Titanium Grade 7 (UNS R52400) — Chemical Composition & Mechanical Properties
Titanium Grade 7 (UNS R52400) is a titanium grade for titanium forgings, fittings & pipe (UNS R52400, EN / W.Nr 3.7235). It is also known as Ti-0.15Pd. This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group manufactures flanges and fittings in this grade.
Titanium Grade 7 (UNS R52400) at a glance
| Specification | Titanium Grade 7 (UNS R52400) |
|---|---|
| Material family | Titanium |
| Product form | Titanium forgings, fittings & pipe |
| UNS number | R52400 |
| EN / W.Nr equivalent | 3.7235 |
| Also known as | Ti-0.15Pd |
| Document | TG-MG-095 · Rev. 1 · October 2026 |
Typical service
Reducing acids and hot brine where Grade 2 would suffer crevice corrosion
Heat treatment
Annealed
Chemical composition of Titanium Grade 7 (UNS R52400) (weight %)
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 345 MPa |
|---|---|
| Yield strength (0.2 % offset), min | 275 MPa |
| Elongation, min | 20 % |
| Yield strength, max | 450 MPa |
| Hardness | Not specified |
About titanium
Titanium forms a stable oxide film that makes it practically immune to seawater, chlorides, wet chlorine and many oxidising acids. It is about 45 % lighter than steel for similar strength, which matters offshore and in heat-exchanger service.
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
International equivalents of Titanium Grade 7 (UNS R52400)
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — specification | Titanium Grade 7 (UNS R52400) |
| USA — UNS | R52400 |
| Europe — EN designation | Ti Grade 7 (Ti-0.15Pd) |
| Europe — W.Nr | 3.7235 |
| Japan — JIS | TTP340Pd / Class 12 (JIS H4630) |
| China — GB / NB | TA9 (GB/T 3624) |
| China — old GB designation | TA9 |
Equivalents are the nearest commonly cited grades. Chemistry, mechanical properties and testing differ between standards — compare them before substituting one for another.
Same alloy in other product forms
| Product form | Specification / grade |
|---|---|
| Flanges & forgings | ASTM B381 F-7 |
| Butt-weld fittings | ASTM B363 WPT7 |
| Seamless pipe | ASTM B861 Grade 7 |
| Welded pipe | ASTM B862 Grade 7 |
| Plate | ASTM B265 Grade 7 |
| Bar | ASTM B348 Grade 7 |
Standards for Titanium Grade 7 (UNS R52400)
All material standardsFAQ
Titanium Grade 7 (UNS R52400): common questions
What is the minimum yield strength of Titanium Grade 7 (UNS R52400)?
275 MPa, with a minimum tensile strength of 345 MPa.
What is the carbon content of Titanium Grade 7 (UNS R52400)?
0.08 max %.
What is the UNS number and EN equivalent of Titanium Grade 7 (UNS R52400)?
UNS R52400; the nearest European designation is W.Nr 3.7235. Equivalents are close but not identical — check the specification if substituting.
How is Titanium Grade 7 (UNS R52400) heat treated?
Annealed.
What is the Chinese (GB) equivalent of Titanium Grade 7 (UNS R52400)?
The nearest Chinese equivalent is TA9 (GB/T 3624), formerly TA9. Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of Titanium Grade 7 (UNS R52400)?
The nearest Japanese (JIS) equivalent is TTP340Pd / Class 12 (JIS H4630).
Does Teshi Group supply Titanium Grade 7 (UNS R52400)?
Teshi Group manufactures flanges and fittings in this grade. Send your size, rating and quantity to info@teshigroup.com for a quotation with EN 10204 3.1 certificates.
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