318LN (1.4462) is a duplex stainless steel known for its excellent mechanical properties and corrosion resistance. It combines the properties of austenitic and ferritic stainless steels, making it suitable for a wide range of structural applications. The following is an overview of its features, benefits, and typical applications:

Material composition: – Contains approximately 21-23% chromium, 4.5-6.5% nickel and approximately 2.5-3.5% molybdenum.
– Balanced primarily with iron, along with performance-enhancing trace elements.

Corrosion Resistance: – Excellent resistance to pitting and crevice corrosion, especially in chloride environments.
– Good resistance to stress corrosion cracking, making it suitable for harsh environments.

Mechanical Properties: – High tensile strength (approx. 800-1000 MPa) and yield strength (approx. 450-600 MPa).
– Good plasticity and toughness ensure performance under various loading conditions.

Fabrication and weldability: – Can be easily manufactured using standard techniques including cutting, bending and welding.
– Specific welding procedures are required to maintain corrosion resistance and mechanical integrity.

– High strength: Duplex structure provides superior strength compared to standard austenitic stainless steels.
– Corrosion Resistance: Enhanced resistance to a variety of corrosive environments, making it ideal for challenging applications.
– Cost-effective: good balance between performance and cost compared to high-nickel austenitic steel grades.

Marine Applications: – Offshore structures: for platforms, pipes and equipment exposed to seawater.
– Shipbuilding: ideal for parts requiring high strength and corrosion resistance.

Chemical Processing: – Tanks and Containers: Suitable for handling corrosive chemicals and corrosive substances.
– Piping system: pipelines used to transport corrosive fluids.

Oil and Gas Industry: – Drilling equipment: used for parts exposed to harsh environments, such as drilling machines.
– Refinery: suitable for heat exchangers, reactors and other equipment.

Building and Construction: – Structural frames: used in buildings and bridges where corrosion resistance and strength are critical.
– Handrails and railings: ideal for aesthetic and functional applications in public spaces.

Food and Beverage Industry: – Processing equipment: for equipment requiring high hygiene standards and corrosion resistance.

Generation: – Heat exchangers: components used in power plants exposed to harsh environments.

318LN / 1.4462 Duplex stainless steel structural profiles offer the perfect combination of strength, corrosion resistance and versatility. Suitable for a wide range of applications in the marine, chemical, oil and gas, construction and food processing industries, they provide reliable performance in challenging environments. Proper fabrication and welding techniques are essential to maximize their benefits.