317L stainless steel is a molybdenum-bearing, low-carbon austenitic stainless steel designed for superior corrosion resistance, especially in harsh environments. It is an enhanced version of 316L stainless steel, offering better performance in aggressive chemical and high-temperature applications. Below are its key advantages:
Superior to 316L: Due to higher molybdenum (3-4%) and nickel (11-15%) content, 317L resists pitting, crevice corrosion, and stress corrosion cracking (SCC) better than 316L.
Resistant to Sulfuric Acid & Chlorides: Performs well in acidic, chloride-rich environments (e.g., chemical processing, marine applications).
Low Carbon Content (≤0.03%): Reduces carbide precipitation (sensitization) in welding, maintaining corrosion resistance.
Good Oxidation Resistance: Maintains stability at elevated temperatures (up to ~870°C / 1600°F), making it suitable for heat exchangers and furnace parts.
Less Thermal Expansion: Compared to standard austenitic steels, it has better thermal fatigue resistance.
Easy to Weld: Low carbon content minimizes carbide precipitation, reducing the risk of weld decay.
Formability & Ductility: Can be machined, formed, and deep-drawn (though harder than 304/316 due to higher molybdenum).
Chemical & Petrochemical Industry: Reactors, pipes, and valves handling sulfuric, phosphoric, and acetic acids.
Pollution Control Systems: Flue gas desulfurization (FGD) units in power plants.
Marine & Offshore: Components exposed to seawater and salt spray.
Pharmaceutical & Food Processing: Where high corrosion resistance and hygiene are critical.
While more expensive than 304 or 316 stainless steel, 317L offers longer service life in corrosive settings, reducing maintenance and replacement costs.
| Property | 317L | 316L |
|---|---|---|
| Molybdenum (%) | 3-4% | 2-3% |
| Nickel (%) | 11-15% | 10-13% |
| Corrosion Resistance | Higher (better in chlorides & acids) | Good, but weaker in harsh conditions |
| High-Temp Performance | Better oxidation resistance | Moderate |
| Cost | Higher | Lower |
317L stainless steel is ideal for highly corrosive and high-temperature environments where standard austenitic steels (e.g., 304, 316) fail. Its enhanced molybdenum and nickel content make it a top choice for chemical processing, marine, and energy industries.
Cherry
Website: www.jinyoumetal.com
Email: Cherry@jinyoumetal.com
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