Titanium Flanges & Fittings — Grade 1, 2, 5, 7 & 12
Titanium is around 45 % lighter than steel and is practically immune to seawater, wet chlorine and hypochlorite thanks to a stable, self-healing oxide film.
Teshi Group manufactures titanium flanges to ASTM B381 and fittings to ASTM B363 in commercially pure grades 1 and 2, the high-strength Ti-6Al-4V alloy (Grade 5), and the corrosion-enhanced grades 7 and 12, with full heat traceability.
Titanium — grades, chemistry and properties
Grades and ASTM / ASME specifications
| Grade | Forged flanges & fittings | Butt weld fittings | Plate | Pipe |
|---|---|---|---|---|
| Grade 1UNS R50250 · W.Nr. 3.7025 | ASTM B381 F-1 | ASTM B363 WPT1 | ASTM B265 Gr 1 | ASTM B861 / B862 Gr 1 |
| Grade 2UNS R50400 · W.Nr. 3.7035 | ASTM B381 F-2 | ASTM B363 WPT2 | ASTM B265 Gr 2 | ASTM B861 / B862 Gr 2 |
| Grade 5 (Ti-6Al-4V)UNS R56400 · W.Nr. 3.7165 | ASTM B381 F-5 | Machined from B381 / B348 | ASTM B265 Gr 5 | On request |
| Grade 7 (Ti-Pd)UNS R52400 · W.Nr. 3.7235 | ASTM B381 F-7 | ASTM B363 WPT7 | ASTM B265 Gr 7 | ASTM B861 / B862 Gr 7 |
| Grade 12UNS R53400 · W.Nr. 3.7105 | ASTM B381 F-12 | ASTM B363 WPT12 | ASTM B265 Gr 12 | ASTM B861 / B862 Gr 12 |
Chemical composition (weight %, maximum unless a range is given)
| Grade | C | Ni | Mo | N | V | Al | Pd | Fe | O | H |
|---|---|---|---|---|---|---|---|---|---|---|
| Grade 1 | 0.08 | — | — | 0.03 | — | — | — | 0.20 | 0.18 | 0.015 |
| Grade 2 | 0.08 | — | — | 0.03 | — | — | — | 0.30 | 0.25 | 0.015 |
| Grade 5 (Ti-6Al-4V) | 0.08 | — | — | 0.05 | 3.5–4.5 | 5.5–6.75 | — | 0.40 | 0.20 | — |
| Grade 7 (Ti-Pd) | 0.08 | — | — | 0.03 | — | — | 0.12–0.25 | 0.30 | 0.25 | — |
| Grade 12 | 0.08 | 0.6–0.9 | 0.2–0.4 | — | — | — | — | 0.30 | 0.25 | — |
Mechanical properties (minimum, room temperature)
| Grade | Tensile strength | Yield strength (0.2 %) | Elongation | Note |
|---|---|---|---|---|
| Grade 1 | 240 MPa (35 ksi) | 170 MPa (25 ksi) | 24 % | Highest ductility |
| Grade 2 | 345 MPa (50 ksi) | 275 MPa (40 ksi) | 20 % | Industrial workhorse |
| Grade 5 (Ti-6Al-4V) | 895 MPa (130 ksi) | 828 MPa (120 ksi) | 10 % | High strength |
| Grade 7 (Ti-Pd) | 345 MPa (50 ksi) | 275 MPa (40 ksi) | 20 % | Reducing acids |
| Grade 12 | 483 MPa (70 ksi) | 345 MPa (50 ksi) | 18 % | Hot brines |
Values are minimums and limits from the governing ASTM / ASME specifications, summarised for convenience. The current edition of the specification takes precedence; confirm requirements against your project specification.
Where it is used
- Chlor-alkali brine and wet chlorine lines
- Seawater cooling and desalination
- Naval and marine cooling and ballast systems
- Copper, nickel and cobalt autoclave leaching
- Offshore and subsea piping
Testing & certification
- Chemistry including interstitials (O, N, H) reported on the certificate
- Ultrasonic testing of forgings when specified
- Dimensional inspection to ASME B16.5 / B16.9
- Clean-room handling to avoid iron contamination
Titanium products we manufacture
All products
01OEM manufacturerWeld Neck Flanges
ASME B16.5 · ASME B16.47
02OEM manufacturerBlind Flanges
ASME B16.5 · ASME B16.47
03OEM manufacturerSlip-On Flanges
ASME B16.5 · EN 1092-1 Type 12
04OEM manufacturerButt Weld Elbows
ASME B16.9 · ASME B16.25
05OEM manufacturerButt Weld Tees
ASME B16.9 · ASME B16.25
06OEM manufacturerWeldolets & Sockolets
MSS SP-97 · ASME B16.11
Industries and projects
Defence, Shipbuilding & Marine
Where Titanium is specified
ViewIndustryChemical & Petrochemical
Where Titanium is specified
ViewIndustryWater Treatment & Desalination
Where Titanium is specified
ViewProjectsMega-projects & EPC supply
Project BOQs, shutdowns and annual rate contracts
ViewOther materials
FAQ
Titanium: common questions
Which ASTM specification covers titanium flanges?
Titanium flanges are forged to ASTM B381 (grades F-1 to F-12 and others), with dimensions to ASME B16.5 or B16.47. Butt weld fittings are made to ASTM B363 (WPT grades).
What is the difference between titanium Grade 2 and Grade 5?
Grade 2 (UNS R50400) is commercially pure titanium with 345 MPa minimum tensile strength and excellent corrosion resistance. Grade 5 (Ti-6Al-4V, UNS R56400) is an alloy with 895 MPa minimum tensile strength for high-stress parts.
When is titanium Grade 7 or Grade 12 used?
Grade 7 adds 0.12–0.25 % palladium for crevice corrosion resistance in hot reducing acids and brines. Grade 12 adds molybdenum and nickel for hot brine service at lower cost than Grade 7.
Does Teshi Group supply titanium flanges with 3.2 certification?
Yes. Titanium flanges and fittings are supplied with EN 10204 3.1 certificates, and with 3.2 certification witnessed by the third-party agency your order specifies.
Titanium grade data sheets
Titanium overview →Chemical composition, mechanical properties and PDF data sheet for each grade.
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