Product Specification

Corrosion-Resistant 310S Stainless Steel Plate 1.4845 / S31008 Alloy for Extreme Environments

Corrosion-Resistant 310S Stainless Steel Plate 1.4845 / S31008 Alloy for Extreme Environments

Product Overview

310S stainless steel plate (UNS S31008, EN 1.4845) is a premium-grade, high-alloy austenitic stainless steel engineered for extreme environments where high-temperature oxidation resistance, thermal stability, and moderate corrosion resistance are critical. With a composition of approximately 25% chromium and 20% nickel, and an ultra-low carbon content (≤0.08%), 310S delivers exceptional performance in continuous service temperatures up to 1150°C (2100°F).

Unlike standard grades like 304 or 316, which degrade rapidly above 800°C, 310S maintains structural integrity in aggressive thermal and mildly corrosive atmospheres—making it ideal for petrochemical processing, waste incineration, heat treatment furnaces, power generation, and chemical synthesis systems. Its “S” designation signifies special low-carbon chemistry, which prevents sensitization during welding or prolonged high-temperature exposure, ensuring long-term reliability in welded fabrications.

This product is widely specified under international standards including ASTM A240, EN 10088-2, and JIS G 4304, and is trusted globally for mission-critical components operating at the edge of conventional metallurgy.

Key Features & Benefits

• ✅ Excellent oxidation resistance up to 1150°C in air
• ✅ Resists carburization and sulfidation in hydrocarbon-rich or sulfur-containing gases
• ✅ Non-magnetic in annealed condition
• ✅ Good creep and rupture strength at elevated temperatures
• ✅ Weldable without post-weld heat treatment
• ✅ Fully recyclable and compliant with environmental regulations

Chemical Composition (Weight %)

Note: Low carbon content prevents chromium carbide precipitation, enhancing intergranular corrosion resistance after welding.

Mechanical Properties (Annealed Condition, Room Temperature)

These values meet or exceed requirements of ASTM A240 and EN 10088-2.

Product Standards & Certifications

Our 310S stainless steel plates are manufactured and tested in strict compliance with the following international standards:

All shipments include a Mill Test Report (EN 10204 3.1) with full chemical and mechanical data. Additional certifications (PMI, UT, NDT) available upon request.

Equivalent Grades Worldwide

310S is recognized under multiple naming systems globally. Key equivalents include:

Note: While compositions are nearly identical, minor tolerances may exist between regional standards.

Available Product Forms

Beyond plate, we supply 310S in a full range of forms to support integrated project needs:

Custom cutting (plasma, laser, waterjet), machining, and surface finishing (pickled, blasted, BA) are available.

Packaging & Transportation

To ensure safe delivery and surface protection:

• Standard Packaging:

  • Plates bundled with steel straps
  • Interleaved with waterproof paper or VCI film
  • Edges protected with plastic or wood corner guards
  • Marked with grade, heat number, dimensions, and standards

• Optional Upgrades:

  • Wooden crates for export or heavy-gauge plates
  • Desiccant packs for humid climates
  • Custom labeling per customer PO

• Shipping:

  • FCL/LCL by sea, air freight, or land transport
  • Compliance with IMDG and ISO container standards
  • Full documentation (COO, packing list, MTR, CE declaration if applicable)

Frequently Asked Questions (FAQ)

Q1: Is 310S stainless steel suitable for seawater or marine environments?

No. Despite its high alloy content, 310S contains no molybdenum (Mo), making it vulnerable to pitting and crevice corrosion in chloride-rich environments. For marine use, consider 316L, 2205 duplex, or 6% Mo super austenitic grades.

Q2: What’s the difference between 310 and 310S?

310S has lower carbon (≤0.08%) vs. 310 (≤0.25%). The “S” version minimizes carbide precipitation during welding or high-temp service, offering better intergranular corrosion resistance—critical for welded structures.

Q3: Can 310S be used in reducing (oxygen-poor) atmospheres?

With caution. 310S excels in oxidizing environments (air, O₂-rich flue gas). In strongly reducing or carburizing conditions above 900°C, consider Alloy 800H or Inconel 601, which offer superior resistance to metal dusting and carbon ingress.

Q4: Is 310S magnetic?

Generally no—it’s austenitic and non-magnetic in the annealed state. However, cold working may induce slight magnetism, which disappears after annealing.

Q5: What surface finish is recommended for furnace applications?

No.1 (hot-rolled, annealed, and pickled) is standard—it removes scale and provides a uniform matte surface ideal for high-temperature service. Avoid polished finishes, which may trap contaminants.

Q6: How does 310S compare to Inconel 600?

Inconel 600 offers higher strength above 1000°C and better resistance to carburization, but at 3–5× the cost. 310S is often the most cost-effective solution for oxidizing atmospheres up to 1150°C.

Why Choose 310S for Extreme Environments?

310S strikes a rare balance:

• Performance: Unmatched oxidation resistance among stainless steels
• Fabricability: Easily welded, formed, and machined
• Value: Far more economical than nickel-based superalloys
• Reliability: Proven in decades of industrial service worldwide

Whether you’re building a catalytic reformer, a biomass boiler, or a high-vacuum sintering furnace, 310S delivers the resilience your process demands.

Contact Us

Ready to specify 310S for your next high-temperature project?
We offer:

• Free material consultation
• Cut-to-size plates with grain control
• Mill-certified stock in 1.4845 / S31008
• Global shipping with full traceability