0.04mm (40μm)
321 STAINLESS STEEL FOIL


0.04mm 321 precision stainless steel foil offers optimized strength and flexibility for precision stamping, thin‑wall gaskets, and electrical insulation components.

As a titanium‑stabilized austenitic alloy, it resists chromium carbide precipitation and oxidation at elevated temperatures, outperforming standard grades in corrosive and cyclic thermal environments.

High-Temperature Stability
Titanium Stabilized
Precision Thickness 0.04mm
Good Formability
Clean Surface Finish
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PRODUCT OVERVIEW

0.04mm 321 Stainless Steel Foil

0.04mm 321 stainless steel foil is one of the titanium-stabilized austenitic stainless steel designed for applications requiring excellent resistance to intergranular corrosion and oxidation at elevated temperatures.

Its ultra-thin thickness combined with reliable mechanical performance makes it suitable for precision stamping, thermal components, shielding, and heat-resistant industrial parts.

Thickness
0.04mm (± tolerance)
Material Grade
SUS 321 / AISI 321
Surface Finish
2B / BA / Matte / Bright
Supply Form
Slit Coil / Sheet / Strip
Customization
Thickness, Width, Hardness, Surface Finish, Coil Size, Packaging

TECHNICAL SPECIFICATIONS

Product Name321 Stainless Steel FoilTemper OptionsAnnealed, Full Hard
Thickness0.04mm (±0.003mm tolerance)Edge ConditionSlit Edge / Deburred Edge
Material GradeSUS 321 / AISI 321Coil ID 200/300mm
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×CPackagingClean paper + export wooden case
Width Range2-600mmSurface Finish2B / 2D / BA

PRODUCT HIGHLIGHTS

Better Structural Support

Provides enhanced mechanical strength for precision components.

Heat-Resistant Grade

Maintains stability and oxidation resistance at high temperatures.

Good Formability

Excellent ductility for stamping, bending, and shaping.

Clean Surface Quality

Smooth, bright surface ensures better appearance and processing.

Stable Performance

Resists intergranular corrosion and ensures long-term reliability.

Wide Industrial Use

Suitable for multiple industries and demanding applications.

TYPICAL APPLICATIONS

Automotive Heat-Resistant Parts
Aerospace Components
Thermal Insulation & Shielding
Chemical & Industrial Equipment
Precision Stamping & Forming

WHY CHOOSE 0.04MM 321 STAINLESS STEEL FOIL?

  • Titanium stabilization for high-temperature strength and corrosion resistance.
  • Ultra-thin precision for accurate and efficient processing.
  • Excellent formability for complex shapes and designs.
  • Consistent thickness and surface quality for reliable performance.
  • Customizable specifications to meet your exact project requirements.

Manufacturing Process

Raw Material Inspection01

Raw Material
Inspection

Precision Cold Rolling02

Precision
Cold Rolling

Thickness Control03

Thickness
Control

Annealing Treatment04

Annealing
Treatment

Slitting & Edge Control05

Slitting & Edge
Control

Surface Inspection06

Surface
Inspection

Mechanical Testing07

Mechanical
Testing

Protective Packaging08

Protective
Packaging

QUALITY ASSURANCE

ALTER follows a strict quality management system from raw material to final product. Every coil is manufactured and inspected in accordance with international standards to ensure consistent quality, performance, and traceability.

  • Chemical Composition Analysis
  • Mechanical Property Testing
  • Thickness & Dimensional Inspection
  • Surface Finish & Visual Inspection
  • Corrosion Resistance Testing
  • Packaging & Shipment Inspection
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