Chemical Composition

• Chromium (16.0–18.0%): Enhances corrosion resistance by forming a protective oxide layer.
• Nickel (10.0–14.0%): Stabilizes the austenitic structure, improving ductility and toughness.
• Molybdenum (2.0–3.0%): Boosts resistance to pitting and crevice corrosion, especially in chloride-rich environments (e.g., seawater, chemical processing).
• Carbon (0.04–0.10%): Increases high-temperature strength, preventing grain boundary 弱化 under prolonged heat exposure.

Mechanical Properties

• Tensile Strength: 515 MPa (minimum).
• Yield Strength: 205 MPa (minimum).
• Elongation: 40% (minimum), ensuring good formability.
• Temperature Resistance: Performs reliably up to 800°C (1472°F), making it suitable for high-heat applications like furnace components or exhaust systems.

Key Advantages

1. Superior High-Temperature Strength: The higher carbon content resists creep (slow deformation under stress) at elevated temperatures, outperforming standard 316 in long-term heat exposure.
2. Excellent Corrosion Resistance: Molybdenum addition provides resistance to chloride-induced corrosion, making it ideal for marine, chemical, and offshore environments.
3. Weldability: Compatible with common welding techniques (e.g., TIG, MIG), though post-weld annealing may be required for maximum corrosion resistance in critical applications.

Typical Applications

• Petrochemical and chemical processing equipment (reactors, pipelines).
• Power generation systems (boiler components, turbine parts).
• Marine engineering (propeller shafts, offshore platforms).
• High-temperature industrial furnaces and heat exchangers.