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  • 310S Stainless Steel Coil

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310S Stainless Steel Coil
The 310S stainless steel coil is an extremely high-chromium-nickel austenitic heat-resistant stainless steel coil. Its core characteristic is that it can maintain excellent oxidation resistance, anti-carburization ability and structural strength even at extremely high temperatures (up to 1150℃), making it the flagship material for industrial high-temperature furnace applications.
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Product Introduction

310S Stainless Steel Coil is a highly alloyed austenitic stainless steel specifically engineered for exceptional high-temperature oxidation resistance and elevated temperature strength. With a balanced high chromium (24-26%) and nickel (19-22%) composition, 310S delivers superior performance in continuous service up to 1150°C, making it the premier choice for high-temperature furnace components, heat treatment equipment, and thermal processing applications. The "S" designation indicates lower carbon content (≤0.08%) compared to standard 310 grade, providing improved resistance to sensitization and intergranular corrosion in welded structures exposed to high temperatures.

Supplied in continuous coil form for manufacturing efficiency, 310S combines outstanding oxidation resistance, creep strength, and sulfidation resistance at elevated temperatures. Its high alloy content ensures the formation of a stable, protective chromium oxide scale that resists spalling during thermal cycling, while its austenitic structure maintains good ductility and toughness across a wide temperature range. Particularly valuable in heat-intensive industries, 310S offers reliable performance where other stainless steels would rapidly degrade, providing an optimal balance of high-temperature capability and fabricability.

Product parameters


Item / ParameterSpecification for 310S Coil (UNS S31008)Notes / Significance
Key FeatureThe Premium High-Temperature Austenitic Grade. Exceptionally high chromium and nickel content provides outstanding oxidation resistance and strength at temperatures up to 1150°C.The standard material for high-temperature furnace components and heat-resistant applications.
Common DesignationsUNS S31008, AISI 310S, EN 1.4845, X8CrNi25-21, JIS SUS310S"S" indicates low carbon version; standard 310 has higher carbon (≤0.25%).
Chemical Composition (Typical wt.%)C: ≤ 0.08
Cr: 24.0 - 26.0Ni: 19.0 - 22.0Mn: ≤ 2.00
Si: ≤ 1.50
P: ≤ 0.045
S: ≤ 0.030		High Cr provides oxidation resistance; high Ni ensures austenite stability at high temperatures.
Mechanical Properties (Annealed)Tensile Strength (Rm): ≥ 515 - 620 MPa
Yield Strength (Rp0.2): ≥ 205 - 310 MPa
Elongation (A): ≥ 40%
Hardness (HB): ≤ 217		Good room-temperature properties, but designed for elevated temperature performance.
Elevated Temperature PropertiesContinuous Service: Up to 1150°C
Intermittent Service: Up to 1100°C
Creep Strength: Excellent up to 1000°C
Oxidation Resistance: Excellent up to 1100°C		Superior to 304/316 grades above 800°C; maintains strength better at high temperatures.
Physical PropertiesDensity: 7.98 g/cm³
Melting Range: 1400 - 1450 °C
Thermal Expansion: 15.9 × 10⁻⁶/K (20-100°C)
Thermal Conductivity: 14.2 W/m·K (100°C)
Non-magnetic when annealed		Higher density than 304; thermal expansion similar to other austenitics.
Heat TreatmentSolution Annealing: 1040-1150°C, rapid cool (water or air)
Stress Relief: Not typically required
Not hardenable by heat treatment		Must be rapidly cooled through 870-540°C range to prevent sigma phase formation.
Corrosion ResistanceExcellent oxidation resistance at high temperatures. Good general corrosion resistance similar to 304 at room temperature.High chromium provides good corrosion resistance, but not designed for chloride-rich environments.
Key Standards (Coil)ASTM A240 (Plate, Sheet, and Strip)
ASTM A480 (General Requirements)
EN 10095 (Heat-resisting steels)
JIS G4311		Specified in both general stainless steel and specialized heat-resistant steel standards.
Common Applications (from Coil)• Furnace Components: Radiant tubes, retorts, muffles, furnace linings
• Heat Treatment Equipment: Baskets, fixtures, conveyors
• Thermal Processing: Annealing covers, burner parts, thermowells
• Power Generation: Boiler parts, superheater tubes, burner nozzles
• Chemical Processing: High-temperature reactors, reformers, pyrolysis tubes
• Aerospace: Afterburner parts, exhaust systems
• Glass Manufacturing: Mold components, handling equipment		Specifically designed for continuous high-temperature operation.

Surface selection

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Packaging and transportation

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FACTORY SHOW

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FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

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