Titanium Alloys
Titanium Grade 2 (UNS R50400) — Composition, Properties & Supply
Titanium Grade 2 (UNS R50400, equivalent to Chinese TA2) is the most widely used commercially pure titanium grade with at least 98.9% Ti. It combines excellent corrosion resistance with good formability and weldability, and is the standard material for chemical equipment, desalination and heat exchangers.
What is the chemical composition of Titanium Grade 2?
| Element | Symbol | Content (wt%) |
|---|---|---|
| Ti | Ti | Balance |
| Fe | Fe | ≤ 0.30 |
| O | O | ≤ 0.25 |
| C | C | ≤ 0.08 |
| N | N | ≤ 0.03 |
| H | H | ≤ 0.015 |
Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.
What are the mechanical properties of Titanium Grade 2?
| Property | Value | Note |
|---|---|---|
| Tensile strength | ≥ 345 MPa | Room temperature |
| Yield strength (0.2% offset) | ≥ 275 MPa | Room temperature |
| Elongation | ≥ 20 % | Gauge length 50 mm / 4D |
| Hardness | ≤ 160 HB | Brinell / Rockwell |
What are the physical properties of Titanium Grade 2?
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ |
| Melting range | 1660–1675 °C |
| Thermal conductivity | 16.4 W/m·K |
| Elastic modulus | 103 GPa |
| Maximum service temperature | 425 °C |
What are the key characteristics of Titanium Grade 2?
- Density of only 4.51 g/cm³ for a high strength-to-weight ratio
- Excellent resistance to seawater, wet chlorine and oxidising media
- Easier to form and weld than Grade 5
- Biocompatible and cheaper than alloyed titanium
Where is Titanium Grade 2 used?
- Chemical heat exchangers, reactors and columns
- Desalination evaporators and condensers
- Chlor-alkali and wet chlorine equipment
- Marine and offshore piping
- Surgical instruments and implant housings
Which standards and specifications cover Titanium Grade 2?
What product forms are available?
Frequently asked questions
How does titanium Gr2 differ from 316L stainless in seawater?
316L is prone to crevice and pitting corrosion in seawater and usually needs velocity limits and regular cleaning. Titanium Gr2 forms a stable TiO₂ passive film and is essentially uncorroded in seawater, salt spray and wet chlorine, tolerating velocities above 30 m/s without coatings. Life-cycle cost is usually lower.
Why can't titanium be used in water-free methanol or fuming nitric acid?
Titanium relies on its surface oxide film. In strictly anhydrous reducing media such as dry methanol or dry chlorine, or in red fuming nitric acid with very high NOx, the film cannot be maintained and rapid corrosion or even pyrophoric reaction can occur. Use nickel alloys or run a dedicated evaluation for such service.
Need Titanium Grade 2 bar, tube, plate or forgings?
Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.
Request a Quote Chat on WhatsApp +86-156-1827-9078