ASTM A240 Type 310S Stainless Steel Sheet & Plate
What is ASTM A240 Type 310S Stainless Steel Sheet & Plate?
As a professional stainless steel supplier, SHH STEEL is pleased to present ASTM A240 Type 310S Stainless Steel Sheet and Plate. Also known as UNS S31008 or SS310S, this grade is a low-carbon austenitic stainless steel containing approximately 25% chromium and 20% nickel. It is specifically designed for continuous service at elevated temperatures where excellent oxidation resistance and strength are required.
Type 310S offers superior resistance to oxidation in continuous service up to about 1100°C and intermittent service up to 1150°C in air. The low carbon content (maximum 0.08%) improves weldability and reduces the risk of intergranular corrosion compared with standard Type 310. SHH STEEL supplies ASTM A240 Type 310S in both sheet and plate forms, covering thicknesses from 0.5 mm to 100 mm, with widths up to 2500 mm and lengths up to 12000 mm. Custom sizes and surface finishes are available.
The material is typically delivered in the solution-annealed condition with full Mill Test Certificates (EN 10204 3.1). Whether for thin sheet fabrication or heavy plate applications, SHH STEEL provides consistent quality for demanding high-temperature projects worldwide.
ASTM A240 Type 310S Material Specification
ASTM A240 Type 310S stainless steel sheet and plate are manufactured in accordance with ASTM A240/A240M and ASME SA-240. This specification covers chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications, including severe high-temperature service.
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | ASTM A240 / ASME SA-240 Type 310S | Full compliance |
| Product Form | Sheet and Plate | Both available |
| Thickness Range | 0.5 mm – 100 mm | Custom sizes available |
| Width / Length | Up to 2500 mm / 12000 mm | Custom fabrication supported |
| Surface Finish | 2B, No.1, BA, HL, No.4 | Multiple options |
| Heat Treatment Condition | Solution Annealed | Standard supply condition |
| Certification | EN 10204 3.1 / 3.2 | Available |
ASTM A240 Type 310S Chemical Composition
The chemical composition of ASTM A240 Type 310S is optimized for maximum high-temperature oxidation resistance.
| Element | Content (%) | Standard Limit | Role |
|---|---|---|---|
| Carbon (C) | ≤ 0.08 | 0.08 max | Low carbon for improved weldability |
| Manganese (Mn) | ≤ 2.00 | 2.00 max | Deoxidation and strength |
| Phosphorus (P) | ≤ 0.045 | 0.045 max | Impurity control |
| Sulfur (S) | ≤ 0.030 | 0.030 max | Cleanliness |
| Silicon (Si) | ≤ 1.50 | 1.50 max | Enhances oxidation resistance |
| Chromium (Cr) | 24.00 – 26.00 | 24.00 – 26.00 | Excellent high-temperature oxidation resistance |
| Nickel (Ni) | 19.00 – 22.00 | 19.00 – 22.00 | Austenite stability and high-temperature strength |
ASTM A240 Type 310S Mechanical Properties
In the solution-annealed condition, ASTM A240 Type 310S provides reliable room-temperature strength and outstanding performance at elevated temperatures.
| Property | Value | Test Method |
|---|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) | ASTM A370 |
| Yield Strength (0.2% Offset) | ≥ 205 MPa (30 ksi) | ASTM A370 |
| Elongation in 50 mm | ≥ 40% | ASTM A370 |
| Hardness | ≤ 217 HB / ≤ 95 HRB | ASTM E10/E18 |
| Density | 8.00 g/cm³ | — |
Delivery Conditions
SHH STEEL supplies ASTM A240 Type 310S primarily in the solution-annealed and pickled condition. Common surface finishes include 2B, No.1, BA, HL, and No.4. Protective PVC film can be applied on request to protect the surface during transportation and fabrication.
Tolerances
Dimensional tolerances for ASTM A240 Type 310S sheet and plate are governed by ASTM A480/A480M.
Thickness Tolerances Thickness tolerances vary according to product form and thickness. Cold-rolled sheet has tighter tolerances, while hot-rolled plate follows the standard allowable deviations. Tighter-than-standard tolerances can be arranged for precision applications.
Width and Length Tolerances Standard width tolerance is typically +6 mm / 0 mm. Length tolerance for cut-to-length material is normally +10 mm / 0 mm. Precision cutting and closer tolerances are available upon request.
Flatness Flatness is controlled according to ASTM A480. Improved flatness material can be supplied for critical fabrication requirements such as laser cutting or large panels.
Edge Condition Sheet is usually supplied with mill edge or slit edge. Plate can be supplied with mill edge, sheared edge, or plasma/laser cut edge according to customer requirements.
ASTM A240 Type 310S Weldability
ASTM A240 Type 310S offers good weldability due to its controlled low carbon content. It can be welded by all common fusion welding processes, including GTAW (TIG), GMAW (MIG), SMAW, and plasma welding.
Matching or over-alloyed filler metals such as ER310 are commonly recommended. Preheating is generally not required. Due to the high chromium and nickel content, the material maintains good oxidation resistance in the heat-affected zone. Post-weld cleaning and passivation are recommended to restore full high-temperature performance. In most cases, post-weld heat treatment is not necessary.
Equivalent Material Grades
| Grade | Standard | Designation |
|---|---|---|
| Type 310S | ASTM A240 / ASME SA-240 | — |
| UNS S31008 | Unified Numbering System | S31008 |
| 1.4845 | EN 10088 / EN 10095 | X8CrNi25-21 |
| SUS310S | JIS G4304 / G4305 | — |
| 06Cr25Ni20 | GB/T 20878 / GB/T 4237 | Chinese National Standard |
| X8CrNi25-21 | DIN / EN | — |
Applications
ASTM A240 Type 310S is primarily used in extreme high-temperature environments where outstanding oxidation resistance is required. Typical applications are shown below:
| Application Area | Typical Components / Uses |
|---|---|
| Furnace & Heat Treatment | Furnace parts, radiant tubes, muffles, retorts, baffles |
| Kiln & Calciner Equipment | Kiln linings, rotary kiln components, calciner parts |
| Power Generation | Combustion chambers, heat shields, tube supports |
| Chemical & Petrochemical | High-temperature reactors and process equipment |
| Glass & Ceramics Industry | Glass melting equipment, annealing covers |
| General High-Temperature Service | Thermowells, refractory anchors, structural furnace parts |
Why Choose SHH STEEL
SHH STEEL maintains long-term strategic cooperation with major Chinese stainless steel mills and acts as a first-level (primary) agent for these mills. This direct partnership enables us to offer competitive pricing advantages, faster delivery times, and consistent quality assurance that many traders cannot match.
All ASTM A240 Type 310S material is sourced from reputable Chinese mills under strict quality control, supplied with complete Mill Test Certificates, and supported by our professional export team. Customers benefit from reliable supply, short lead times, and cost-effective solutions for high-temperature applications worldwide.
FAQ
- What is the main difference between 310 and 310S?Type 310S has a lower maximum carbon content (0.08% max) compared with standard Type 310 (0.25% max). The lower carbon improves weldability and reduces the risk of intergranular corrosion.
- What is the maximum continuous service temperature for ASTM A240 Type 310S?Approximately 1100°C in continuous service in air, and up to about 1150°C in intermittent service, depending on the environment.
- What is the Chinese equivalent of ASTM A240 Type 310S?The common Chinese designation is 06Cr25Ni20.
- What is the density of ASTM A240 Type 310S?Approximately 8.00 g/cm³.
Conclusion
ASTM A240 Type 310S Stainless Steel Sheet and Plate from SHH STEEL offer outstanding high-temperature oxidation resistance, good strength, and improved weldability due to low carbon content. Backed by strategic partnerships with Chinese mills, competitive pricing, fast delivery, and reliable quality, we provide trusted solutions for furnace, kiln, and other extreme elevated-temperature applications worldwide.
Contact SHH STEEL today for your ASTM A240 Type 310S requirements.
Keywords
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