309S Stainless steel strip is a versatile austenitic chromium-nickel stainless steel specifically designed for exceptional resistance to oxidation and corrosion at high temperatures. Its low carbon content ("S" designation for "Special Carbon") minimizes carbide precipitation during prolonged exposure to elevated temperatures, making it an ideal choice for applications involving continuous thermal cycling and extreme heat.
Product Name | |
Standard | JIS, AISI, ASTM, GB,DIN, EN, etc. |
Material | 309S |
Surface | black painted, anti rust varnished, PE coated, anti rust oiled, galvaniZed, checkered, color coated |
Width | 10mm-1500mm, according to customer's requirement |
Thickness | 0.03~6.0mm or customer's requirement |
Technical Methods | Hot Rolled/Cold rolled |
Coil ID | 508-610mm or as per your request |
Packaging | According to customer required |
Coil Weight | 3-5 Tons, or as required |
Application | Construction, machinery manufacturing, container manufacturing, shipbuilding, bridges, etc. |
Packing | Standard Seaworthy Packing (Plastic film in the first layer,second layer is Kraft paper. Third layer is galvanized sheet) |
MOQ | 1 Ton, more quantity price will be lower |
Key Features & Advantages
Excellent High-Temperature Resistance: Outstanding oxidation resistance in intermittent service to 1035°C (1900°F) and in continuous service to 1010°C (1850°F).
Low Carbon Content (309S): The reduced carbon level helps prevent sensitization and intergranular corrosion in the heat-affected zone of welds, ensuring structural integrity after fabrication.
Superior Corrosion Resistance: Offers good resistance to a wide range of atmospheric environments and many corrosive media, outperforming standard 304/304L grades.
High Strength at Elevated Temperatures: Maintains remarkable mechanical strength and scaling resistance under thermal stress.
Excellent Formability and Weldability: Can be readily fabricated and welded using all standard methods, facilitating complex designs and assemblies.
Standard Specifications
ASTM: A240 / A480
UNS Designation: S30908
EN/DIN Designation: 1.4833
Typical Chemical Composition (Weight %)
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 22.0 - 24.0 |
| Nickel (Ni) | 12.0 - 15.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 |
| Carbon (C) | ≤ 0.08 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical for Annealed Condition)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 620 MPa (90 ksi) |
| Yield Strength (0.2% Offset) | ≥ 310 MPa (45 ksi) |
| Elongation (in 2") | ≥ 40% |
| Hardness (Rockwell B) | ≤ 95 HRB |
Available Specifications
Thickness: 0.05 mm - 2.0 mm (0.002" - 0.078")
Width: 2.0 mm - 610 mm (0.08" - 24.0")
Temper: Annealed, 1/4 Hard, 1/2 Hard, Full Hard, etc.
Surface Finish: 2B, BA, No. 1, No. 4, Matte, or as required.
Primary Applications
309S stainless steel strip is the material of choice for high-temperature components across various industries:
Furnace Components: Heat treatment trays, baffles, retorts, and radiant tubes.
Thermal Processing: Conveyor belts, furnace liners, and mesh belts for ovens and kilns.
Power Generation: Boiler components, heat exchangers, and burner parts.
Automotive: Exhaust system parts, catalytic converter housings, and heat shields.
Food Processing: Oven liners, chain belts for fryers, and other high-temperature cooking equipment.
Aerospace: Jet engine components and afterburner parts.
General Fabrication: Welding filler wire and overlay for joining dissimilar metals.
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