Titanium Grades Overview
Commercially pure grades (Gr1–Gr4) trade strength for formability; alpha-beta alloys (Gr5, Gr9, Gr23) do the opposite; Gr7 and Gr12 buy corrosion resistance in specific media. This hub links every grade page and the master table.
| Grade | UNS / Alloy | GB | Min tensile* | Signature property | Forms we quote |
|---|---|---|---|---|---|
| Gr1 | R50250 | TA1 | 240 MPa | Most formable CP | plate · tube |
| Gr2 | R50400 | TA2 | 345 MPa | Corrosion workhorse | all nine lines |
| Gr3 | R50500 | TA3 | 450 MPa | Between Gr2/Gr4 | plate · bar |
| Gr4 | R55400 | TA4 | 550 MPa | Strongest CP | plate · disc |
| Gr5 | R56400 | TC4 | 895 MPa | The alloy standard | bar · plate · rings · parts |
| Gr7 | R52400 | TA9 | 345 MPa | Pd for acids | plate · tube |
| Gr9 | R56320 | TC2 | 620 MPa | Weldable mid-strength | tube · bar · wire |
| Gr12 | R53400 | — | 483 MPa | Hot chloride | plate · tube |
| Gr23 | R56401 | TC4ELI | 860 MPa | ELI toughness | bar · wire |
How Titanium Grades Are Organised
CP (alpha): Gr1 → Gr4 — oxygen content rises, strength rises, ductility falls. Alpha-beta: Gr5 (Ti-6Al-4V) and its ELI twin Gr23, plus medium-strength Gr9. Corrosion-engineered: Gr7 (palladium) and Gr12 (Mo-Ni) for hot chlorides and reducing acids.
Quick Selection Rules (common practice)
- Seawater & chlorides at ambient temperature → Gr2 by default
- Hot brine / evaporator service → consider Gr12
- Reducing acids, chloride contamination in process streams → Gr7
- Machined parts needing strength-to-weight → Gr5; tougher thin sections → Gr23
- Deep drawing and forming → Gr1
Standard-minimum values above come from published ASTM specifications, not our own measurements. Application pages and the selection guide explain how to use them.