What temperature is Grade 2 titanium annealing?
Dec 10, 2025
What is GR2 titanium material?
Titanium Grade 2, traded as UNS R50400, combines ductility and excellent corrosion resistance with high tensile strength. Titanium Grade 2 plates are renowned as a mainstay material in many industries, their superior corrosion resistance enabling them to function effectively in both strongly oxidizing and weakly reducing environments. Nevertheless, most of our customers prefer to use this alloy in high-temperature environments, as Titanium Grade 2 can be used in continuous operation at temperatures up to 800°F (approximately 427°C). Furthermore, this metal performs exceptionally well in intermittent use, maintaining stable operation even at temperatures up to 1000°F (approximately 538°C).
What temperature is Grade 2 titanium annealing?
| Process | Temperature Range | Key Purpose | Resulting Condition |
|---|---|---|---|
| Full Annealing | 700°C - 760°C (1292°F - 1400°F) |
Recrystallize, maximize ductility & corrosion resistance, relieve all stress. | Soft (Annealed) - Standard spec condition. |
| Stress Relieving | 480°C - 595°C (900°F - 1100°F) |
Remove internal stresses from welding/cold work without full recrystallization. | Hard/Strong (Cold Worked Temper) - Retains higher strength. |
| Process Criticality | Atmosphere Control: Must use argon/vacuum to prevent alpha case formation and embrittlement. |
Chemical Composition
| Element | Percentage | Range |
| Titanium (Ti) | Balance | |
| Carbon (C) | 0.08% | Max |
| Oxygen (O) | 0.25% | Max |
| Nitrogen (N) | 0.03% | Max |
| Hydrogen (H) | 0.015% | Max |
| Iron (Fe) | 0.30% | Max |
| Other Elements – Total | 0.4% | Max Total |
| Other Elements – Each | 0.1% | Max Each |
Physical Properties
| Property | English Value | SI Value |
| Density | 0.163 lb/in3 | 4.51 g/cm3 |
| Beta Transus | 1680 °F | 915 °C |
| Thermal Conductivity | 12.60 Btu / (hr ft °F) | 21.79 W / (m °K) |
| Electrical Resistivity | 21 µΩ*in | 0.53 µΩ*m |
| Magnetic Permeability | Nonmagnetic | Nonmagnetic |
Mechanical Properties
| Tensile Requirements | English | Metric |
| Tensile Strength, min | 50 ksi | 345 MPa |
| Yield Strength (0.2% Offset), min | 40 ksi | 275 MPa |
| Elongation in 4D, min | 20 % | |
| Reduction of Area, min | 30% | |
What Is the Difference Between Gr2 and Gr7 Titanium?
While both Gr2 and Gr7 are commercially pure titanium, the key difference is the addition of palladium (0.12-0.25%) in Gr7, which enhances corrosion resistance in extreme environments. Gr2 is already highly resistant to corrosion, making it ideal for marine, aerospace, and chemical processing applications. With moderate strength (344 MPa tensile strength) and excellent weldability, it is widely used in less aggressive environments.
Gr7, however, provides superior resistance to highly acidic and oxidizing conditions, such as those found in chemical processing plants, nuclear power facilities, and offshore structures. Although Gr7 shares similar mechanical properties with Gr2, its enhanced corrosion resistance makes it the preferred choice for environments where Gr2 may not provide long-term durability.
Gr7 is recommended for extreme conditions where corrosion is a major concern, while Gr2 is a cost-effective option for general corrosion resistance.
| Property | Gr2 Titanium | Gr7 Titanium |
|---|---|---|
| Strength | Moderate (344 MPa) | Moderate (345 MPa) |
| Corrosion Resistance | Excellent | Superior (due to palladium) |
| Best Used In | Marine, aerospace, chemical processing | Extreme chemical environments |
why choose us
We provide a comprehensive range of titanium materials and fabricated parts, including:
Titanium Tubes & Pipe: Seamless and welded tubing in commercial and aerospace grades (Gr1, Gr2, Gr5, Gr7, Gr9, Gr12), suitable for heat exchangers, condenser tubes, and piping systems.
Titanium Bars & Rods: Round bars, hex bars, and square bars in hot-rolled, forged, and cold-drawn conditions, available in various diameters and lengths.
Titanium Plate & Sheet: Plates, sheets, and strips in standard and custom dimensions, ideal for pressure vessels, chemical processing, and marine applications.
Titanium Wire & Foil: Fine wire for welding, fasteners, and medical applications, alongside ultra-thin foil for specialized industrial uses.
Precision Titanium CNC Machining Parts: Custom-engineered components, fittings, flanges, fasteners, and intricate parts machined from titanium billets, bars, or plates with tight tolerances.
For quotes, technical specifications, or to discuss your project requirements for titanium tubes, bars, plates, sheets, wire, foil, or custom CNC machined components, please contact our team.
Email us at: info@gneemetal.com
