0.03mm (30μm)
321 STAINLESS STEEL FOIL
0.03mm 321 precision stainless steel foil is a titanium‑stabilized ultra‑thin precision strip engineered for micro‑components, flexible circuits, and high‑temperature shielding.
With tight thickness tolerance, smooth 2B finish, and excellent intergranular corrosion resistance, it delivers consistent performance in thermal cycling, welding, and miniaturized electronic assemblies.
Ideal for semiconductor fixtures, sensor housings, and lightweight aerospace parts, this ultra‑thin 321 stainless steel foil balances formability, heat resistance, and long‑term durability for high‑precision manufacturing.
PRODUCT OVERVIEW
0.03mm 321 Stainless Steel Foil
0.03mm 321 stainless steel foil is one of the most widely used thicknesses in precision and heat-resistant applications. It provides good strength, stable formability, and reliable performance in both manufacturing and service conditions.
With titanium stabilization, 321 stainless steel foil offers improved resistance to intergranular corrosion after exposure to high temperatures, making it suitable for automotive, aerospace, industrial, and thermal-related components.
Thickness
0.03mm
Material Grade
SUS 321 / AISI 321
Surface Finish
2B / BA
Supply Form
Slit Coil / Sheet / Strip
Customization
Thickness, Width, Hardness, Surface Finish, Packaging
TECHNICAL SPECIFICATIONS
| Product Name | 321 Stainless Steel Foil |
| Thickness | 0.03mm (±0.003mm tolerance) |
| Material Grade | SUS 321 / AISI 321 |
| Material Type | Titanium-Stabilized Austenitic Stainless Steel |
| Width Range | 2-300mm |
| Surface Finish | 2B / 2D / BA |
| Hardness | Soft, Full Hard |
| Edge Condition | Slit Edge / Deburred Edge |
| Packaging | Clean paper + export wooden case |
| Chemistry % | C≤0.08 Si≤1.00 Mn≤2.00 P≤0.045 S ≤0.030 Cr17.00–19.00 Ni 9.00–13.00 Ti≥5×C |
PPODUCT HIGHLIGHTS
Balanced Flexibility & Strength
0.03mm provides a good balance between flexibility and structural support for versatile applications.
Heat-Resistant Grade
Titanium stabilization improves resistance to intergranular corrosion after exposure to high temperatures.
Good Formability
Suitable for stamping, bending, deep drawing, and other precision forming processes.
Clean Surface Quality
Smooth, uniform surface finish supports high-quality downstream processing.
Stable Performance
Provides consistent dimensional stability and material performance in thermal environments.
Wide Industrial Use
Ideal for aerospace, automotive, industrial, thermal shielding, and more.
TYPICAL APPLICATIONS
Automotive Heat-Resistant Parts
Exhaust components, heat shields, gaskets, and precision stamped parts.
Aerospace Components
Thermal shielding parts, lightweight structures, and precision aerospace hardware.
Thermal Insulation & Shielding
Heat insulation layers, thermal protective foil, and high-temperature shield structures.
Chemical & Industrial Equipment
Diaphragms, gaskets, seals, and corrosion-resistant industrial components.
Precision Stamping & Forming
Shims, springs, thin structural parts, and customized precision metal components.
WHY CHOOSE 0.03mm 321 STAINLESS STEEL FOIL?
- Excellent balance of flexibility and strength
- Reliable performance under elevated temperatures
- Good corrosion resistance and oxidation stability
- Easy to process for precision manufacturing
- Stable thickness and consistent quality
- Suitable for a wide range of industrial applications
OUR MANUFACTURING CAPABILITIES
01
Raw Material
Inspection
02
Precision
Cold Rolling
03
Thickness
Control
04
Annealing
Treatment
05
Slitting & Edge
Control
06
Surface
Inspection
07
Mechanical
Testing
08
Protective
Packaging
QUALITY ASSURANCE
ALTER implements strict quality control throughout the entire production process. Every coil of 0.03mm 321 stainless steel foil is inspected to ensure it meets customer requirements for thickness, surface finish, flatness, mechanical properties, and overall quality.
- Material Grade Verification
- Thickness Measurement
- Surface Finish Inspection
- Flatness Inspection
- Mechanical Property Testing
- Edge Condition Control
- Final Packaging Inspection
