316 / 316L

316 (UNS S31600) is a molybdenum-containing austenitic stainless steel, a high-performance variant of 304 stainless steel. It is famous for excellent resistance to chloride corrosion (a key advantage over 304) and good high-temperature stability. It maintains reliable mechanical properties in moderate-temperature environments (up to 870 °C) and has strong adaptability to harsh media, making it ideal for corrosion-prone industrial, marine, and medical applications.​.

Behaviour that matters in service

• Chloride Corrosion Resistance — Outstanding resistance to chloride-containing media (e.g., seawater, brine, chemical solutions with chlorine ions); effectively prevents pitting and crevice corrosion, a critical advantage over conventional stainless steels like 304.​.
• Oxidation Resistance — Good oxidation resistance at temperatures up to 870 °C; forms a dense chromium-molybdenum oxide film on the surface to resist high-temperature gas erosion and avoid film spalling during moderate thermal cycling.​.
• Mechanical Strength — Maintains balanced tensile strength, yield strength, and toughness at room and moderate temperatures; low creep deformation under long-term service at 500 – 600 °C, ensuring structural stability of components.​.
• Excellent Formability — Easy to process via cold working (e.g., rolling, stamping, bending) and hot working (e.g., forging, extrusion); can be fabricated into complex-shaped parts without cracking, suitable for customized product manufacturing.​.
• Reliable Weldability — Compatible with standard welding methods (e.g., TIG welding, MIG welding); welded joints retain good corrosion resistance (especially chloride corrosion resistance) and mechanical properties, meeting the performance requirements of industrial equipment.​.

Typical applications

• Marine Engineering — Widely used in offshore platforms, ship hull components, seawater pipelines, and marine pumps; resistant to long-term seawater erosion and marine atmospheric corrosion.​.
• Chemical & Pharmaceutical Industry — Applied to equipment handling chloride-containing or corrosive media, such as chemical reaction kettles, acid-resistant pipelines, pharmaceutical sterile tanks, and heat exchangers for acidic solutions.​.
• Food Processing Industry — Used in food production lines (especially for salty or acidic foods), beverage storage tanks, and dairy processing equipment; meets food-grade hygiene standards and resists corrosion from food additives.​.
• Medical Equipment — Employed in surgical instruments, medical implants (e.g., artificial joints), and hospital disinfection equipment; non-toxic, corrosion-resistant, and easy to sterilize (adapts to high-temperature or chemical disinfection).​.
• Architecture & Outdoor Engineering — Used in outdoor decorative components, coastal building facades, and high-humidity environment handrails; resists atmospheric corrosion and rainwater erosion, maintaining long-term aesthetic appearance.