310s Stainless Steel Plate

310S stainless steel plate is a premium austenitic alloy plate engineered for extreme high-temperature performance and superior oxidation resistance, setting it apart from martensitic grades like 410. With a high chromium-nickel composition (24-26% Cr, 19-22% Ni) and low carbon content (≤0.08%), it forms a dense, self-healing oxide layer that withstands continuous exposure to temperatures up to 1150°C—making it the top choice for industrial furnaces, thermal processing equipment, and high-heat structural applications where durability under extreme heat is non-negotiable.

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Product Introduction

310S stainless steel plate is a premium austenitic alloy plate engineered for extreme high-temperature performance and superior oxidation resistance, setting it apart from martensitic grades like 410. With a high chromium-nickel composition (24-26% Cr, 19-22% Ni) and low carbon content (≤0.08%), it forms a dense, self-healing oxide layer that withstands continuous exposure to temperatures up to 1150°C-making it the top choice for industrial furnaces, thermal processing equipment, and high-heat structural applications where durability under extreme heat is non-negotiable.

Core Traits of 310S Stainless Steel Plate

Extreme High-Temperature Stability

Maintains structural integrity at continuous service temperatures up to 1150°C and short-term peaks of 1200°C, far exceeding the heat tolerance of 304, 316L, or 410 grades-ideal for furnace liners and radiant tubes.

Superior Oxidation & Sulfidation Resistance

The high Cr-Ni content forms a robust chromium oxide layer that resists scaling and degradation in cyclic high-heat, oxidizing, or mild sulfidizing atmospheres (e.g., industrial furnace environments).

Excellent Weldability

Retains mechanical properties and corrosion resistance after welding (TIG/MIG/submerged arc) without mandatory post-weld annealing, facilitating fabrication of large high-heat assemblies like boiler components.

Balanced Mechanical Strength

Boasts minimum tensile strength of 515 MPa and 40% elongation, providing both structural rigidity for heavy-duty parts and ductility for forming complex shapes.

Broad Corrosion Resistance

Beyond high-heat performance, it resists mild chemicals, atmospheric moisture, and industrial pollutants-adding versatility for applications that alternate between high heat and ambient conditions.

Technical Specifications

Parameter	Details	Practical Value
Alloy Composition	24-26% Cr, 19-22% Ni, ≤0.08% C, ≤1.5% Mn	High Cr-Ni enhances heat/oxidation resistance; low carbon reduces carbide precipitation
Tensile Strength	≥515 MPa	Ensures load-bearing capacity for high-heat structural components
Elongation	≥40%	Enables forming (bending, rolling) of thick plates without brittle failure
Hardness	≤90 HRB	Balances workability with high-temperature wear resistance
Max Continuous Service Temp	1150°C	Suitable for long-term exposure to extreme heat (e.g., furnace interiors)
Short-Term Peak Temp	1200°C	Withstands transient high-heat events in thermal processing
Thickness Range	5.0-150mm (±0.05mm tolerance)	Covers heavy-duty high-heat parts like hearth plates and reactor liners

Processing Guidelines for Plate

Welding Performance

Compatible with TIG, MIG, and submerged arc welding-use matching 310S filler metal to maintain high-temperature resistance. Welds retain oxidation resistance without post-weld heat treatment for most applications.

For thick plates (≥50mm), preheating to 150-200°C is recommended to prevent cold cracking during welding.

Cutting & Forming

Supports plasma cutting, oxy-fuel cutting, and CNC machining for precise shaping of thick high-heat components (e.g., kiln shelves, heat exchanger shells).

Cold forming is feasible for moderate bends; hot forming (at 800-1000°C) is recommended for tight radii or thick plates to avoid work hardening.

Typical Application Scenarios

Industrial Furnace Components

Furnace liners, hearth plates, radiant tubes, and retorts-withstanding continuous extreme heat and oxidizing atmospheres.

Thermal Processing Equipment

Annealing baskets, kiln furniture, and heat treatment trays-resisting scaling and deformation during cyclic heating/cooling.

Power Generation

Boiler superheater tubes, exhaust system components, and turbine casings-handling high-temperature steam and combustion gases.

Chemical & Petrochemical

High-temperature reaction vessels, catalytic cracker liners, and flue gas ducts-combining heat resistance with resistance to mild chemical corrosion.

310S stainless steel plate stands as the gold standard for extreme high-temperature applications, where its high Cr-Ni composition and heat stability outperform both austenitic (316L) and martensitic (410) grades. Its unique ability to retain strength and oxidation resistance at 1150°C makes it indispensable in metallurgy, power generation, and thermal processing-delivering reliable performance in the most demanding heat-intensive environments. Whether in industrial furnaces or power plant boilers, it ensures long-term durability under extreme thermal stress.

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