Overview
SS202 (AISI 202 Stainless Steel) is an austenitic stainless steel belonging to the 200 Series Stainless Steel Family. Similar to SS201, SS202 was developed as a cost-effective alternative to SS304 by reducing nickel content and increasing manganese and nitrogen levels.
SS202 offers good corrosion resistance, high strength, excellent toughness, and good formability. Compared with SS201, SS202 generally provides slightly better corrosion resistance and mechanical properties, making it suitable for architectural, industrial, transportation, and household applications.
SS202 is widely used in stainless steel furniture, kitchen equipment, rail transportation, decorative structures, storage tanks, and fabricated metal products.
Material Specification
| Property | Value |
|---|---|
| Material Designation | AISI 202 |
| Material Family | Austenitic Stainless Steel |
| UNS Number | S20200 |
| EN Grade | 1.4373 |
| Density | 7.80–7.85 g/cm³ |
| Magnetic Property | Non-Magnetic (Annealed State) |
| Standard Forms | Sheet, Plate, Coil, Pipe, Tube, Bar, Wire |
Chemical Composition
| Element | Content (%) |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 17.0–19.0 |
| Nickel (Ni) | 4.0–6.0 |
| Manganese (Mn) | 7.5–10.0 |
| 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 | ≥520 MPa |
| Yield Strength | ≥275 MPa |
| Elongation | ≥35% |
| Hardness | ≤100 HRB |
| Elastic Modulus | 193 GPa |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.80–7.85 g/cm³ |
| Melting Point | 1400–1450°C |
| Thermal Conductivity | 15.5 W/m·K |
| Electrical Resistivity | 0.72 μΩ·m |
| Thermal Expansion Coefficient | 16.5 × 10⁻⁶/K |
| Specific Heat Capacity | 500 J/kg·K |
Corrosion Resistance
| Environment | Performance |
|---|---|
| Indoor Environment | Excellent |
| Atmospheric Exposure | Good |
| Industrial Environment | Good |
| Humid Environment | Good |
| Marine Environment | Poor |
| Chloride Environment | Poor |
| Food Contact Applications | Good |
SS202 provides good corrosion resistance for indoor and general outdoor applications. However, it is not recommended for aggressive chemical environments, coastal installations, or marine exposure.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / AISI (USA) | 202 |
| UNS | S20200 |
| EN (Europe) | 1.4373 |
| DIN (Germany) | X12CrMnNiN18-9-5 |
| JIS (Japan) | SUS202 |
| GB/T (China) | 12Cr18Mn9Ni5N |
| ISO | X12CrMnNiN18-9-5 |
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 Interiors
- Handrails
- Building Facades
- Interior Decoration
Transportation Industry
- Railway Components
- Train Interior Panels
- Bus Interior Structures
- Vehicle Decorative Trim
Furniture Industry
- Stainless Steel Furniture
- Office Furniture
- Storage Racks
- Display Structures
Kitchen Equipment
- Kitchen Cabinets
- Food Storage Containers
- Catering Equipment
- Kitchen Accessories
Industrial Manufacturing
- Fabricated Components
- Storage Tanks
- Equipment Covers
- Structural Supports
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 reduces raw material cost compared to SS304.
High Strength
Offers higher yield strength than many conventional austenitic stainless steels.
Excellent Formability
Suitable for deep drawing and complex fabrication.
Good Toughness
Maintains good mechanical properties across a wide temperature range.
Attractive Appearance
Excellent polishability and decorative surface quality.
Good Fabrication Performance
Easy to cut, bend, form, and weld.
Limitations
Lower Corrosion Resistance Than SS304
Less resistant to corrosion in harsh environments.
Poor Marine Resistance
Not suitable for seawater exposure.
Surface Rust Risk
Can develop tea staining or surface rust in coastal climates.
Lower Chemical Resistance
Not recommended for aggressive chemical processing applications.
Comparison with Other Stainless Steels
| Property | SS202 | SS201 | SS304 | SS316 | SS430 |
|---|---|---|---|---|---|
| Corrosion Resistance | Good | Good | Excellent | Outstanding | Moderate |
| Strength | High | High | Medium | Medium | Medium |
| Formability | Excellent | Excellent | Excellent | Excellent | Good |
| Weldability | Good | Good | Excellent | Excellent | Fair |
| Cost | Low | Low | Medium | High | Low |
| Marine Resistance | Poor | Poor | Good | Excellent | Poor |
Comparison with Common Engineering Metals
| Material | Density (g/cm³) | Corrosion Resistance | Strength | Cost |
|---|---|---|---|---|
| SS202 | 7.85 | 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
- Black Titanium
- Bronze
- Champagne Gold
- Blue Titanium
Frequently Asked Questions (FAQ)
What is SS202 stainless steel?
SS202 is an austenitic chromium-manganese-nickel stainless steel developed as a cost-effective alternative to SS304.
What is SS202 used for?
Typical applications include:
- Architectural Decoration
- Railway Components
- Furniture Manufacturing
- Kitchen Equipment
- Interior Structures
- Stainless Steel Fabrication
Is SS202 food grade?
Yes. SS202 can be used in many food-contact applications, although SS304 remains the preferred choice for commercial food processing.
What is the difference between SS202 and SS304?
| Property | SS202 | SS304 |
|---|---|---|
| Nickel Content | Lower | Higher |
| Corrosion Resistance | Good | Excellent |
| Cost | Lower | Higher |
| Outdoor Durability | Moderate | Better |
Is SS202 magnetic?
In the annealed condition, SS202 is generally non-magnetic. Cold working may introduce slight magnetic properties.
Can SS202 rust?
Yes. Under chloride-rich, humid, or coastal environments, SS202 can develop surface rust more easily than SS304 or SS316.
Is SS202 suitable for outdoor use?
Yes, in normal atmospheric environments. For coastal regions or marine environments, SS304 or SS316 is recommended.
Can SS202 be welded?
Yes. SS202 offers good weldability using TIG, MIG, and resistance welding methods.
Is SS202 stronger than SS304?
Yes. SS202 generally offers higher yield strength, although SS304 provides superior corrosion resistance.
Does GCNOV provide custom manufacturing services for SS202?
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