Titanium Grade 7 Bar | UNS R52400

2. Material Designation: Titanium Grade 7, UNS R52400, commercially pure titanium containing 0.12–0.25% palladium.

3. Standard Requirements: Chemical composition, tensile properties, dimensions, tolerances, workmanship, marking, sampling, testing, and certification shall follow the applicable product standard and purchase order.

4. Additional Requirements: Project-specific inspection, tighter tolerances, machining, surface finish, marking, packaging, and documentation can be agreed before production.

5. Inspection Documents: Material Test Certificates, inspection reports, heat and lot traceability, and EN 10204 3.1 documentation can be supplied when contractually required.

2. UNS Designation: UNS R52400.

3. Nominal Alloy Description: Ti-0.2Pd, a palladium-enhanced commercially pure titanium grade.

4. Palladium Range: 0.12–0.25% under ASTM B348/B348M requirements.

5. Supply Condition: Annealed unless another condition is specifically agreed and permitted by the purchase specification.

6. Selection Note: Titanium Grade 7 is a separate material grade and should not be substituted with Grade 2, Grade 11, Grade 12, Grade 16, or another titanium grade without technical and purchaser approval.

2. Delivery Options: Full-length bars, cut-to-length pieces, machining blanks, and project-specific quantities.

3. Custom Supply: Diameter, length, tolerance, finish, marking, and inspection requirements can be reviewed according to drawings and purchase specifications.

4. Product-Form Boundary: ASTM B348/B348M applies to bars and billets. Titanium Grade 7 tube, pipe, plate, sheet, and forgings require their own applicable product standards and should be ordered on separate specifications.

1. Palladium (Pd): 0.12–0.25

2. Iron (Fe): ≤0.30

3. Oxygen (O): ≤0.25

4. Carbon (C): ≤0.08

5. Nitrogen (N): ≤0.03

6. Hydrogen (H): ≤0.015

7. Residual Elements (each): ≤0.10

8. Residual Elements (total): ≤0.40

9. Titanium (Ti): Balance

The heat analysis and product analysis shall be verified against the applicable standard, purchase order, and Material Test Certificate.

2. Minimum 0.2% Offset Yield Strength: 275 MPa.

3. Minimum Elongation: 20%, subject to the applicable specimen and product-size requirements.

4. Verification: Reported mechanical properties shall be based on the applicable ASTM B348/B348M test requirements and linked to the supplied heat or lot.

5. Design Note: These room-temperature material properties do not independently establish allowable design stress, fatigue life, pressure capacity, corrosion life, or suitability for a finished component.

2. Length: Standard mill lengths and custom cut lengths can be reviewed according to the purchase order.

3. Dimensional Basis: Diameter, length, straightness, out-of-roundness, and cut-end requirements shall follow ASTM B348/B348M unless tighter requirements are agreed in writing.

4. Custom Tolerances: Tighter tolerances require a feasibility review covering bar diameter, length, finish, machining allowance, inspection method, and measurement uncertainty.

5. Quotation Requirement: Buyers should state the finished component size and required machining allowance rather than specifying an unnecessarily tight raw-bar tolerance.

2. Cutting Services: Saw cutting and cut-to-length supply can be arranged according to agreed length tolerances.

3. Machining Services: Facing, chamfering, turning, drilling, and CNC machining can be reviewed against customer drawings.

4. Surface Acceptance: Bars shall be free from injurious defects that make the material unsuitable for the intended fabrication or violate the applicable standard and purchase specification.

5. Repair and Rework: Grinding, blending, or other surface rework shall not reduce the product below the agreed dimensional limits and must follow the approved acceptance requirements.

2. Diameter and out-of-roundness can be checked using calibrated micrometers, calipers, or other suitable measuring equipment.

3. Length, cut-end condition, surface finish, and quantity shall be verified before final release.

4. A detailed dimensional report can be provided when the inspection characteristics, sampling frequency, measuring method, and acceptance limits are specified in advance.

5. Precision-ground bars should be evaluated separately from hot-worked or peeled bars because manufacturing route, achievable tolerance, finish, cost, and lead time differ.

2. Optional PMI: Positive Material Identification can be arranged when required to verify material identity.

3. Optional Ultrasonic Testing: UT can be arranged when required by the purchase specification and when a suitable method, reference standard, coverage, and acceptance criteria are agreed.

4. Optional Hardness Testing: Hardness testing can be added when technically relevant and contractually specified.

5. Third-Party Inspection: Independent inspection can be coordinated at agreed hold or witness points.

6. Method Boundary: Eddy-current and hydrostatic testing are tube-related controls and are not presented as standard acceptance tests for a Titanium Grade 7 bar order.

2. Heat number and lot identification linked to product labels, packing list, and inspection records.

3. EN 10204 3.1 documentation when specified in the contract.

4. Dimensional, PMI, UT, hardness, or third-party inspection reports when ordered.

5. Heat-treatment condition and applicable product standard identified on the certification package.

6. Documentation should be reviewed against the physical product, purchase order, and approved deviations before release.

2. Material selection must consider the complete chemical composition, concentration, temperature, oxidizing or reducing condition, contaminants, flow, deposits, crevice geometry, galvanic coupling, fabrication, and cleaning process.

3. Titanium Grade 7 should not be described as immune to all acids, chlorides, wet chlorine conditions, sour environments, pitting, or crevice corrosion.

4. Published corrosion data and previous service experience should be matched to the actual project conditions. Additional testing or a materials-engineering review may be required for uncertain or severe service.

5. Approval of the raw bar does not automatically approve the final machined, welded, heat-treated, or pressure-containing component.

1. Valve stems, shafts, pins, spacers, and support components.

2. Pump, mixer, agitator, and fluid-handling equipment parts.

3. Fasteners, tie rods, fittings, and custom-machined hardware.

4. Components used around chemical-processing, chlor-alkali, hydrometallurgical, marine, desalination, and heat-transfer equipment.

5. Custom parts manufactured according to approved drawings and service requirements.

Application examples are preliminary screening references and do not replace project-specific material approval.

2. Protective separators, moisture-resistant wrapping, and end protection can be added when required.

3. Different heats or lots can be separated and clearly identified.

4. Product labels can include grade, UNS number, standard, size, heat number, lot number, quantity, and purchase-order reference.

5. Packaging requirements for ground or polished bars should be agreed separately to reduce rubbing, scratching, moisture exposure, and transit damage.

2. Supply support for standard and project-specific titanium bar requirements.

3. Review of grade, standard, size, tolerance, finish, inspection, documentation, and packing before quotation.

4. Material traceability and inspection documentation according to agreed purchase requirements.

5. PMI, ultrasonic, dimensional, surface, mechanical, and third-party inspection support when specified.

6. Cut-to-length, surface finishing, machining coordination, and export packaging services subject to technical review.

7. Direct communication for drawings, specifications, delivery requirements, and quotation clarification.

1. Material grade and UNS designation.

2. Applicable ASTM, ASME, EN, or project specification.

3. Bar diameter, length, quantity, and unit of measurement.

4. Annealed condition or other required delivery condition.

5. Diameter, length, straightness, and surface-finish requirements.

6. Required machining allowance or finished-component drawing.

7. Inspection and documentation requirements.

8. Marking, packaging, destination, Incoterms, and required delivery date.

9. Application environment when material-selection support is requested.

Does ASTM B348/B348M cover Titanium Grade 7 tubes?
No. ASTM B348/B348M covers bars and billets. Tube, pipe, sheet, plate, and forging orders require the appropriate product-form standard.

Can Titanium Grade 7 bar be supplied to custom sizes?
Custom diameters, lengths, finishes, and tolerances can be reviewed, but feasibility depends on the selected production route, order quantity, inspection method, and material availability.

Can Grade 7 be approved from the application name alone?
No. The complete environment, temperature, fabrication process, component design, and applicable code must be evaluated.

Which documents are available?
Material Test Certificates, heat and lot traceability, EN 10204 3.1 documentation, and ordered inspection reports can be supplied according to the contract.