When you source Grade 4 Medical Titanium Rods, choosing the right grade is only part of the job. You also need to define the material standard, rod dimensions, mechanical properties, surface condition, and inspection documents. These details help you compare suppliers and reduce problems during machining or device manufacturing.
Grade 4 titanium is commercially pure titanium with relatively high strength. It is designated UNS R50700 under ASTM F67. The standard covers unalloyed titanium products for surgical implant applications, including bars and billets. [1]
This guide explains how to specify an ASTM F67 Grade 4 titanium rod for medical applications. You can use the checklist when preparing a drawing, requesting a quote, or reviewing a supplier's material documents.
1. Confirm the Material Grade and Applicable Standard
Start by stating the exact material grade and governing standard on your purchase order. The phrase "medical titanium" alone does not define all the requirements.
For implant-related material, ASTM F67 Grade 4 Titanium Rod is a clear specification when ASTM F67 is the required standard. ASTM F67-24 covers chemical composition, mechanical properties, and metallurgical requirements for four grades of unalloyed titanium. Grade 4 corresponds to UNS R50700. [1]
You may also see these product descriptions:
- UNS R50700 Titanium Rod: Identifies the Grade 4 material designation.
- ASTM F67 Grade 4 Titanium Bar: Describes bar stock supplied to the relevant ASTM specification.
- Medical Grade 4 Titanium Bar: A commercial description that should be supported by the specified material standard.
- Medical Gr4 Pure Titanium Rod: A search term for Grade 4 commercially pure titanium rod.
These names may describe similar material, but the wording alone does not prove compliance. Ask the supplier to confirm the exact standard and revision.
You may also encounter ISO 5832-2 in medical titanium purchasing documents. Confirm which standard your design and quality system require. Do not assume that one standard automatically replaces another.
2. Check Whether Grade 4 Fits Your Application
Grade 4 is the highest-strength grade among the four commercially pure titanium grades covered by ASTM F67. Its strength makes it worth evaluating when a design needs unalloyed titanium with higher strength than Grades 1, 2, or 3. [1][2]
Grade selection still depends on the device design and required performance. A material name cannot determine suitability on its own.
When comparing Grade 4 with other materials, review:
Mechanical requirements: Check tensile strength, yield strength, elongation, and reduction of area.
Corrosion requirements: Consider the intended environment and relevant test evidence.
Machining needs: Confirm whether the rod can meet the finished component's dimensional and surface requirements.
Design conditions: Review loading, geometry, manufacturing steps, and the device's intended use.
Do not choose Grade 4 simply because it offers higher strength. Your engineering team should confirm that its properties fit the finished component.
3. Specify Diameter, Length, and Tolerances
A complete rod specification needs more than a nominal diameter. Define the dimensions that affect machining, material yield, and final component quality.
For STRX TITANIUM's Grade 4 Medical Titanium Rods, the listed product range is:
| Specification | Available range |
|---|---|
| Material | Grade 4 titanium |
| Standards listed | ASTM F67, ISO 5832-2 |
| Diameter | 4–100 mm, customizable |
| Length | 500–6,000 mm |
| Shape | Round bar |
| Surface | Polished or machined |
| Cutting | Custom cutting available |
Confirm the current production details and order requirements with the supplier before placing an order.
Your drawing or purchase specification should identify:
- Nominal diameter and permitted diameter tolerance.
- Required length and length tolerance.
- Straightness requirements, if applicable.
- Surface condition and roughness requirements, if specified.
- Whether you need standard lengths or cut-to-length pieces.
- Any additional inspection requirements for critical dimensions.
A tolerance that works for raw stock may not work for a finished medical component. Set the requirements according to your machining process and final drawing.
4. Review Chemical Composition and Mechanical Properties
Chemical composition and mechanical properties help you verify whether the supplied material meets the specified grade.
ASTM F67 sets limits for elements such as oxygen, iron, hydrogen, carbon, and nitrogen. These limits matter because interstitial elements and impurities influence titanium's mechanical behavior. [1][3]
For Grade 4 titanium, commonly published maximum composition limits include:
| Element | Maximum content by mass |
|---|---|
| Oxygen | 0.40% |
| Iron | 0.50% |
| Hydrogen | 0.015% |
| Carbon | 0.08% |
| Nitrogen | 0.05% |
| Titanium | Balance |
Use the applicable edition of ASTM F67 and the supplier's material test report to confirm the final acceptance limits.
Mechanical properties also require attention. ASTM F67 addresses tensile strength, yield strength, elongation, and reduction of area. The applicable requirements can depend on product form, dimensions, and material condition. [1]
When reviewing a quotation or technical datasheet, check that the stated values apply to the ordered rod. Avoid relying on a general Grade 4 datasheet when your order requires specific test results.
5. Define Surface Finish and Material Condition
Surface condition can affect machining, inspection, cleaning, and subsequent manufacturing steps. It should be part of the order specification.
STRX TITANIUM lists polished and machined surfaces for its Grade 4 medical titanium rods. If your drawing requires a different finish, confirm availability before ordering.
Your specification should state:
- Required surface finish or roughness, where applicable.
- Whether the supplier should deliver polished or machined stock.
- Any visible surface defects that require rejection.
- The required material condition, such as annealed or another specified condition.
- Any additional cleaning, packaging, or handling requirements.
- Do not assume that "polished" means a particular roughness value. State a measurable requirement if the finished component needs one.
Also distinguish the condition of the supplied rod from the condition of the finished component. Machining, heat treatment, and other manufacturing steps may affect the final properties.
6. Ask for the Right Inspection and Quality Documents
A supplier's description is not enough to verify material compliance. Request documents that connect the delivered material to your purchase requirements.
For an ASTM F67 Grade 4 Titanium Bar, ask the supplier to confirm which documents are available for the specific order.
Your document checklist may include:
- Material test report (MTR): Review the reported chemical composition and mechanical properties.
- Material identification: Confirm the grade, applicable standard, and heat or lot identification.
- Dimensional inspection: Check the measured dimensions against your order.
- Additional test reports: Specify any required tests and acceptance criteria before production.
- Traceability records: Confirm the identification system needed for your quality process.
ASTM F67 defines material requirements. It does not, by itself, establish that every finished medical device is approved for clinical use. The device manufacturer must assess the finished product against its applicable regulatory and quality requirements. FDA recognizes ASTM F67-24 as a consensus standard for medical devices. [4]
If your purchasing process requires third-party inspection or additional testing, state this in the request for quotation. Confirm the scope and acceptance criteria before production begins.
7. Prepare a Clear Request for Quotation
A detailed RFQ helps a titanium supplier quote the correct material and reduces repeated questions.
When requesting a quote for Grade 4 Medical Titanium Rods, provide:
- Grade and standard: Grade 4 / UNS R50700, with the required ASTM F67 edition or other applicable standard.
- Dimensions: Diameter, length, and dimensional tolerances.
- Surface condition: Polished, machined, or another defined finish.
- Quantity: Number of rods or total required weight.
- Documentation: Required MTR, traceability, inspection, and test reports.
- Application requirements: Any additional material or quality requirements approved by your engineering team.
- Delivery details: Destination, required delivery schedule, and packaging needs.
If you have a technical drawing, include it with the RFQ. The drawing can clarify tolerances and machining allowances that a simple size list may miss.
For sourcing teams, this information makes supplier quotations easier to compare. For engineers, it helps connect material purchasing with the actual component design.
8. Work With a Supplier That Understands Your Specification
Choosing a supplier involves more than comparing the price per kilogram. You also need clear communication about standards, dimensions, documentation, and order requirements.
STRX TITANIUM lists Grade 4 medical titanium rods in diameters from 4 to 100 mm and lengths from 500 to 6,000 mm. Custom dimensions and cutting services are available according to the product page. Confirm your exact requirements with the team before ordering.
For a quotation, send the material grade, required standard, diameter, length, quantity, surface finish, and documentation needs.
Contact STRX TITANIUM at info@strx-titanium.com to discuss your Grade 4 titanium rod requirements or request a quotation.
Frequently Asked Questions
Q: Is UNS R50700 The Same As Grade 4 Titanium?
A: Yes. ASTM F67 identifies Grade 4 unalloyed titanium as UNS R50700. [1]
Q: What Standard Applies To Grade 4 Medical Titanium Rods?
A: ASTM F67 covers unalloyed titanium for surgical implant applications. ISO 5832-2 is another standard listed for STRX TITANIUM's Grade 4 rods. Confirm the standard required for your project.
Q: What Sizes Are Available From STRX TITANIUM?
A: The listed range is 4–100 mm in diameter and 500–6,000 mm in length. Custom dimensions and cutting can be discussed with the supplier.
Q: What Documents Should I Request?
A: Request the material test report, grade and standard identification, and applicable dimensional or additional test reports. Define any special documentation requirements in your RFQ.
Q: Does ASTM F67 Compliance Certify The Finished Medical Device?
A: No. It addresses the specified titanium material. The finished device must meet its own applicable design, quality, and regulatory requirements.
Reference
1. ASTM International. ASTM F67-24: Standard Specification for Unalloyed Titanium, for Surgical Implant Applications (UNS R50250, UNS R50400, UNS R50550, UNS R50700). 2024.
2. ASTM International. ASTM F136: Standard Specification for Wrought Titanium-6Aluminum-4Vanadium ELI (Extra Low Interstitial) Alloy for Surgical Implant Applications.
3. ASTM International. ASTM B348/B348M: Standard Specification for Titanium and Titanium Alloy Bars and Billets.
4. U.S. Food and Drug Administration. Recognized Consensus Standards for Medical Devices: ASTM F67-24. 2025.
5. International Organization for Standardization. ISO 5832-2: Implants for Surgery-Metallic Materials-Part 2: Unalloyed Titanium.
6. ASM International. ASM Handbook, Volume 2: Properties and Selection-Nonferrous Alloys and Special-Purpose Materials. ASM International.