AMS 4928 Titanium Grade 5
Standard: AMS 4928 (Aerospace Grade)
Grade: Ti-6Al-4V (Grade 5 / UNS R56400), Annealed
Mechanical Properties: Tensile ≥ 135 ksi · Yield ≥ 125 ksi
Forms & Sizes: Bars, Wire, Forgings · Up to 254mm (10")
Certification: EN 10204 3.1 MTC (with full heat traceability)
AMS 4928 Titanium Grade 5 is a specification covering annealed Ti-6Al-4V (UNS R56400) titanium alloy in the form of bars, wire, forgings, flash-welded rings, and drawn shapes. This alpha-beta alloy is the workhorse of the aerospace industry, delivering an exceptional combination of high strength, low density, and excellent corrosion resistance for critical applications including airframe components, jet engine parts, and high-performance fasteners.
As a direct AMS 4928 titanium supplier, we produce and export annealed Grade 5 titanium products with full compliance to the latest AMS 4928 revision, batch-specific mill test certificates, and worldwide delivery. Whether you need Ti-6Al-4V bars for machining or AMS 4928 forgings for aerospace structural parts, we help you match the right form, size, and certification to your project.
Send your specifications — receive a quotation and MTC sample within 24 hours.
Key Features & Advantages
- Aerospace-Grade Compliance: Certified to AMS 4928, ensuring strict control over chemistry and mechanical properties for flight-critical parts.
- Optimized Annealed Condition: Supplied annealed for excellent machinability, with the option for subsequent heat treatment to achieve higher strength.
- Superior Strength-to-Weight Ratio: Delivers high tensile and yield strength (120–125 ksi min) at roughly 45% lighter than steel, ideal for aerospace structural weight reduction.
- Elevated Temperature Stability: Reliable performance up to 400°C (750°F) with excellent fatigue and crack-propagation resistance.
- Full Heat-Number Traceability: EN 10204 3.1 MTC provided standard, fully supporting AS9100 and NADCAP quality audits.
- Versatile Product Forms: Available in bars, wire, and forgings to streamline your procurement process.
Product Specifications
| Parameter | Specification |
|---|---|
| Standard | AMS 4928 (Annealed 6Al-4V Bars, Wire, Forgings, Rings, Drawn Shapes) |
| Grade | Ti-6Al-4V (Grade 5 / UNS R56400) |
| Condition | Annealed (per AMS 4928) |
| Product Forms | Round bars, square bars, hex bars, wire, forgings, flash-welded rings |
| Size Range | Bars up to 254 mm (10.000") diameter or thickness; forgings per drawing |
| Density | 4.43–4.47 g/cm³ |
| Max Service Temperature | ~400°C (750°F) |
| Surface Finish | As-rolled, pickled, machined, or ground per request |
| Packaging | Wooden cases, bundled bars, or custom per customer requirement |
| Customization | Custom sizes, cut-to-length, and third-party inspection (SGS/TÜV/BV) available |
Chemical Composition (AMS 4928)
Weight % unless otherwise specified. Limits are maximum unless a range is shown.
| Element | Min (%) | Max (%) |
|---|---|---|
| Aluminum (Al) | 5.50 | 6.75 |
| Vanadium (V) | 3.50 | 4.50 |
| Iron (Fe) | — | 0.30 |
| Oxygen (O) | — | 0.20 |
| Carbon (C) | — | 0.08 |
| Nitrogen (N) | — | 0.05 |
| Hydrogen (H) | — | 0.0125 |
| Other Elements, each | — | 0.10 |
| Other Elements, total | — | 0.40 |
| Titanium (Ti) | \multicolumn{2}{c | }{Balance} |
Mechanical Properties (AMS 4928 Annealed)
Minimum requirements per AMS 4928 for annealed Ti-6Al-4V.
| Size Range | Tensile Strength (min) | Yield Strength (0.2% offset) | Elongation (min) | Reduction of Area (min) |
|---|---|---|---|---|
| Thru 2" (50.8 mm) | 135 ksi (930 MPa) | 125 ksi (860 MPa) | 10% | 25% |
| Over 2" thru 4" | 130 ksi (895 MPa) | 120 ksi (825 MPa) | 10% | 25% |
| Over 4" thru 6" | 130 ksi (895 MPa) | 120 ksi (825 MPa) | 10% | 20% |
Note: Mechanical properties vary by product form and section size. Confirm requirements at quotation.
Manufacturing Process
Our AMS 4928 Grade 5 titanium products are manufactured through controlled processes to ensure specification compliance:
1. Raw Material Selection
High-purity titanium sponge and master alloys (Al-V) are verified for chemistry before melting, ensuring low interstitial content and consistent alloy composition.
2. Vacuum Arc Remelting (VAR)
Multiple VAR melts produce homogeneous ingots with controlled chemistry and minimal segregation, critical for aerospace-grade Ti-6Al-4V.
3. Forging / Rolling
Ingots are forged or rolled above and below the beta transus to refine grain structure and achieve the desired product form. Processing parameters are controlled to meet AMS 4928 mechanical property requirements.
4. Annealing
Material is annealed per AMS 4928 requirements (typically 700–785°C) to relieve internal stress and achieve the specified annealed condition.
5. Finishing
Bars are peeled, ground, or machined to final dimensions. Surface condition is inspected for defects that could affect machinability or part integrity.
6. Inspection & Certification
Each lot undergoes chemical analysis, mechanical property testing, and dimensional inspection. EN 10204 3.1 MTC is issued with heat number traceability.
Quality Assurance & Testing
We operate a lot-by-lot release system—no material ships without passing full AMS 4928 compliance testing.
- Chemical composition by ICP-OES or combustion analysis (O/N/H)
- Tensile testing per ASTM E8 to verify AMS 4928 mechanical properties
- Hardness testing (Rockwell C, typical 30–34 HRC in annealed condition)
- Microstructure evaluation for alpha-beta phase distribution and absence of deleterious phases
- Dimensional inspection per order requirements
- Ultrasonic inspection available for forging stock and critical bar applications upon request
- Third-party inspection (SGS, TÜV, Bureau Veritas) arranged at buyer's request
- Documentation provided: EN 10204 3.1 Mill Test Certificate (MTC) with heat number, chemical and mechanical test reports, and dimensional certification.
Applications
Aerospace & Aviation
Grade 5 AMS 4928 material is specified for compressor blades, discs, rings, airframe structural components, fasteners, and helicopter rotor hubs where high strength-to-weight ratio and fatigue resistance are essential.
Medical Devices (Non-Implant)
Surgical instrument components, MRI equipment structures, and rehabilitation device parts benefit from Grade 5's biocompatibility and corrosion resistance.
Industrial & Marine
Pump and valve components, offshore equipment, and chemical processing hardware utilize Grade 5's resistance to seawater and oxidizing acids.
High-Performance Automotive & Motorsport
Connecting rods, suspension components, and exhaust systems in racing applications leverage the alloy's high strength and low weight.
Why Choose Us?
AMS 4928 Compliance, Verified
We supply material certified to the latest AMS 4928 revision, with mechanical test reports confirming yield strength of at least 120–125 ksi depending on section size. No "equivalent" substitutions.
Full Product Form Coverage
Whether you need bar stock for CNC machining, wire for fastener production, or forgings for structural components, we supply the form and condition that matches your manufacturing process.
Aerospace Documentation Support
We understand AS9100 and NADCAP requirements. Our MTCs include heat number traceability, and we support third-party inspection and source inspection arrangements.
Export-Ready Packaging
Titanium bars and forgings are protected against transit damage with proper bundling, end protection, and seaworthy wooden case packaging.
FAQ
Q1: What does AMS 4928 cover?
AMS 4928 is the SAE Aerospace Material Specification covering annealed Ti-6Al-4V (6Al-4V) titanium alloy in the form of bars, wire, forgings, flash-welded rings, and drawn shapes. It specifies chemical composition, mechanical properties (minimum 120–125 ksi yield depending on section size), and inspection requirements for aerospace applications.
Q2: What is the difference between AMS 4928 and ASTM B348?
Both cover Ti-6Al-4V bars and forgings, but AMS 4928 is the aerospace-grade specification with more stringent testing and traceability requirements. ASTM B348 is the general industrial specification. For aerospace applications, AMS 4928 is typically required.
Q3: Is AMS 4928 material supplied in annealed condition?
Yes. AMS 4928 specifies the annealed condition as the delivery condition. This provides good machinability and ductility. The material can subsequently be solution treated and aged to achieve higher strength if the application requires it.
Q4: What is the maximum size available for AMS 4928 bars?
AMS 4928 covers bars up through 10.000 inches (254 mm) in diameter or least distance between parallel sides. For sizes beyond this or for custom forgings, please contact us with your requirements.
Q5: Can you provide material for aerospace source inspection?
Yes. We support customer source inspection and third-party inspection (SGS, TÜV, Bureau Veritas) at our facility or via pre-shipment arrangements. Please specify inspection requirements at quotation.
Q6: What is your MOQ and lead time?
MOQ varies by product form and size—typically 100 kg for standard bar sizes. Lead time is 3–4 weeks for stock items; 6–8 weeks for custom forgings or non-standard sizes. Confirmed at quotation.
Contact Us
Ready to source AMS 4928 Grade 5 titanium for your aerospace or industrial application?
Send us your requirements:
Product form (bar / wire / forging/ring)
Size and quantity
Condition (annealed is standard per AMS 4928)
Certification requirements (EN 10204 3.1, source inspection, etc.)
Application and any additional testing requirements
Email: linhui@lhtitanium.com
