AISI 310S Stainless Steel Plate | 310S China steel mill-Direct Supply
What is AISI 310S Stainless Steel Plate?
As a professional China steel mill-Direct Supply and stainless steel plate supplier, SHH STEEL is pleased to present AISI 310S Stainless Steel Plate.
AISI 310S (UNS S31008) is the low-carbon variant of the heat-resisting austenitic stainless steel AISI 310. It contains approximately 24–26% chromium and 19–22% nickel, providing outstanding resistance to oxidation and scaling at elevated temperatures. The carbon content is limited to a maximum of 0.08%, which significantly improves resistance to intergranular corrosion after welding compared with standard 310.
This combination makes AISI 310S the preferred choice for welded high-temperature equipment such as furnace components, radiant tubes, heat-treatment fixtures, kiln parts, petrochemical process equipment and other applications operating in severe oxidizing atmospheres.
SHH STEEL supplies AISI 310S as true China steel mill-Direct Supply, sourcing directly from major Chinese stainless steel mills. This model delivers competitive mill pricing, consistent quality, complete heat traceability and reliable delivery. SHH STEEL offers AISI 310S in plate and sheet form across a practical range of thicknesses and surface finishes suitable for elevated-temperature service.
AISI 310S is frequently compared with a240 310, a240 310h, a240 309s, a240 304, a240 321 and a240 316l when selecting materials for high-temperature welded applications. SHH STEEL provides technical support to help customers choose the most appropriate grade.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Grade | AISI 310S / UNS S31008 | Confirmed |
| Related Standards | ASTM A240, ASME SA240, related high-temperature specs | Available |
| Product Form | Plate, Sheet | Available |
| Delivery Condition | Solution Annealed | Standard |
| Thickness Range | 1 mm – 100 mm (thicker available on request) | Custom sizes supported |
| Width | Up to 2000–3000 mm | Available |
| Length | Up to 12000 mm or cut-to-length | Available |
| Surface Finish | No.1, 2B, and others on request | Available |
| Certification | EN 10204 3.1 / Mill Test Certificate | Available |
SHH STEEL can supply AISI 310S dual-certified to ASTM A240 / ASME SA240 when required by the project.
Chemical Composition
Typical Chemical Composition of AISI 310S (UNS S31008):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.50 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 24.00 – 26.00 |
| Nickel (Ni) | 19.00 – 22.00 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
The low carbon content (≤ 0.08%) is the key difference from standard AISI 310. Combined with very high chromium (24–26%) and nickel (19–22%), it delivers outstanding high-temperature oxidation resistance together with improved weldability and resistance to intergranular corrosion. SHH STEEL carefully controls composition to ensure reliable performance in welded high-temperature service.
Mechanical Properties
Annealed Condition (typical values)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2%) | ≥ 205 MPa (30 ksi) |
| Elongation (in 50 mm) | ≥ 40% |
| Hardness | ≤ 217 HB |
At elevated temperatures, AISI 310S retains useful strength and outstanding oxidation resistance. For applications requiring higher creep strength, the controlled high-carbon version a240 310h may be considered. SHH STEEL supplies material with consistent high-temperature properties.
Physical Properties Density is approximately 7.90 g/cm³. The grade is non-magnetic in the annealed condition. Melting range is approximately 1400–1450°C.
Material Comparison
| Grade | Carbon | Cr (%) | Ni (%) | Weldability & IGC | Oxidation Resistance | Typical Preference |
|---|---|---|---|---|---|---|
| AISI 310 | ≤ 0.25 | 24–26 | 19–22 | Moderate | Excellent | Non-welded severe high-temp service |
| AISI 310S | ≤ 0.08 | 24–26 | 19–22 | Excellent | Excellent | Welded severe high-temperature service |
| AISI 310H | 0.04–0.10 | 24–26 | 19–22 | Good | Excellent | High-temp strength + oxidation |
| AISI 309S | ≤ 0.08 | 22–24 | 12–15 | Excellent | Very Good | High-temperature oxidizing service |
| AISI 304 | ≤ 0.08 | 18–20 | 8–10.5 | Good | Good | General purpose |
| AISI 321 | ≤ 0.08 | 17–19 | 9–12 | Good (stabilized) | Good | Stabilized high-temp welded service |
AISI 310S is the preferred grade for welded constructions requiring outstanding high-temperature oxidation resistance. Compared with standard 310, the low carbon content provides superior resistance to intergranular corrosion after welding. For higher creep strength under load, SHH STEEL recommends a240 310h. When slightly lower alloy content is acceptable, a240 309s is often considered.
Corrosion Resistance
AISI 310S provides outstanding resistance to oxidation and scaling in air and oxidizing atmospheres at elevated temperatures up to approximately 1100°C in continuous service (depending on conditions). The low carbon content also gives it excellent resistance to intergranular corrosion after welding.
At room temperature it offers good resistance to atmospheric corrosion and many mild chemical environments. In sulfur-containing or highly carburizing atmospheres, performance may be limited. For aqueous chloride environments, SHH STEEL recommends a240 316l or a240 2205.
Weldability
AISI 310S has excellent weldability due to its low carbon content. Matching or 310L / 310S filler metals are commonly used. The reduced carbon minimizes the risk of intergranular corrosion in the as-welded condition, making post-weld annealing generally unnecessary for most applications.
SHH STEEL recommends proper welding procedures and post-weld cleaning to achieve optimum high-temperature and corrosion performance. This outstanding as-welded behavior is the main reason AISI 310S is preferred over standard 310 for fabricated high-temperature equipment.
Heat Treatment
AISI 310S is normally supplied in the solution-annealed condition by SHH STEEL.
Recommended solution annealing temperature range is 1040–1150°C, followed by rapid cooling. Proper annealing optimizes both room-temperature ductility and high-temperature oxidation resistance. SHH STEEL controls heat treatment to ensure consistent quality for elevated-temperature service.
Surface Finishes
| Finish | Description | Typical Use / Keywords |
|---|---|---|
| No.1 | Hot-rolled, annealed and pickled | AISI 310S No.1 – most common for industrial high-temp plate |
| 2B | Cold-rolled, annealed, pickled, skin-passed | AISI 310S 2B – thinner plates |
| Special | Ground or custom finishes | AISI 310S Special – on request |
SHH STEEL regularly supplies AISI 310S in No.1 finish, which is the preferred condition for most high-temperature plate applications.
Tolerances
Dimensional tolerances for AISI 310S Stainless Steel Plate supplied by SHH STEEL generally conform to ASTM A480 practices.
Typical available size range is thickness 1 mm – 100 mm, width up to 2000–3000 mm, and length up to 12000 mm or cut-to-length. SHH STEEL provides precise dimensional control and can support tighter tolerances when required.
Equivalent Material Grades
| Grade / Designation | Standard / Region | Notes |
|---|---|---|
| AISI 310S | — | — |
| UNS S31008 | Unified Numbering System | — |
| ASTM A240 Type 310S | ASTM A240 | When dual certified |
| 1.4845 / X8CrNi25-21 | EN (Europe) | European equivalent |
| SUS310S | JIS G4305 (Japan) | Japanese equivalent |
| 06Cr25Ni20 / 0Cr25Ni20 | GB/T (China) | Chinese equivalent |
| Related 310 / 310H | Multiple | Standard / high-carbon variants |
Related grades for comparison include a240 310s, a240 310h, a240 309s, a240 304, a240 321 and a240 316l.
Applications
AISI 310S is selected for welded constructions requiring outstanding high-temperature oxidation resistance. Typical applications of AISI 310S include:
| Industry / Sector | Typical Components / Equipment (with keywords) |
|---|---|
| Heat Treatment & Furnaces | AISI 310S furnace components, radiant tubes, fixtures, trays |
| Industrial Heating | AISI 310S kiln parts, muffles, supports and retorts |
| Power Generation | AISI 310S high-temperature ducting and structural parts |
| Petrochemical & Refining | AISI 310S furnace linings, process equipment and welded parts |
| Chemical Processing | AISI 310S high-temperature vessels and welded components |
| General High-Temperature Service | AISI 310S equipment operating in severe oxidizing atmospheres |
SHH STEEL supplies AISI 310S for these elevated-temperature welded applications with consistent quality. For related industry solutions, see our energy industry, petrochemical industry and equipment manufacturing pages. Supporting services include steel cutting services and steel welding services.
Why Choose SHH STEEL
SHH STEEL is a China steel mill-Direct Supply specializing in stainless steel plate and sheet. By working directly with major Chinese stainless steel mills, SHH STEEL supplies AISI 310S with the following advantages:
- Genuine China steel mill-Direct Supply pricing
- Consistent quality and complete heat traceability
- Full Mill Test Certificates (EN 10204 3.1)
- Low-carbon material optimized for welded severe high-temperature service
- Flexible dimensions and surface finishes (including AISI 310S No.1 and AISI 310S 2B)
- Technical support for selection among 310, 310S, 310H, 309S and related grades
- Value-added services including steel cutting services, steel welding services and worldwide shipping service
For more information about our company and full product range, please visit China steel Mill Agent-SHH STEEL.
FAQ
- What is the main advantage of AISI 310S over standard AISI 310?The low carbon content (≤ 0.08%) provides significantly better resistance to intergranular corrosion after welding while retaining outstanding high-temperature oxidation resistance. SHH STEEL recommends 310S for most welded high-temperature applications.
- How does AISI 310S compare with AISI 310H?AISI 310H has controlled higher carbon for improved high-temperature strength and creep resistance. SHH STEEL recommends 310H when long-term strength under load is the priority, and 310S when weldability and intergranular corrosion resistance are more important.
- What is the density of AISI 310S?Approximately 7.90 g/cm³. SHH STEEL provides material certificates confirming physical and mechanical properties.
Conclusion
AISI 310S Stainless Steel Plate is the low-carbon version of the high-chromium, high-nickel (25Cr-20Ni) heat-resisting grade 310. It combines outstanding high-temperature oxidation resistance with improved weldability and superior resistance to intergranular corrosion, making it the preferred material for welded furnace components, radiant tubes, heat-treatment equipment, kiln parts and petrochemical process equipment operating in severe oxidizing atmospheres.
As a professional China steel mill-Direct Supply, SHH STEEL provides high-quality AISI 310S Stainless Steel Plate with competitive pricing, full certification and complete technical support.
Contact SHH STEEL today for stock availability, surface finish options (including AISI 310S No.1 and AISI 310S 2B), or a competitive quotation.
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