AMS 4901 Gr4 Titanium Foil Description
1. Introduction
AMS 4901 Gr4 Titanium Foil is a high-strength titanium foil for aerospace use, made under AMS 4901 standards. It is produced by vacuum melting, precision rolling, and vacuum annealing, giving stable quality and reliable performance. It has the highest strength among commercially pure titanium grades, with good corrosion resistance and no need for heat treatment.
Benefits in Aerospace Use
- Higher mechanical strength improves safety under long-term stress and vibration.
- High strength-to-weight efficiency supports lightweight aerospace design.
- Stable production ensures consistent batch-to-batch quality.
- Strong corrosion resistance performs well in humidity and marine environments.
- Good formability enables efficient processing of thin-wall and structural components.
Comparison with Other Grades (AMS 4901 System)
Gr1 Titanium Foil:
- Highest ductility, lowest strength;
- Best for complex forming and highly deformable parts;
Gr2 Titanium Foil:
- Balanced strength and formability;
- Most widely used general aerospace-grade titanium;
Gr4 Titanium Foil:
- Highest strength and best load-bearing capability;
- Preferred for structural, functional, and reliability-critical aerospace components;
2. Standard Specifications
Thickness range: 0.02–1.0 mm
Width range: 15-680 mm
Delivery form: coil/strip/cut-to-length plate (customizable)
Custom thickness available: ≧0.005 mm;
3. Production Line Process & Equipment Capabilities
Melting → Forging → Hot Rolling Breakdown → Multi‑pass 20‑high Precision Cold Rolling → Ultrasonic Cleaning → Continuous Online Annealing → Skin Pass Treatment → Slitting → Inspection and Packaging.
Key equipment:
- 750mm 20-high precision rolling mill
- Ultrasonic cleaning line
- Continuous Annealing Line
- High-Precision Leveling Line
- Slitting line
- Grinding Line
4. Key Equipment & Process Capabilities
- 20-High Precision Rolling Mill: maximum rolling speed: 400 m/min
- Ultrasonic cleaning line: surface dyne level ≥40, maximum line speed: 30 m/min
- High-Precision Leveling Line: maximum speed: 150 m/min
- Slitting Line: Thickness range: 0.02 mm-1.0 mm, width tolerance ±0.1 mm
- Grinding Line: Improves surface consistency and coating adhesion.
Technical Specifications
Basic Product Information
|
Item |
Detail |
|
Materials brand |
Gr4 |
|
Materials type |
Commercially pure titanium (α-type) |
|
Standard |
AMS 4901 |
|
Product modality |
Titanium foil/itanium strip/titanium coil |
|
Thickness |
≤1.0 mm |
Specification
|
Item |
Parameter scope |
|
Thickness |
0.02-1.0 mm |
|
Width |
15-680 mm |
|
Length |
Customizable |
|
Surface |
Bright/matte |
|
Delivery status |
Annealed (M)/cold-worked (Y) |
Chemical Composition
|
Element |
Ti |
O |
Fe |
C |
N |
H |
|
Percentage |
≥99.0% |
≤0.40% |
≤0.50% |
≤0.08% |
≤0.05% |
≤0.015% |
Mechanical Properties
|
Property |
Value |
|
Density |
4.51 g/cm³ |
|
Tensile strength |
≧550 MPa |
|
Yield strength |
480–665 MPa |
|
Elongation |
≥15% |
Features
- Highest strength among commercially pure titanium (Gr4), ensuring excellent structural reliability.
- Excellent corrosion resistance in aerospace and harsh environments.
- Stable α-phase structure, no heat treatment required for strengthening.
- Good balance of strength and formability compared to Gr1 and Gr2.
- High consistency and stable performance through vacuum melting and precision rolling.
- Suitable for high-reliability aerospace applications with strict quality requirements.
Technological Advantages
- Strict control over surface color difference to ensure uniform appearance and color consistency.
- Precise dimension control to meet tolerance specification requirement.
- Self-developed defatting formula can improve surface cleanliness.
- Optimized leveling tension to ensure excellent material flatness.
- Sanding process to enhance surface uniformity and texture.
- Stable annealing process to guarantee the overall material properties.
- High-precision slitting technology can increase product yield and quality.
Applications
Engine Applications
- Engine thermal insulation foils, sealing gaskets
- Turbine flow guide components
- Hydraulic system seals
Aircraft Structures
- Fuselage and structural components
- Lightweight skin panels
- Electromagnetic shielding structures
- Precision internal components
Space Applications
- Satellite structural parts
- Thermal protection liners
- Propulsion system sealing materials
High-end Electronics & Semiconductors
- Electromagnetic shielding foils
- Chip heat dissipation structures
- Precision conductive thin films
Custom Processing Capabilities
1. Production Line Strength
Annual capacity: 3,000 tons for high-end strip and foil materials.
2. Advanced Equipment Capabilities
750 mm 20-high precision rolling mill
Ultrasonic Cleaning Line
Continuous Annealing Line
High-Precision Leveling Line
Slitting line
Grinding Line
3. Comprehensive Processing Service
A. Materials: titanium, nickel, zirconium and their alloys
Specifications: thickness 0.02–1.0 mm, width 15–680 mm, customize according to requirement
B. Surface treatment: cleaning, sanding, annealing; available in bright, matte and other function surface
C. Dimensional & flatness control: precise control of thickness, tolerances and surface flatness
D. Slitting & cutting to length: suitable for ultra-thin wide strips with high yield and stable quality
E. Mass delivery: annual capacity of 3,000 tons to meet large-volume, high-standard custom orders