GRADE 15V-3Al-3Sn-3Cr
Titanium & Titanium Alloy Grades
GRADE 15V-3Al-3Sn-3Cr
Titanium Grade 15V-3Al-3Sn-3Cr, often referred to as Ti-15-3-3-3, is a high-strength, metastable beta titanium alloy known for its excellent formability and weldability, combined with a strong resistance to stress corrosion cracking. This alloy is specifically engineered for high-performance applications, particularly in the aerospace and automotive industries.
Common Grade 15V-3Al-3Sn-3Cr Products
Titanium Bar
Titanium Sheet
Key characteristics and properties of Titanium Grade 15V-3Al-3Sn-3Cr:
Composition
The chemical composition of Titanium Grade 15V-3Al-3Sn-3Cr is as follows:
- Titanium (Ti): Balance
- Vanadium (V): 15%
- Aluminum (Al): 3%
- Tin (Sn): 3%
- Chromium (Cr): 3%
Titanium Grade 15V-3Al-3Sn-3Cr (Ti-15-3-3-3) is a high-strength, metastable beta titanium alloy prized for its excellent formability, weldability, and resistance to stress corrosion cracking. It is a material of choice for demanding applications in aerospace, automotive, and other industries where high performance and light weight are critical.
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Key Characteristics
High Strength:
- Ti-15-3-3-3 is a high-strength alloy with a tensile strength that can exceed 1030 MPa (150 ksi) when fully heat-treated.
- Its strength-to-weight ratio makes it an ideal choice for applications where both high strength and light weight are critical.
Good Formability:
- One of the standout features of this alloy is its excellent formability, especially in the solution-treated condition.
- This makes it easier to work with during fabrication processes like forming, bending, and deep drawing.
Beta Phase Alloy:
- As a metastable beta alloy, Ti-15-3-3-3 can be heat-treated to achieve a range of mechanical properties.
- The beta phase allows for a balance between formability and high strength, which can be controlled through heat treatment.
Corrosion Resistance:
- The alloy offers good corrosion resistance, typical of titanium alloys, making it suitable for environments where resistance to corrosion is necessary.
- It is particularly resistant to stress corrosion cracking, a critical property for aerospace and other high-stress applications.
Weldability:
- Ti-15-3-3-3 exhibits excellent weldability, especially when compared to alpha-beta titanium alloys like Ti-6Al-4V.
- It can be welded without significant loss of strength or ductility, making it advantageous for complex fabrications.
Applications
Aerospace: Widely used in aerospace components, such as landing gear, airframe components, and fasteners, where high strength, low weight, and resistance to stress corrosion cracking are essential.
Automotive: Utilized in high-performance automotive components, including suspension springs and exhaust systems, where strength and weight savings are critical.
Sporting Goods: Used in high-end sporting equipment, such as golf clubs and bicycle frames, where a combination of light weight and durability is desired.
Medical Devices: Though less common, it is sometimes used in medical applications where high strength and good formability are needed, though biocompatibility is less than that of pure titanium or titanium alloys specifically designed for medical use.
Physical Properties
- Density: ~4.8 g/cm³, offering a favorable strength-to-weight ratio.
- Melting Point: Approximately 1670°C (3038°F), providing good thermal stability.
- Thermal Conductivity: Lower than many metals, which can be advantageous in applications requiring heat resistance.
Versus Grade 5 (Ti-6Al-4V): Ti-15-3-3-3 offers better formability and higher strength potential through heat treatment, though it may not be as widely used due to its more specialized nature.
Versus Grade 9 (Ti-3Al-2.5V): While both are used in aerospace and high-performance applications, Ti-15-3-3-3 provides significantly higher strength and better formability in the beta condition.
Versus Beta C (Ti-3Al-8V-6Cr-4Zr-4Mo): Both are beta titanium alloys, but Ti-15-3-3-3 is favored in applications requiring a balance of formability, weldability, and strength.
Limitations:
Cost: The high vanadium content and specialized nature of the alloy make it more expensive than many other titanium alloys.
Availability: It may be less commonly available compared to more widely used titanium grades like Grades 5 and 9.
Heat Treatment Sensitivity: The alloy requires precise heat treatment to achieve desired mechanical properties, necessitating careful control during processing.
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