Grade 4 Titanium Foil: Material Properties and Applications
- Gr4 Titanium Foil
Grade 4 titanium foil may be considered where an unalloyed titanium product with specified mechanical properties is needed. The actual properties and component suitability depend on material condition, dimensions, fabrication and applicable acceptance requirements.
Grade and specification
Grade 4 is unalloyed titanium, UNS R50700. ASTM B265 covers annealed titanium strip, sheet and plate, including Grade 4, within its scope. Confirm the contracted edition and whether the ordered foil form and dimensions are covered. Define thickness, width, tolerance, delivery condition, surface and required lot documentation.
Chemistry and mechanical limits should be checked against the agreed specification and the material certificate. Values from another product, condition or thickness do not automatically apply to the order.
Strength, forming and fatigue
Tensile strength and elongation are measured under defined conditions and do not establish a finished component’s fatigue life, impact toughness or safe pressure. Forming depends on foil thickness, condition, rolling direction, bend geometry and tooling. Use representative trials and agree inspection for cracking, springback and edge quality.
| Requirement | Evidence to request |
|---|---|
| Material properties | Applicable specification, condition and supplied-lot test records. |
| Forming | Representative foil, geometry, tooling and acceptance criteria. |
| Fatigue or impact | Method, specimen, load and environment relevant to the part. |
| Corrosion | Medium, concentration, temperature, joints and exposure. |
Service and applications
Industrial, marine or aerospace parts have different loading and environmental requirements. Evaluate corrosion and temperature for the specific conditions rather than assuming a universal pH range or operating temperature. A high melting point does not establish long-term structural integrity at a particular service temperature.
For medical devices, the manufacturer must determine the appropriate material specification and independently evaluate the finished design, manufacturing, biological safety and regulatory requirements. A Grade 4 designation does not guarantee clinical performance or MRI safety.
Frequently asked questions
Does Grade 4 have a single fatigue value for every foil?
No. Fatigue depends on the material, specimen, surface, loading and environment.
Does ASTM B265 automatically qualify a finished device?
No. It is a material specification; device qualification is separate.
Explore the titanium foil category or request a quotation with the drawing, grade, dimensions and documentation requirements.
Published by: Titanium Valleys
Technical review: General Manager of the Production Department
Quality review: Quality Inspection Department
Last reviewed: October 20, 2026 (before the latest content update; the updated content is pending review).