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Stainless Steel 202 fasteners are high-quality, corrosion-resistant components widely used in industrial, commercial, and household applications. They are an economical alternative to the more expensive 304 grade while still offering excellent strength and durability in light-to-medium duty environments.
SS202 is an austenitic stainless steel containing chromium, nickel, and manganese. The combination of these elements provides a balance of mechanical strength, corrosion resistance, and formability. Its lower nickel content makes it cost-effective without compromising essential performance.
These fasteners are available in various forms including machine screws, hex bolts, nuts, washers, self-tapping screws, and threaded rods. Both metric and imperial sizes are available, making them versatile for multiple applications.
While SS202 does not offer the same corrosion resistance as 304 or 316, it is well-suited for indoor environments and lightly corrosive conditions. It resists rusting in typical household, appliance, and furniture applications.
SS202 fasteners have good tensile and yield strengths, making them suitable for assembly and fastening tasks that do not involve extreme loads. They also maintain adequate toughness for machining, bending, and forming operations.
These fasteners come in several finishes including plain bright, passivated, and electroplated. Custom finishes can also be applied for specific aesthetic or functional requirements, such as enhanced corrosion protection or polished surfaces.
Stainless Steel 202 fasteners are commonly used in furniture manufacturing, household appliances, electrical enclosures, indoor construction, joinery, and light structural fittings. Their cost-effectiveness makes them popular in large-scale production projects.
The key advantages of SS202 fasteners include affordability, moderate corrosion resistance, ease of machining, and availability in a wide range of sizes and forms. They provide reliable performance in non-critical environments.
Specification Table
| Property | Specification / Range |
|---|---|
| Material | Stainless Steel 202 (Austenitic) |
| Grade | SS202 |
| Forms | Machine Screws, Hex Bolts, Nuts, Washers, Threaded Rods, Self-tapping Screws |
| Diameter / Size Range | Metric: M1.6 – M64 | Imperial: #2 – 2” |
| Length Range | 6mm – 300mm (Metric) | 1/4" – 12" (Imperial) |
| Tensile Strength | 520 – 750 MPa (typical) |
| Yield Strength | 205 – 310 MPa (typical) |
| Hardness | HRB 90 – 100 |
| Finish / Surface Treatment | Plain (Bright), Passivated, Electroplated (Optional) |
| Standards | ASTM A193 / A194, JIS B1180, ISO 898-1 |
| Applications | Furniture, Household Appliances, Electrical Enclosures, Light Structural Fittings |
Chemical Composition (Typical ranges for SS202)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 3.5 – 5.5 |
| Manganese (Mn) | 5.5 – 7.5 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.06 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | Value / Range |
|---|---|
| Tensile Strength (MPa) | 520 – 750 |
| Yield Strength (MPa) | 205 – 310 |
| Elongation (%) | 30 – 45 |
| Hardness (HRB) | 90 – 100 |
| Density (g/cm³) | 7.8 |
| Modulus of Elasticity (GPa) | 193 – 200 |
| Poisson’s Ratio | 0.27 – 0.30 |
| Impact Strength (J) | ≥ 50 (at room temperature) |
| Melting Point (°C) | 1400 – 1450 |
| Service Temperature (°C) | Up to 800 (continuous service) |
Equivalent Grades
| Standard | Equivalent Grade | Notes |
|---|---|---|
| ASTM / ASME | AISI 202 | Commonly used in US for general fasteners |
| JIS (Japan) | SUS 202 | Japanese Industrial Standard equivalent |
| EN / DIN (Europe) | 1.4378 | European / German standard equivalent |
| ISO | 202 S20 | International Organization for Standardization |
| GB (China) | 202Cr18Mn6N | Chinese national standard equivalent |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Fastener Type | Diameter (mm) | Length (mm) | Thread Pitch (mm) | Approx. Weight per 100 pcs (kg) |
|---|---|---|---|---|
| Machine Screw | M3 | 6 – 30 | 0.5 | 0.12 |
| Machine Screw | M4 | 8 – 40 | 0.7 | 0.25 |
| Hex Bolt | M6 | 12 – 50 | 1.0 | 0.85 |
| Hex Bolt | M8 | 16 – 80 | 1.25 | 2.1 |
| Hex Bolt | M10 | 20 – 100 | 1.5 | 3.9 |
| Hex Bolt | M12 | 25 – 120 | 1.75 | 6.5 |
| Hex Bolt | M16 | 30 – 150 | 2.0 | 14.5 |
| Hex Bolt | M20 | 40 – 200 | 2.5 | 28.0 |
Common Types Of Fasteners
Bolts
Nuts
Steel Screw
Washer
Stud Bolts
Frequently Asked Questions (FAQ)
What is Stainless Steel 202 Fastener?
Stainless Steel 202 fasteners are austenitic stainless steel components, including screws, bolts, nuts, and washers. They offer moderate corrosion resistance and good strength at a lower cost compared to SS304.
Where are SS202 fasteners commonly used?
They are widely used in furniture, household appliances, light structural fittings, electrical enclosures, and general-purpose fastening applications in indoor or lightly corrosive environments.
What forms of fasteners are available in SS202?
SS202 fasteners are available as machine screws, hex bolts, nuts, washers, self-tapping screws, and threaded rods in both metric and imperial sizes.
How does SS202 compare to SS304?
SS202 has lower nickel content than SS304, making it more cost-effective but with slightly lower corrosion resistance. It is suitable for indoor or lightly corrosive conditions.
What are the mechanical properties of SS202 fasteners?
Typical tensile strength ranges from 520–750 MPa, yield strength 205–310 MPa, and elongation 30–45%. Hardness is HRB 90–100.
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