Views: 0 Author: Site Editor Publish Time: 2025-03-12 Origin: Site
Austenitic Stainless Steel 310S (UNS S31008) is a high-performance alloy renowned for its exceptional oxidation resistance and durability in elevated temperature environments. As a low-carbon variant of Type 310, it minimizes carbide precipitation during welding, enhancing its suitability for welded applications. Its austenitic structure ensures non-magnetic properties, excellent ductility, and ease of fabrication.
Chromium (Cr): 24–26% – Enhances oxidation and corrosion resistance.
Nickel (Ni): 19–22% – Stabilizes the austenitic structure and improves high-temperature strength.
Carbon (C): ≤0.08% – Low carbon content reduces susceptibility to intergranular corrosion.
Other Elements: Manganese (≤2%), Silicon (≤1.5%), with trace amounts of phosphorus and sulfur.
High-Temperature Performance: Withstands temperatures up to 1150°C (2100°F) continuously, offering superior oxidation, sulfidation, and carburization resistance.
Corrosion Resistance: Excels in oxidizing environments but less effective in chloride-rich or reducing conditions compared to 316 stainless steel.
Mechanical Strength: Retains structural integrity under thermal stress, with good creep resistance.
Fabrication-Friendly: Excellent weldability and formability; post-weld annealing is typically unnecessary due to low carbon content.
Thermal Processing: Furnace components, radiant tubes, burners, and heat treatment equipment.
Chemical/Petrochemical: Reactors, piping, and heat exchangers handling corrosive media.
Power Generation: Boiler parts and exhaust systems.
Food Processing: Equipment requiring high cleanliness and corrosion resistance.
Welding: Use AWS E/ER310 filler metals. Maintain low heat input to avoid distortion.
Machining: Employ slow speeds, sharp tools, and positive rake angles to mitigate work hardening.
Cold Working: Anneal at 1040–1120°C (1900–2050°F) post-forming to relieve stresses.
Vs. 304/316: Higher Cr/Ni content in 310S provides superior high-temperature performance.
Vs. 310: Lower carbon in 310S enhances weldability without compromising oxidation resistance.
Vs. 330 Alloy: 310S offers better oxidation resistance, while 330 excels in carburizing environments.
Standards: Complies with ASTM A240 (plate/sheet) and ASME SB-409 (bar).
Safety: Use fume extraction during welding to avoid inhalation of Cr/Ni particles; adhere to PPE protocols.
Stainless Steel 310S is ideal for industries demanding resilience in extreme heat and corrosive conditions. Its balanced composition and fabrication versatility make it a cornerstone material for high-temperature engineering solutions.
