Overview
SS201 (AISI 201 Stainless Steel) is an austenitic stainless steel belonging to the 200 Series Stainless Steel Family. It was developed as a lower-cost alternative to 304 stainless steel by partially replacing nickel with manganese and nitrogen.
SS201 offers good corrosion resistance, excellent formability, attractive appearance, and high strength. Due to its cost-effectiveness, SS201 is widely used in decorative applications, kitchen equipment, furniture, construction materials, appliances, and general industrial products.
Compared with SS304, SS201 has lower corrosion resistance but higher yield strength and lower material cost.
Material Specification
| Property | Value |
|---|---|
| Material Designation | AISI 201 |
| Material Family | Austenitic Stainless Steel |
| UNS Number | S20100 |
| EN Grade | 1.4372 |
| Density | 7.86 g/cm³ |
| Magnetic Property | Non-Magnetic (Annealed State) |
| Standard Forms | Sheet, Plate, Coil, Tube, Pipe, Bar, Wire |
Chemical Composition
| Element | Content (%) |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 16.0–18.0 |
| Nickel (Ni) | 3.5–5.5 |
| Manganese (Mn) | 5.5–7.5 |
| Nitrogen (N) | ≤0.25 |
| Carbon (C) | ≤0.15 |
| Silicon (Si) | ≤1.00 |
| Phosphorus (P) | ≤0.060 |
| Sulfur (S) | ≤0.030 |
Mechanical Properties
Annealed Condition
| Property | Value |
|---|---|
| Tensile Strength | ≥515 MPa |
| Yield Strength | ≥275 MPa |
| Elongation | ≥35% |
| Hardness | ≤95 HRB |
| Elastic Modulus | 193 GPa |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.86 g/cm³ |
| Melting Point | 1400–1450°C |
| Thermal Conductivity | 16.3 W/m·K |
| Electrical Resistivity | 0.72 μΩ·m |
| Thermal Expansion Coefficient | 16.8 × 10⁻⁶/K |
| Specific Heat Capacity | 500 J/kg·K |
Corrosion Resistance
| Environment | Performance |
|---|---|
| Indoor Environment | Excellent |
| Atmospheric Exposure | Good |
| Humid Environment | Good |
| Industrial Environment | Moderate |
| Marine Environment | Poor |
| Chloride Environment | Poor |
| Food Contact Applications | Good |
SS201 provides adequate corrosion resistance for indoor and light-duty outdoor applications. However, for coastal, marine, or highly corrosive environments, SS304 or SS316 is recommended.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / AISI (USA) | 201 |
| UNS | S20100 |
| EN (Europe) | 1.4372 |
| DIN (Germany) | X12CrMnNiN17-7-5 |
| JIS (Japan) | SUS201 |
| GB/T (China) | 12Cr17Mn6Ni5N |
| ISO | X12CrMnNiN17-7-5 |
Available Forms
| Product Type | Availability |
|---|---|
| Stainless Steel Sheet | Yes |
| Stainless Steel Plate | Yes |
| Stainless Steel Coil | Yes |
| Stainless Steel Pipe | Yes |
| Stainless Steel Tube | Yes |
| Stainless Steel Bar | Yes |
| Stainless Steel Wire | Yes |
| Decorative Profiles | Yes |
Typical Applications
Architectural Industry
- Decorative Panels
- Elevator Decoration
- Interior Cladding
- Handrails
- Balustrades
Furniture Industry
- Stainless Steel Furniture
- Office Furniture
- Decorative Frames
- Display Racks
Kitchen Equipment
- Kitchen Sinks
- Food Containers
- Kitchen Utensils
- Storage Cabinets
Consumer Products
- Household Appliances
- Washing Machine Components
- Decorative Trim
- Home Accessories
Industrial Applications
- Light Structural Components
- Equipment Covers
- Machine Housings
- Fabricated Assemblies
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Laser Cutting | Excellent |
| Waterjet Cutting | Excellent |
| CNC Machining | Good |
| Stamping | Excellent |
| Deep Drawing | Excellent |
| Bending | Excellent |
| Welding | Good |
| TIG Welding | Good |
| MIG Welding | Good |
| Polishing | Excellent |
Advantages
Cost Effective
Lower nickel content makes SS201 significantly cheaper than SS304.
High Strength
Higher yield strength than SS304.
Excellent Formability
Suitable for deep drawing and sheet metal fabrication.
Attractive Appearance
Excellent polished and decorative surface finishes.
Good Weldability
Can be welded using common stainless steel welding methods.
Widely Available
Available globally in many product forms.
Limitations
Lower Corrosion Resistance Than SS304
Not recommended for highly corrosive environments.
Poor Marine Performance
Susceptible to chloride corrosion and pitting.
Lower Outdoor Durability
May develop surface rust in humid coastal regions.
Limited Chemical Resistance
Less resistant to aggressive chemicals than SS316.
Comparison with Other Stainless Steels
| Property | SS201 | SS304 | SS316 | SS430 | SS410 |
|---|---|---|---|---|---|
| Corrosion Resistance | Good | Excellent | Outstanding | Moderate | Moderate |
| Strength | High | Medium | Medium | Medium | High |
| Weldability | Good | Excellent | Excellent | Fair | Fair |
| Formability | Excellent | Excellent | Excellent | Good | Fair |
| Cost | Low | Medium | High | Low | Low |
| Marine Resistance | Poor | Good | Excellent | Poor | Poor |
Comparison with Common Engineering Metals
| Material | Density (g/cm³) | Corrosion Resistance | Strength | Cost |
|---|---|---|---|---|
| SS201 | 7.86 | Good | High | Low |
| SS304 | 8.00 | Excellent | Medium | Medium |
| SS316 | 8.00 | Outstanding | Medium | High |
| Aluminum 6061 | 2.70 | Good | Medium | Medium |
| Carbon Steel 1018 | 7.85 | Poor | Medium | Low |
| Brass C360 | 8.47 | Good | Medium | High |
Available Surface Finishes
Mill Finishes
- No.1 Finish
- 2B Finish
- BA (Bright Annealed)
- Hot Rolled Finish
Decorative Finishes
- Mirror Polish
- Hairline Finish
- Satin Finish
- Vibration Finish
- Sandblasted Finish
- Etched Finish
Color Finishes
- PVD Gold
- Rose Gold
- Champagne Gold
- Black Titanium
- Bronze
- Blue Titanium
Frequently Asked Questions (FAQ)
What is SS201 stainless steel?
SS201 is a low-nickel austenitic stainless steel developed as a cost-effective alternative to SS304.
What is SS201 used for?
Typical applications include:
- Decorative Panels
- Furniture
- Kitchen Equipment
- Household Appliances
- Architectural Components
- Stainless Steel Fabrication
Is SS201 food grade?
Yes. SS201 can be used for many food-contact applications. However, SS304 is generally preferred for commercial food processing and long-term food contact.
What is the difference between SS201 and SS304?
| Property | SS201 | SS304 |
|---|---|---|
| Nickel Content | Lower | Higher |
| Corrosion Resistance | Good | Excellent |
| Cost | Lower | Higher |
| Outdoor Durability | Lower | Better |
Is SS201 magnetic?
In the annealed condition, SS201 is generally non-magnetic. Cold working may induce slight magnetism.
Can SS201 rust?
Yes. Under humid, chloride-rich, or coastal environments, SS201 may develop surface rust more easily than SS304 or SS316.
Is SS201 suitable for outdoor use?
For dry inland environments, yes. For coastal and marine environments, SS304 or SS316 is recommended.
Can SS201 be welded?
Yes. SS201 offers good weldability using TIG, MIG, and resistance welding methods.
Is SS201 cheaper than SS304?
Yes. Due to its lower nickel content, SS201 is typically 15–30% less expensive than SS304.
Does GCNOV provide custom manufacturing services for SS201?
Yes. GCNOV provides:
- Laser Cutting
- CNC Machining
- Sheet Metal Fabrication
- Tube Fabrication
- Welding & Assembly
- Mirror Polishing
- PVD Coating
- Prototype Development
- Low-Volume Production
- Mass Production