310S Stainless Steel (1.4845)

310S stainless steel offers dependable strength and creep resistance, even under continuous thermal stress. These qualities are critical in environments like furnace internals, heat exchangers, and high-temperature pressure vessels where material fatigue must be minimised.

Tensile Strength: 515–655 MPa (75,000–95,000 psi) – Handles high mechanical loads at elevated temperatures.

Yield Strength (0.2%): 205–310 MPa (30,000–45,000 psi) – Resists permanent deformation in thermal and pressure applications.

Elongation: 40% – Maintains ductility during forming and thermal cycling.

Hardness (Brinell): 217 – Ensures wear resistance in abrasive or high-contact environments.

Modulus of Elasticity: 193 GPa (28 × 10⁶ psi) – Provides stiffness and dimensional stability under load.

These mechanical values make 310S a reliable choice for structural components in thermally aggressive industrial processes.

The physical profile of 310S supports its use in high-heat and thermally cycling systems, offering excellent stability, heat transfer efficiency, and thermal expansion control.

Physical Properties:

Density: 8.0 g/cm³ – Enables strong load-bearing performance in high-temperature structures.

Melting Point: 1402–1454 °C (2555–2650 °F) – Suitable for continuous use in environments approaching 1150 °C.

Thermal Conductivity: 14.2 W/m·K – Manages heat flow effectively in kilns, heaters, and exchanger plates.

Thermal Expansion: 16.3 × 10⁻⁶/K – Accommodates dimensional shifts across thermal cycles without stress cracking.

Specific Heat Capacity: ~0.50 J/g·K – Absorbs and releases thermal energy efficiently for dynamic thermal environments.

Modulus of Elasticity: 193 GPa – Contributes to stiffness and strength retention under high loads.

This thermal profile ensures stable, long-term performance in refinery towers, incinerators, and industrial furnaces.

Several variants of 310 stainless steel exist to meet application-specific performance needs:

310H: High-carbon variant offering increased creep strength at sustained temperatures above 800°C.

310MoLN: Molybdenum and nitrogen additions improve pitting resistance in aggressive media.

310Si: High-silicon grade used in continuous casting moulds and furnace linings.

310L: Ultra-low carbon for ultra-critical welding applications where carbide precipitation must be eliminated.

Each variant offers a tailored solution depending on welding conditions, temperature demands, and corrosion exposure.