- Materials
- Forms
- Reference Materials
-
Services
-
Services
-
-
Sectors
-
Supporting cutting edge research and development with advanced materials to your needs.
High performance materials for extreme conditions.
Innovative and lightweight materials with high mechanical properties and durability.
Materials used in chemical engineering from consumables to innovative solutions.
Advanced materials characterized by high electrical or insulation performance.
High quality materials for renewable energy.
Biocompatible and biodegradable materials to the highest standards.
High purity, biocompatible materials for high performance devices and applications.
High purity metals and alloys in various forms and crucibles suitable to your needs.
State of the art materials for the next generation of technologies.
High performance materials for extreme conditions.
Durable materials for corrosive environments.
Foils, disks or windows across a range of materials to facilitate your innovation.
Polymers, metal foils, and sustainable materials for your packaging needs.
Your requirements for unique products and attributes will be met across our 170,000+ product range and customization capabilities.
High-quality materials across branded products in various forms including rods, wires, and foils support space technology needs.
Highest quality materials to support your need for small-quantity specialist materials such as graphite and lithium compounds.
High purity materials to improve the reproducibility and reliability of your evaporation processes.
-
- Product Ranges
-
Resources
-
Find out our latest news.
Read our latest insights, and opinions.
Discover our Innovation Discovered podcasts on innovation, products, interesting topics, and more.
Find out how we've worked with our partners
Our latest updates on what we are doing, find out more.
Find out more about us and the great roles we have available for talented individuals. Find out more.
Take a look at our global distributors.
Explore our FAQ resource to help answer your key questions.
Gain a clearer picture of the language used in scientific study
-
- About Us
AISI 321 Stainless Steel Coil
Available Configurations
Properties common to all products in this list
Key Features
AISI 321 Stainless Steel Coil (UNS S32100) is a titanium-stabilized austenitic stainless steel in continuous coiled strip form, engineered for excellent resistance to sensitization, intergranular corrosion, and thermal fatigue in service at temperatures where standard 304 or 316 would be vulnerable:
Titanium Stabilization Prevents Chromium Carbide Precipitation
The titanium addition — at a minimum of five times the carbon content — preferentially combines with carbon to form stable titanium carbides, preventing chromium carbide precipitation at grain boundaries during welding or sustained high-temperature service.
Continuous Service Capability to ~870 °C
With a continuous service temperature capability of approximately 870 °C, AISI 321 Coil is widely used in aerospace propulsion thermal shields and petrochemical heat exchanger panels where standard 304 or 316 would be vulnerable.
Excellent Resistance to Sensitization & Intergranular Corrosion
Excellent resistance to sensitization and intergranular corrosion makes AISI 321 the preferred grade for thermally cycled assemblies and high-temperature ducting applications.
Thermal Fatigue Resistance
Resistance to thermal fatigue supports reliable long-term performance in components subjected to repeated thermal cycling, such as aerospace propulsion thermal shields.
Coil Format for Large-Area Thermal Management Components
In coil form, AISI 321 supports continuous fabrication of large-area thermal management components, providing the production efficiency needed for high-temperature ducting and cladding applications.
Industrial Applications
AISI 321 Stainless Steel Coil is used across aerospace, petrochemical, and industrial thermal management sectors where standard 304 or 316 would be vulnerable to sensitization at elevated temperatures:
- ✦ Aerospace Propulsion Thermal Shields
- Used in aerospace propulsion thermal shields, where excellent resistance to sensitization, intergranular corrosion, and thermal fatigue ensures reliable performance under the demanding thermal cycling of propulsion systems.
- ✦ Petrochemical Heat Exchanger Panels
- Formed into petrochemical heat exchanger panels, where a continuous service temperature capability of approximately 870 °C supports reliable heat transfer performance in high-temperature process environments.
- ✦ Corrosion-Resistant Cladding for High-Temperature Ducting
- Applied as corrosion-resistant cladding for high-temperature ducting, where titanium stabilization prevents chromium carbide precipitation during welding or sustained high-temperature service.
- ✦ Large-Area Thermal Management Component Fabrication
- Used in continuous fabrication of large-area thermal management components, where the coil format's production efficiency supports cost-effective manufacture of titanium-stabilized stainless components.
- ✦ High-Temperature Creep & Recrystallization Research
- Valuable for high-temperature creep studies, dynamic recrystallization investigations, and microstructural stability testing under cyclic thermal loading.
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 ) | 560 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 70-73 |
| Temperature coefficient( K⁻¹ ) | - |
| Element | Value |
|---|---|
| Maximum use temperature in air( C ) | 800 |
| Melting point( C ) | 1400-1425 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 16.3@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 18@20-100°C |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.9 |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Coil Width | <100mm | ±1mm |
| Coil Width | >=100mm | +2% / -1% |
| Length | +10% / -0% |