AMS 4901 Grade 4 Titanium Foil: Specification, Documentation and RFQ Guide

AMS 4901 Grade 4 titanium foil is a product-specific aerospace material reference used for Grade 4 titanium foil inquiries. The standard designation should be kept together with the grade, product form, dimensions, delivery condition, inspection evidence, and revision requested by the buyer. This guide explains the information that should accompany an AMS 4901 inquiry.

1. Product identity

State the complete identity as AMS 4901 Grade 4 titanium foil. Grade 4 is commercially pure titanium with a higher strength level than lower commercially pure grades, while retaining titanium’s corrosion-resistance characteristics. The exact specification revision, thickness range, width, length or coil condition, surface, and delivery condition should be confirmed before order release.

2. Specification and documentation fields

3. Where Grade 4 foil is used

Grade 4 foil is selected when a commercially pure titanium foil requires a higher strength level than lower grades while retaining corrosion resistance and a stable alpha titanium structure. The final application, forming route, temperature, stress state, and acceptance criteria must be reviewed against the customer’s design and process requirements.

4. Related Titanium Valley material pages

See the AMS 4901 Grade 4 titanium foil product page for the product-form reference. Related Grade 4 material examples include Grade 4 titanium foil and ASTM F67 Grade 4 titanium rod. These are separate product forms and standards; they should not be treated as interchangeable specifications.

5. FAQ

Is AMS 4901 Grade 4 foil the same as every Grade 4 titanium foil?
No. The grade name, product form, specification reference, revision, delivery condition, dimensions, and documents must all match.

What should an aerospace buyer request?
Request the specification revision, dimensional and surface requirements, heat/lot traceability, certificate, inspection records, and any drawing-specific acceptance criteria.

Can the foil be substituted with rod or wire?
No. Rod and wire are different product forms with different processing and dimensional requirements.

6. RFQ checklist

Include AMS 4901, Grade 4, foil dimensions, tolerances, surface and delivery condition, quantity, certificate and inspection requirements, destination, and delivery date. Submit the request through the Titanium Valley RFQ page.