Product Specification

Heat Resistant S31008 / 1.4845 / 310S Stainless Steel Plate 4ft*8ft 5ft*10ft SS Plate With EN 10204-3.1 Certificate

Heat Resistant S31008 / 1.4845 / 310S Stainless Steel Plate – 4ft×8ft & 5ft×10ft SS Plate with EN 10204-3.1 Certificate

Introduction

When extreme temperatures, aggressive atmospheres, and long-term reliability are critical, S31008 (also known as 310S or 1.4845) stainless steel stands out as one of the most trusted high-alloy austenitic grades in industrial applications. Engineered for superior oxidation resistance up to 1035°C (1900°F), this material combines high chromium (25%) and nickel (20%) content to deliver exceptional performance in continuous high-heat environments.

We supply certified heat-resistant 310S stainless steel plates in standard large sizes—4ft × 8ft (1219 × 2438 mm) and 5ft × 10ft (1524 × 3048 mm)—ideal for fabrication, machining, welding, or direct use in demanding sectors such as petrochemical, power generation, aerospace, and industrial furnace manufacturing. Every plate comes with a full EN 10204 3.1 Mill Test Certificate, ensuring traceability, compliance, and confidence in material integrity.

Why Choose 310S (S31008 / 1.4845) Stainless Steel?

310S is the low-carbon variant of Type 310 stainless steel, specifically designed to minimize carbide precipitation during welding and high-temperature service. This makes it ideal for applications requiring prolonged exposure to elevated temperatures without sensitization or intergranular corrosion.

Key advantages include:

• Outstanding resistance to oxidation and scaling in air up to 1035°C
• Excellent creep strength and structural stability under thermal cycling
• Good resistance to sulfidation and molten salt corrosion
• Non-magnetic in annealed condition
• Fully weldable using common techniques (TIG, MIG, SMAW)

Its balanced composition ensures durability where other stainless grades would rapidly degrade.

Material Designations & Equivalents

This global recognition ensures seamless integration into international supply chains and engineering specifications.

Chemical Composition (Per ASTM A240 / EN 10088-2)

The controlled carbon level (<0.08%) prevents chromium carbide formation at grain boundaries, preserving corrosion resistance after welding or high-temp exposure.

Mechanical Properties (Annealed Condition)

These properties support both structural integrity and thermal shock resistance—critical for components like radiant tubes, muffles, and burner nozzles.

Available Plate Dimensions & Specifications

We stock and supply hot-rolled 310S stainless steel plates in two popular large-format sizes, suitable for cutting, shearing, or laser profiling:

All plates are manufactured in ISO 9001-certified mills and undergo ultrasonic testing upon request.

What Is an EN 10204 3.1 Certificate?

The EN 10204 3.1 certificate is a globally recognized quality document that provides:

• Full chemical composition per heat number
• Actual mechanical test results (tensile, yield, elongation)
• Compliance statement with relevant standards (e.g., ASTM A240, EN 10088-2)
• Manufacturer’s declaration of conformity
• Traceability from raw material to final product

This certificate is mandatory for projects in pressure equipment (PED 2014/68/EU), nuclear, oil & gas, and aerospace industries—ensuring your 310S plates meet stringent safety and performance criteria.

Comparison: 310S vs. Other Heat-Resistant Alloys

For most industrial heating applications below 1050°C, 310S offers the best balance of cost, fabricability, and longevity—especially when certified material traceability is required.

Common Industrial Applications

Thanks to its dual capability as a high-temperature structural alloy and corrosion-resistant material, 310S plates are used across critical sectors:

• Industrial Furnaces: Retorts, muffles, radiant tubes, hearth plates
• Heat Treatment Equipment: Baskets, trays, fixtures, sintering boats
• Power Plants: Superheater supports, boiler baffles, flue gas ducts
• Chemical & Petrochemical: Reactor linings, catalyst support grids, reformer tubes
• Waste Incineration: Combustion chambers, grates, ash handling systems
• Automotive & Aerospace: Exhaust manifolds, turbine shrouds, afterburner parts

Large 4ft×8ft and 5ft×10ft plates allow for efficient nesting of multiple components, reducing waste and fabrication time.

Fabrication & Machining Guidelines

While 310S is tougher than standard 304/316 grades due to its high alloy content, it can be successfully processed with proper techniques:

• Cutting: Plasma, laser, or waterjet recommended. Oxy-fuel not suitable.
• Machining: Use rigid setups, sharp tools, low speeds, and high lubrication. Expect work hardening.
• Welding: No preheat required. Use matching filler (ER310 or 310MoLN). Post-weld annealing usually unnecessary.
• Forming: Good ductility allows bending and rolling—springback is higher than mild steel.
• Heat Treatment: Solution anneal at 1040–1150°C followed by rapid quenching if needed.

Our technical team can provide design-for-manufacturing (DFM) support to optimize your part layout on standard plate sizes.

Quality Assurance & Testing

Every batch of our 310S plates undergoes rigorous quality control:

✅ Positive Material Identification (PMI) via XRF
✅ Tensile & hardness testing per ASTM E8/E18
✅ Ultrasonic testing (UT) for internal defects (optional)
✅ Dimensional inspection (thickness tolerance ±0.1–0.3 mm depending on gauge)
✅ Full EN 10204 3.1 certification with heat number traceability

We also offer third-party inspection (e.g., SGS, Bureau Veritas) upon request.

Packaging & Delivery

To ensure safe transit and prevent surface damage or moisture exposure:

• Plates are wrapped in anti-corrosion VCI paper
• Bundled with steel straps and labeled with grade, size, heat number, and certificate reference
• Export shipments packed in fumigated wooden crates (ISPM 15 compliant)
• Global shipping via sea, air, or land with real-time tracking

Lead times:

• Stock items: 3–7 days
• Custom thickness or finish: 2–4 weeks

Sustainability & Recyclability

310S stainless steel contains up to 70% recycled content and is 100% recyclable at end-of-life. Our supply chain adheres to responsible sourcing principles, and all processing waste (e.g., cut-offs) is returned to certified scrap recyclers—supporting circular economy goals.

Ordering Information

To place an order or request a quote, please specify:

1. Grade: Confirm S31008 / 310S / 1.4845
2. Dimensions: e.g., 4ft×8ft × 12mm or 5ft×10ft × 25mm
3. Quantity: Number of plates or total weight (kg/tons)
4. Surface Finish: Hot-rolled (standard), pickled, or brushed
5. Certification: EN 10204 3.1 (included); additional tests if needed
6. Destination: For accurate freight calculation

Conclusion

For engineers and procurement professionals seeking certified, high-performance stainless steel for extreme environments, our S31008 / 1.4845 / 310S plates in 4ft×8ft and 5ft×10ft sizes offer unmatched reliability, global standard compliance, and full material traceability through EN 10204 3.1 certification.

Backed by decades of metallurgical expertise, ISO-certified production, and responsive customer service, we ensure your project receives material that performs—every time.

Contact us today for a competitive quote, CAD-ready data sheets, or technical consultation on your next high-temperature application.

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