Titanium castings combine low density with high strength and outstanding resistance to seawater and many chemicals. Titanium is a specialised branch of investment casting: molten titanium reacts with conventional shell materials and with air, so melting and pouring take place under vacuum or inert gas using dedicated shell systems.
Grades in this family
| Grade | Type | UNS | Standard | Tensile strength Rm, min. (MPa) | Yield strength Rp0.2, min. (MPa) |
|---|---|---|---|---|---|
| Ti Grade C-2 | Unalloyed titanium casting grade | R52550 | ASTM B367 | 345 | 275 |
| Ti-6Al-4V (C-5) | Alpha-beta titanium alloy Ti-6Al-4V | R56400 | ASTM B367 | 895 | 825 |
Minimum values (or ranges) for separately cast test bars as specified in
Casting and processing considerations
A brittle oxygen-enriched surface layer (alpha case) forms where metal and shell react and is normally removed by chemical milling. Hot isostatic pressing is widely specified to close internal shrinkage. Titanium casting is a specialised capability; availability, qualification and inspection scope must be confirmed for each project.
Reference data compiled from the cited standards for orientation. Always work from the current edition of the governing specification; values are not a guaranteed LOSTWAX delivery specification.