310S stainless steel sheet is a low-carbon austenitic stainless sheet designed for applications that require both elevated-temperature oxidation resistance and reliable fabrication. With approximately 24–26% chromium and 19–22% nickel, it is widely selected for furnace panels, heat shields, thermal equipment, and chemical-process components.

For thin-gauge applications, common thicknesses range from 0.5 mm to 3.0 mm. The most frequently specified surfaces are 2B for a smooth cold-rolled finish and No.1 for a hot-rolled finish. When the sheet will be welded, the low-carbon 310S grade is often preferred over standard 310.

310S Stainless Steel Sheet Specifications

The sheet is normally supplied in austenitic condition. For many industrial projects, the choice starts with thickness, width, surface finish, and required cutting dimensions.

Thickness and width combinations are not necessarily available in every surface condition. Therefore, buyers should provide the complete size and finish requirement when requesting stock confirmation.

Common Gauges for Thin Sheet

Thin sheet is normally selected when the component needs heat resistance without the weight of a thick plate. The following sizes cover several common fabrication requirements.

2B vs No.1 Surface

Surface finish should be selected according to the application rather than treated as a cosmetic detail. The two common choices for thin and medium-gauge material have different production routes and appearances.

For furnace interiors or components where the surface will be exposed directly to heat, No.1 can be a practical choice. Where a smoother appearance or easier cleaning is needed, 2B is often considered first.

Applications of Thin 310S Sheet

The combination of high chromium, high nickel, and low carbon makes this material suitable for fabricated components exposed to elevated temperatures and oxidation.

Processing Options

Thin sheet can be supplied as standard-size material or processed to the dimensions required by the fabrication drawing. The processing method should be selected according to thickness, geometry, tolerance, and production volume.

Laser Cutting

Laser cutting is suitable for many thin-sheet profiles and can provide accurate contours with relatively narrow kerfs. Cutting parameters should be adjusted for stainless steel thickness and the selected assist gas. Edge quality should be checked when the parts will be used at elevated temperatures.

Bending

The austenitic structure provides good ductility, but stainless steel can experience springback and work hardening during forming. Bend radius, tooling, rolling direction, and required angle should therefore be considered before production.

Punching

Punching can be used for holes, slots, and repeated patterns. Because austenitic stainless steel work-hardens, tooling condition and clearance should be controlled to reduce deformation and premature tool wear.

Cut-to-Length

When standard sheet dimensions do not match the drawing, cut-to-length processing can reduce material waste and simplify fabrication. Required tolerances should be stated before cutting.

Common Stock Sizes

For routine procurement, buyers often begin with the following thickness and width combinations. These are typical requested sizes rather than a guarantee of current inventory.

For a stock inquiry, it is better to provide the complete combination of grade + thickness + width + surface + quantity. This allows available material to be matched more accurately.

310S Sheet vs 310 Sheet

Both grades belong to the same high-alloy chromium-nickel austenitic family. The main distinction is carbon content. 310S has a maximum carbon level of 0.08%, while Type 310 allows up to 0.25% under ASTM A240.

For a welded furnace panel, heat shield, or fabricated thermal enclosure, 310S is often the more practical starting point. For components where sustained high-temperature strength is the dominant concern, the higher-carbon grade may warrant consideration.

Why 310S Works at High Temperature

The alloy contains a high level of chromium and nickel. Chromium promotes formation of a protective chromium-rich oxide scale, while nickel stabilizes the austenitic structure. This combination provides strong resistance to oxidation and scaling in suitable high-temperature environments.

However, a material's maximum service temperature cannot be defined by one number alone. Atmosphere, thermal cycling, stress, section thickness, exposure time, and corrosive gases can significantly affect performance. Furnace designers should therefore evaluate the complete operating environment rather than rely only on a nominal temperature rating.

How to Specify a Sheet for Purchase

A clear RFQ prevents most misunderstandings. Instead of sending only “310S sheet,” provide the following information:

1. Grade: 310S / UNS S31008
2. Standard: ASTM A240 or the project-required standard
3. Thickness: for example, 1.5 mm
4. Width: for example, 1219 mm
5. Length: standard or required cut length
6. Surface: 2B or No.1
7. Quantity: sheets, pieces, or total weight
8. Processing: laser cutting, bending, punching, or cut-to-length if required
9. Inspection: certificate or third-party inspection requirements where applicable

Supply and Cut-to-Length Service

For industrial buyers, standard stock dimensions are not always suitable for the final component. Teda Ganghua can support sourcing of stainless steel products according to grade, size, surface, and processing requirements. Sheet and coil can be matched with services such as cutting, bending, punching, and other fabrication support according to the project specification.

For a cut-to-length request, provide the finished dimensions, allowable tolerance, quantity, edge condition, and drawing requirements. This makes it easier to determine whether standard sheets, coil processing, or direct cutting is the most efficient supply route.

Frequently Asked Questions

1. What thicknesses are common for 310S stainless steel sheet?

For thin-sheet applications, 0.5, 0.8, 1.0, 1.5, 2.0, and 3.0 mm are commonly requested sizes. Actual stock depends on width, surface finish, and supplier inventory.

2. Should I choose 2B or No.1 surface?

Choose 2B when a smoother, more uniform surface is preferred. No.1 is often practical for furnace and thermal-equipment components where appearance is less important.

3. Is 310S better than 310 for welded sheet?

310S is often preferred for welded fabrication because its lower carbon content reduces the potential for chromium carbide precipitation during thermal exposure. However, the final selection should follow the project's welding and service requirements.

4. Can 310S sheet be laser cut and bent?

Yes. Thin sheet can generally be laser cut and formed. Work hardening and springback should be considered during bending, while cutting parameters should be adjusted according to thickness and equipment.

5. Can I request custom cut-to-length sheets?

Yes. Custom cutting can be specified by finished length, width, tolerance, quantity, edge condition, and drawing requirements. The required grade, surface, and thickness should also be stated in the RFQ.