Comprehensive Guide to Gr5 Titanium Foil

1. Introduction

Gr5 titanium foil (Ti-6Al-4V), as the most widely applied titanium alloy foil, plays a critical role across aerospace, medical devices, chemical equipment, and electronic industries. This article provides engineers and procurement professionals with a comprehensive technical guide covering material characteristics, technical standards, specification parameters, processing technology, quality control, and procurement recommendations.

2. Basic Information on Gr5 Titanium Foil

Gr5 titanium foil corresponds to the Ti-6Al-4V alloy in international standards and is a titanium alloy grade specified under the ASTM B265 standard for sheet and foil products. In Chinese standards, Gr5 corresponds to the TC4 alloy. The aluminum content of Gr5 titanium foil ranges from 5.5% to 6.7%, vanadium content from 3.5% to 4.5%, with the balance being titanium. This alpha+beta dual-phase alloy achieves maximum strength through the alpha-stabilizing effect of aluminum and the beta-stabilizing effect of vanadium.

3. Material Properties

(1) Mechanical Properties

The typical mechanical properties of annealed Gr5 titanium foil are as follows:

Tensile Strength: ≥895 MPa

Yield Strength: ≥825 MPa

Elongation: ≥10%

Hardness: HB 330-392

(2) Corrosion Resistance

Gr5 titanium foil exhibits excellent corrosion resistance in seawater, chloride solutions, nitric acid, and organic acids. The corrosion rate in seawater is less than 0.001 mm/year.

(3) High-Temperature Performance

Gr5 titanium foil maintains good mechanical properties within the 300-400°C range. At 400°C, tensile strength can be retained at 85-90% of its room-temperature value.

(4) Low-Temperature Performance

Gr5 titanium foil retains excellent toughness at -196°C (liquid nitrogen temperature).

4. Technical Standards

The primary technical standards governing Gr5 titanium foil include:

• ASTM B265: Standard Specification for Titanium and Titanium Alloy Sheet and Plate
• AMS 4928: Specification for Grade 5 Titanium Alloy Sheet and Plate – Aerospace Material Specification
• EN 922: European Standard for Titanium and Titanium Alloy Sheet and Plate
• GB/T 3622: Chinese Standard for Titanium and Titanium Alloy Sheet and Plate

5. Specification Parameters

• Thickness Range: 0.05-3.0 mm (standard); custom sizes available down to 0.025 mm
• Width Range: ≤1500 mm (standard); custom sizes available up to 2000 mm
• Length Range: ≤3000 mm (standard); custom sizes available up to 6000 mm
• Surface Quality: Ra ≤1.6 μm (finished surface) or Ra ≤3.2 μm (hot-rolled surface)
• Delivery Condition: Annealed (M temper), Solution Treated (S temper), or Aged (T temper)

6. Processing Technology

• Cold Forming: Gr5 titanium foil can undergo cold forming processes including bending, stamping, and flanging.
• Welding: Compatible with TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and laser welding methods.
• Heat Treatment: Annealing temperature: 750-850°C; Aging temperature: 500-650°C.
• Surface Treatment: Available options include sandblasting, pickling, anodizing, and polishing.

7. Typical Applications

• Aerospace: Aircraft engine compressor blades, airframe structural components
• Medical Devices: Artificial joints, orthopedic implants, surgical instruments
• Chemical Equipment: High-pressure reaction vessels, heat exchangers
• Marine Engineering: Pressure-resistant hulls for deep-sea submersibles
• Sports Equipment: Golf club heads, bicycle frames

8. Comparative Performance Data

Table 1: Mechanical and Corrosion Comparison

Table 2: Application Areas and Substitutions

Table 3: Heat Treatment States and Properties

Table 4: Thickness Specifications and Tolerances

9. Procurement Recommendations

• Specify Technical Standards: Select the appropriate international standard based on application requirements.
• Confirm Specification Parameters: Verify thickness, width, length, surface quality, and delivery condition.
• Request Test Reports: Require EN 10204 Type 3.1 certification for material traceability.
• Select Qualified Suppliers: Choose ISO 9001-certified suppliers with relevant industry experience.
• Consider Total Cost: Evaluate not only unit price but also processing costs and service life.

10. Conclusion

Gr5 titanium foil demonstrates irreplaceable value across numerous industrial sectors thanks to its high strength, excellent corrosion resistance, and favorable processing characteristics. Engineers and procurement personnel should comprehensively evaluate material performance, operating environment, and cost factors when selecting materials to achieve optimal outcomes.

11. Frequently Asked Questions

Q1: What is the difference between Gr5 and Gr2 titanium foil?

Gr5 has a tensile strength (≥895 MPa) more than 2.5 times that of Gr2 (≥340 MPa), but Gr2 offers higher elongation and superior formability.

Q2: Can Gr5 titanium foil be welded?

Yes. Gr5 titanium foil can be welded using TIG and MIG processes, but it requires argon gas shielding protection.

Q3: Why is Gr5 titanium foil more expensive than Gr2?

Gr5 contains alloying elements such as aluminum and vanadium, resulting in higher raw material costs and more complex processing requirements.

12. Recommended Supplier

Baoti Titanium Valley Titanium Nickel Zirconium Material Processing Co., Ltd. is a professional manufacturer of high-end rare metal processing products. Equipped with an Italian Danieli rolling production line, the company produces over 2,000 metric tons of titanium foil annually and offers full-size customization with EN 10204 Type 3.1 certified documentation. Contact them for technical support and quotation: sales@titaniumvalleys.com

13. References

1. ASTM International. ASTM B265-21 Standard Specification for Titanium and Titanium Alloy Sheet and Plate. West Conshohocken: ASTM International, 2021.
2. GB/T 3622.1-2017 Titanium and Titanium Alloy Sheets and Plates – Part 1: Dimensions, Shape and Allowable Deviations. Beijing: Standards Press of China, 2017.

For a broader view of available grades, supply forms, and related specifications, explore our Titanium Foil category.

For product-level details and supply options, you can also review our ASTM F136 Gr5 Eli (Gr23) Titanium Foil page.