade 9 is not as high as that of TC4 alloy, it is widely used because of its excellent cold working properties—in aircraft tubing for hydraulics and in athletic equipment.
Chemical components(%)
Composition | C | H | O | N | V | Al | Fe | Other element | Ti |
Min | \ | \ | \ | \ | 2.00 | 2.50 | \ | 0.4 | Balance |
Max | 0.08 | 0.015 | 0.15 | 0.03 | 3.00 | 3.50 | 0.25 |
ASTM B265 Mechanical properties
Rigidity | Tensile strength | Yield strength | Elongation |
15-17HRC | ≥620MPa | ≥530MPa | ≥20% |
Grade 9 Production Standard
Titanium alloy Grade 9 is available in: Bar, Billet, Castings, Extrusion, Plate, Sheet, Strip, Wire, Welding Wire, Rings and Forgings.
Strip,Sheet and Plate | ASTM B265 |
Pipes/Tubes | Seamless Pipe:ASTM B861 Welded Pipe:ASTM B862 Tubes for Condensers and Heat Exchangers:ASTM B338 |
Wires | ASTM B863 |
Bars and billets | ASTM B348 |
Forgings | ASTM B381 |
Applications
Aerospace:aircraft structural parts, engine components and other aerospace equipment.
Electric Power:components for power transmission lines, transformers and other electrical equipment.
Petrochemical:corrosion-resistant pipes, vessels and other equipment.
Ships:hull structures, propellers, etc.
Machinery:components for various mechanical equipment, such as gears, bearings, etc.
Electronics:high-precision components for electronic equipment.
Environmental protection:sewage treatment equipment, air purification equipment, etc.
Medical:medical devices and implants
Marine:Grade9 is also used in marine engineering,such as offshore platforms, submarine pipelines, etc.
Processing and Chlorate Manufacturing:Grade9 can be used in process industries,as well as for corrosion-resistant components in chlorate manufacturing processes.
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