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AISI 302 Stainless Steel Foil/Sheet
Available Configurations
Properties common to all products in this list
Key Features
AISI 302 Stainless Steel Foil (UNS S30200) is an austenitic stainless steel in precision thin-sheet form with 17-19% chromium and 8-10% nickel, combining high corrosion resistance with good tensile strength and reliable ductility:
Higher Carbon Content for Improved Cold-Worked Strength
AISI 302's carbon content of up to 0.15 wt% — higher than AISI 304 — allows greater strength after cold working without a significant penalty in toughness, valuable for structural and functional thin-section components.
High Corrosion Resistance
High corrosion resistance suits AISI 302 Foil to flexible shielding layers and catalyst carrier substrates exposed to varied chemical and environmental conditions in emission control and processing applications.
Good Tensile Strength & Reliable Ductility
Good tensile strength combined with reliable ductility supports high-strength diaphragms and precision spring laminates where both formability and finished-component strength are required.
Suited to Constrained Geometries
AISI 302 Foil is valuable for structural and functional thin-section components in constrained geometries, where the combination of strength and thin-gauge dimensional control enables compact, lightweight design.
Marginal Cold-Worked Strength Advantage Over 304
The marginal cold-worked strength advantage of AISI 302 over AISI 304 is relevant wherever finished thin-section component strength benefits from the alloy's slightly elevated carbon content.
Industrial Applications
AISI 302 Stainless Steel Foil is used across structural, functional, and emission control applications where thin-section strength and corrosion resistance must be combined in constrained geometries:
- ✦ Flexible Shielding Layers
- Used as flexible shielding layers where high corrosion resistance and good tensile strength support durable shielding performance in thin, formable sheet form.
- ✦ High-Strength Diaphragms
- Formed into high-strength diaphragms where the marginal cold-worked strength advantage of AISI 302 over AISI 304 delivers improved mechanical performance in thin-section diaphragm applications.
- ✦ Precision Spring Laminates
- Used in precision spring laminates, where reliable ductility combined with good tensile strength supports complex laminated spring geometries with consistent mechanical performance.
- ✦ Catalyst Carrier Substrates in Emission Control Systems
- Applied as catalyst carrier substrates in emission control systems, where high corrosion resistance ensures durability under the chemical and thermal conditions encountered in exhaust treatment applications.
- ✦ High-Performance Flexible Substrate & Fatigue-Resistant Microstructure Research
- Supports development of high-performance flexible substrates, fatigue-resistant microstructures, and multi-layer composites where the marginal cold-worked strength advantage over 304 is relevant to the experimental program.
Material Properties
| Element | Value |
|---|---|
| Hardness - Brinell | 160-190 |
| Elongation at break( % ) | 60 |
| Modulus of elasticity( GPa ) | 190-210 |
| Izod impact strength( J m⁻¹ ) | 20-136 |
| Tensile strength( MPa ) | 510-1100 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 70-72 |
| Element | Value |
|---|---|
| Melting point( C ) | 1400-1420 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 16.3@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 15-18@20-100°C |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.92 |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |