ER316L is an extra-low carbon austenitic stainless steel filler metal (wire/rod) used for welding, known for excellent corrosion resistance, especially against pitting and intergranular corrosion, due to its molybdenum content and low carbon, making it ideal for chemical, petrochemical, and marine applications. It offers great weldability, good mechanical properties, and high resistance to cracking, typically containing ~18% Chromium, ~12% Nickel, and ~2-3% Molybdenum.
Key Characteristics
Composition: Primarily 18% Chromium, 12% Nickel, and 2-3% Molybdenum (Mo).
Low Carbon (L): Limits carbon to 0.03% max, preventing carbide precipitation (sensitization) and enhancing intergranular corrosion resistance.
Molybdenum Content: Provides superior resistance to pitting corrosion in chloride environments and acids (sulfuric, phosphoric).
Weldability: Offers a stable arc, good bead appearance, and excellent crack resistance due to controlled ferrite content in the weld metal.
Corrosion Resistance: Excellent resistance to general corrosion, pitting, and crevice corrosion, even at elevated temperatures.
Common Applications
Welding 316/316L stainless steels in equipment for chemical, petrochemical, fertilizer, and pulp/paper industries.
Marine environments, food processing, and pharmaceutical equipment.
Overlay applications requiring high heat and corrosion resistance.
Usage
Used in TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding processes as a filler material.
Provides radiographic quality welds with good mechanical strength and integrity
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