Titanium Grade 7 Pipe & Tube
Titanium Grade 7 Pipe & Tube supplied to the specified dimensions, condition, tolerance, inspection and material-traceability requirements for industrial procurement.
- Material
- Titanium Grade 7 / UNS R52400
- Standard
- ASTM B338, ASTM B861 or ASTM B862 as applicable
- Product Form
- Seamless or welded pipe/tube; OD or NPS, wall thickness, length and end condition are confirmed by RFQ
- Documents
- MTC, inspection and heat/lot traceability
Product Detail
Product Introduction
Titanium Grade 7 Pipe & Tube is supplied for corrosion-resistant fabrication and precision manufacturing. The final purchase definition must identify the exact material designation, governing specification and revision, dimensions, condition, tolerances, tests and documentation; trade-name or cross-standard equivalence is not assumed.
When is Grade 7 pipe or tube selected?
Selection answer: Grade 7 adds palladium to a CP titanium base and is selected for enhanced resistance in certain reducing-acid, crevice or aggressive process environments after corrosion review.
Selection boundary: Grade 7 is not automatically required for all seawater service and is not universally resistant to every acid. Selection must use real chemistry, temperature, aeration, contaminants and geometry.
RFQ data to confirm: Provide product standard and route, OD or NPS, wall, medium and concentration, temperature range, welding, NDT, pressure test and material certification.
Product Specifications
| Product | Titanium Grade 7 Pipe & Tube | Grade | Titanium Grade 7 / UNS R52400 |
|---|---|---|---|
| Standard | ASTM B338, ASTM B861 or ASTM B862 as applicable | Size & Form | Seamless or welded pipe/tube; OD or NPS, wall thickness, length and end condition are confirmed by RFQ |
| Tolerance | Governing material standard or approved customer drawing | Supply Condition | Annealed and pickled seamless or welded product with specified ends |
| Inspection | MTC review, dimensional and surface inspection, heat/lot traceability, with PMI or applicable NDT when specified | Documents | MTC, heat/lot traceability and agreed inspection reports |
Send the complete material RFQ
Include grade, specification revision, dimensions, tolerance, quantity, condition, tests and destination.
Chemical Composition
Weight percent; maximum unless a range is shown. Titanium is the balance. The ordered specification and grade control.
| Grade / UNS | Principal Alloying Elements | Fe max | O max | C max | N max | H max | Ti |
|---|---|---|---|---|---|---|---|
| Grade 1 / R50250 | — | 0.20 | 0.18 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 2 / R50400 | — | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 3 / R50550 | — | 0.30 | 0.35 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 4 / R50700 | — | 0.50 | 0.40 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 5 / R56400 | Al 5.50–6.75; V 3.50–4.50 | 0.40 | 0.20 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 6 / R54520 | Al 4.00–6.00; Sn 2.00–3.00 | 0.50 | 0.20 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 7 / R52400 | Pd 0.12–0.25 | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 9 / R56320 | Al 2.50–3.50; V 2.00–3.00 | 0.25 | 0.15 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 12 / R53400 | Mo 0.20–0.40; Ni 0.60–0.90 | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 11 / R52250 | Pd 0.12–0.25 | 0.20 | 0.18 | 0.08 | 0.03 | 0.0125 | Balance |
| Grade 16 / R52402 | Pd 0.04–0.08 | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 17 / R52252 | Pd 0.04–0.08 | 0.20 | 0.18 | 0.08 | 0.03 | 0.0125 | Balance |
| Grade 19 / R58640 | Al 3.00–4.00; V 7.50–8.50; Cr 5.50–6.50; Mo 3.50–4.50; Zr 3.50–4.50 | 0.30 | 0.12 | 0.05 | 0.03 | 0.015 | Balance |
| Grade 23 / R56407 | Al 5.50–6.50; V 3.50–4.50 | 0.25 | 0.13 | 0.08 | 0.05 | 0.0125 | Balance |
Mechanical Properties – Annealed Material Reference
| Grade | Ultimate Tensile Strength min | 0.2% Yield Strength min | Elongation min |
|---|---|---|---|
| Grade 1 | 240 MPa | 170 MPa | 24% |
| Grade 2 | 345 MPa | 275 MPa | 20% |
| Grade 3 | 450 MPa | 380 MPa | 18% |
| Grade 4 | 550 MPa | 483 MPa | 15% |
| Grade 5 | 895 MPa | 828 MPa | 10% |
| Grade 6 | 828 MPa | 793 MPa | 10% |
| Grade 7 | 345 MPa | 275 MPa | 20% |
| Grade 9 | 620 MPa | 485 MPa | 15% |
| Grade 12 | 483 MPa | 345 MPa | 18% |
| Grade 11 | 240 MPa | 170 MPa | 24% |
| Grade 16 | 345 MPa | 275 MPa | 20% |
| Grade 17 | 240 MPa | 170 MPa | 24% |
| Grade 19 / Beta-C | Acceptance depends on solution treatment, aging condition, product form and section size; use the certified values required by the invoked product or aerospace specification. | ||
| Grade 23 | 860 MPa | 795 MPa | 10% |
Representative minima only. Product form, section size, heat treatment and the invoked specification determine the certified acceptance values.
Typical Physical Properties
| Grade | Density | Elastic Modulus | Thermal Expansion |
|---|---|---|---|
| Grade 1 | 4.51 g/cm³ | Approx. 103 GPa | Approx. 8.6 µm/m·K |
| Grade 2 | 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 3 | 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 4 | 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 5 | 4.43 g/cm³ | Approx. 114 GPa | Approx. 8.6 µm/m·K |
| Grade 6 | Approx. 4.48 g/cm³ | Approx. 110 GPa | Approx. 8.8 µm/m·K |
| Grade 7 | Approx. 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 9 | Approx. 4.48 g/cm³ | Approx. 105 GPa | Approx. 9.0 µm/m·K |
| Grade 12 | Approx. 4.54 g/cm³ | Approx. 103 GPa | Approx. 8.6 µm/m·K |
| Grade 11 | Approx. 4.51 g/cm³ | Approx. 103 GPa | Approx. 8.6 µm/m·K |
| Grade 16 | Approx. 4.51 g/cm³ | Approx. 105 GPa | Approx. 8.6 µm/m·K |
| Grade 17 | Approx. 4.51 g/cm³ | Approx. 103 GPa | Approx. 8.6 µm/m·K |
| Grade 19 / Beta-C | Approx. 4.82 g/cm³ | Condition-dependent; use certified engineering data | Condition-dependent; verify for design |
| Grade 23 | 4.43 g/cm³ | Approx. 114 GPa | Approx. 8.6 µm/m·K |
Typical engineering references, not inspection acceptance limits.
Certificates & Inspection Records
Services We Can Provide
Product Packaging
Pipe and tube ends are capped, surfaces are wrapped where required, and bundles or export cases are identified by grade, size, heat and quantity. Typical export packaging for the same physical product form is shown below; final packing is confirmed for each order.
Application Scenarios
Chemical processing equipment
Material grade, dimensions, condition and inspection must be matched to the application requirements.
Marine and desalination systems
Material grade, dimensions, condition and inspection must be matched to the application requirements.
Industrial fabrication and precision components
Material grade, dimensions, condition and inspection must be matched to the application requirements.
Specification & Selection Notes
Product-standard boundary
Grade 7 is UNS R52400 unalloyed titanium with 0.12 % to 0.25 % palladium. ASTM B338 applies to seamless and welded condenser or heat-exchanger tube, ASTM B861 to seamless pipe, and ASTM B862 to welded pipe. These product scopes are different. The RFQ should identify the exact revision, Grade 7 rather than Grade 7H unless required, tube or pipe form, seamless or welded route, dimensions, condition, ends, testing and documentation.
Inspection and traceability
Verify Grade 7 / UNS R52400 heat identity and palladium content, the ordered standard and revision, construction route, chemistry and tensile results, OD or NPS, wall, length, condition, surface and ends, marking, MTC and heat/lot traceability. Pressure or leak testing, eddy-current, ultrasonic examination and supplementary corrosion testing should follow the applicable product standard and expressly defined acceptance criteria.
Selection boundary
Grade 7 is commonly evaluated for process environments where its palladium addition provides a documented advantage, but it is not a universal corrosion upgrade. Process composition, concentration, contaminants, temperature, flow, crevice geometry, pressure, welding and the equipment code should support both the alloy and the tube or pipe route.
Technical FAQ
When should Grade 7 tube be considered instead of Grade 2?
Consider Grade 7 when a corrosion assessment for the actual process chemistry and temperature supports the palladium-alloyed grade. A general claim of better corrosion resistance is not sufficient for selection.
Are Grade 7 and Grade 7H pipe interchangeable?
They share UNS R52400 and the same palladium range, but Grade 7H has a higher guaranteed minimum tensile strength. Use the exact grade required by the pressure design and governing code.
What information is needed to quote Grade 7 pipe or tube?
Provide standard and revision, Grade 7 / UNS R52400, tube or pipe form, seamless or welded route, OD or NPS, wall, length, condition, ends, process chemistry and temperature, testing, MTC, quantity and destination.
FAQ
What information is required to quote Titanium Grade 7 Pipe & Tube?
Provide the titanium grade, product form, dimensional standard or drawing, thread or critical dimensions, quantity, surface treatment, mating parts, service conditions and required inspection documents.
Which standards apply to Titanium Grade 7 Pipe & Tube?
ASTM B338, ASTM B861 or ASTM B862 as applicable
How are Titanium Grade 7 Pipe & Tube inspected?
MTC review, dimensional and surface inspection, heat/lot traceability, with PMI or applicable NDT when specified
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