Titanium Grade 19, commonly known as Titanium Beta-C, is a metastable beta titanium alloy developed for applications requiring very high strength, excellent corrosion resistance, and superior cold formability. Unlike alpha or alpha-beta alloys, Beta-C retains a fully beta microstructure at room temperature.
Material Classification
| UNS | R58640 |
|---|---|
| Alloy Type | Metastable Beta Titanium Alloy |
| Heat Treatable | Yes (Solution Treated & Aged) |
| Key Differentiator | High strength + cold formability |
Mechanical Properties (Typical)
| Property | Value |
|---|---|
| Tensile Strength | 1100 – 1400 MPa |
| Yield Strength | 1000 – 1250 MPa |
| Elongation | 8 – 12% |
| Density | ~4.85 g/cm³ |
Heat Treatment & Formability
✔ Fully heat treatable with excellent property control
✔ Outstanding cold formability in solution-treated condition
✔ Deep hardenability with uniform properties in thick sections
✔ Ideal for complex shapes and thin-section components
Corrosion Resistance
Titanium Grade 19 exhibits exceptional resistance to seawater, chlorides, reducing acids, crevice corrosion, and stress corrosion cracking. In many aggressive environments, it rivals or exceeds Grades 7 and 11.
Fabrication & Processing
✔ Weldable with inert shielding; post-weld heat treatment recommended
✔ Forged in beta field with excellent thermo-mechanical response
✔ Machining more demanding than Ti-6Al-4V due to higher strength
Applications
Aerospace: Structural components, landing gear parts, actuators, high-strength fasteners
Marine & Offshore: Seawater piping, subsea components, offshore fasteners
Chemical Processing: Heat exchangers, reactors, pressure vessels
High-Performance Engineering: Motorsport components, springs, precision parts
Advantages
✔ Very high strength at low weight
✔ Exceptional corrosion resistance
✔ Excellent cold formability (rare for high-strength Ti)
✔ Uniform properties in thick sections
✔ Good fatigue resistance
Beta-C vs Ti-6Al-4V
| Feature | Beta-C (Grade 19) | Ti-6Al-4V |
|---|---|---|
| Alloy Type | Beta | Alpha-Beta |
| Maximum Strength | Much higher | Lower |
| Formability | Excellent | Moderate |
| Corrosion Resistance | Excellent | Very good |
| Weight | Slightly higher | Lower |
Summary:
Titanium Grade 19 (Beta-C) uniquely combines very high strength, excellent corrosion
resistance, cold formability, and deep hardenability. It is widely used in aerospace,
marine, chemical, and high-performance engineering applications where strength,
durability, and manufacturability must coexist.