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Stainless Steel 309 Sheet, Plate & Coil are popular austenitic stainless steel products known for their strength, cost efficiency, and versatility. SS 309 is a chromium-nickel-manganese alloy designed to be a lower-cost alternative to grades like 304. It offers a perfect balance of hardness, corrosion resistance, and formability for both industrial and decorative applications.
SS 309 Sheets and Plates are manufactured from high-quality raw materials that comply with ASTM A240 / ASME SA240 standards. These materials exhibit excellent toughness, good drawability, and high resistance to wear and abrasion. Stainless Steel 309 can be easily fabricated, welded, and polished, making it ideal for products requiring durability and a clean finish.
The chemical composition of Stainless Steel 309 includes about 16–18% chromium, 4–6% nickel, and up to 7.5% manganese. This unique composition enhances its strength and gives it good resistance to oxidation and mild corrosion. Though not as corrosion-resistant as 304 or 316, SS 309 performs well in mildly corrosive environments and indoor applications.
Stainless Steel 309 Coils are available in both hot-rolled and cold-rolled forms, with a wide range of thicknesses and finishes such as 2B, BA, and No.4. These coils are often used to produce kitchen utensils, decorative panels, railway coaches, sinks, and appliances. Their bright, attractive surface finish also makes them suitable for architectural and interior design applications.
SS 309 Sheets and Plates offer an excellent combination of strength and toughness even at low temperatures. They are known for their good work-hardening ability, allowing manufacturers to form or bend them easily without cracking. The alloy’s mechanical properties make it a reliable choice for light structural components and machinery parts.
Stainless Steel 309 Sheet, Plate & Coil are widely used in industries such as construction, food processing, automotive, and furniture manufacturing. Their aesthetic appearance and cost-effectiveness make them a preferred material for kitchenware, countertops, appliances, and other decorative purposes where corrosion exposure is minimal.
Welding and fabrication of SS 309 can be done using standard methods such as TIG, MIG, or resistance welding. It does not require preheating before welding, though post-weld annealing may be applied to restore optimal corrosion resistance. The material can also be cut, drilled, and polished to achieve specific dimensions and finishes as per client requirements.
At reputable suppliers, Stainless Steel 309 Sheets, Plates & Coils are supplied with Mill Test Certificates (MTC) confirming compliance with EN 10204 3.1 standards. Each product undergoes stringent quality checks for mechanical strength, dimensional accuracy, and surface finish. Protective coatings and packaging ensure safe transportation and long-lasting quality.
Specification Table
| Property | Specification |
|---|---|
| Grade | SS 309 / UNS S30900 |
| Form | Sheet, Plate, Coil |
| Standard | ASTM A240 / ASTM A480 / ASME SA240 |
| Thickness | 0.5 mm – 100 mm (depending on form) |
| Width | 1000 mm – 2000 mm |
| Length | 2000 mm – 6000 mm (sheets/plates) or coil length as per requirement |
| Surface Finish | 2B, BA, No.1, No.4 |
| Density | 7.99 g/cm³ |
| Melting Point | 1400 – 1450°C |
| Applications | Furnace parts, heat exchangers, kiln linings, chemical processing equipment |
Chemical Composition (Typical ranges for SS309)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 max |
| Chromium (Cr) | 22.0 – 24.0 |
| Nickel (Ni) | 12.0 – 15.0 |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.5 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.03 max |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | Value |
|---|---|
| Tensile Strength | 515 – 750 MPa |
| Yield Strength | 205 MPa min |
| Elongation (in 50 mm) | 40% min |
| Hardness (Brinell) | 187 – 217 HB |
| Modulus of Elasticity | 193 GPa |
| Poisson's Ratio | 0.29 |
| Impact Strength | 65 J at room temperature |
| Maximum Service Temperature | 1093°C (in continuous service) |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | S30900 |
| EN (Europe) | 1.4833 |
| JIS (Japan) | SUH309 |
| DIN (Germany) | X12CrNiSi25-20 |
| GB / China | 0Cr23Ni13 |
| UNS | S30900 |
| ISO | Cr23Ni13 |
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.
| Thickness (mm) | Width (mm) | Length (mm) | Weight per Sheet (kg) |
|---|---|---|---|
| 1.0 | 1000 | 2000 | 15.98 |
| 2.0 | 1000 | 2000 | 31.96 |
| 3.0 | 1250 | 2500 | 74.94 |
| 4.0 | 1500 | 3000 | 143.82 |
| 5.0 | 1500 | 3000 | 179.78 |
| 6.0 | 1500 | 3000 | 215.74 |
| 8.0 | 2000 | 6000 | 767.04 |
| 10.0 | 2000 | 6000 | 959.20 |
Common Types Of Sheet Plates
Shim Sheet Plate
Perforated Sheet Plate
Chequered Plate
Coil
Strips
Foil
Hot Rolled Sheet Plates
Cold Rolled Plate
Matt PVC Sheet Plate
Frequently Asked Questions (FAQ)
What is Stainless Steel 309 used for?
SS 309 is primarily used in high-temperature applications such as furnace parts, heat exchangers, kiln linings, and chemical processing equipment due to its excellent heat and corrosion resistance.
What forms of SS 309 are available?
Stainless Steel 309 is available in sheet, plate, and coil forms, with various thicknesses, widths, and lengths suitable for industrial applications.
What is the chemical composition of SS 309?
SS 309 contains 22-24% Chromium, 12-15% Nickel, 0.20% max Carbon, and minor amounts of Manganese, Silicon, Phosphorus, and Sulfur, with Iron as the balance.
What are the mechanical properties of SS 309?
SS 309 has tensile strength of 515–750 MPa, yield strength of 205 MPa min, elongation of 40% min, and excellent high-temperature resistance up to 1093°C in continuous service.
Can SS 309 be welded?
Yes, SS 309 can be welded using conventional methods such as TIG and MIG welding. Proper care should be taken to avoid sensitization and maintain corrosion resistance.
Sheet Plates & Coils Supplier
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