Compared to alloy 316L, alloy 317L has a higher nickel alloy concentration and is an austenitic stainless steel with low carbon and high molybdenum. This alloy was created to withstand the attack of compounds that contain sulfuric acid, and it combines outstanding corrosion resistance with great mechanical qualities and ease of manufacture. In fossil fuel power plants, these alloys are frequently utilized for flue gas desulfurization services. 317L stainless steel plate has greater creep strength, stress to rupture, and tensile strength at high temperatures when compared to other austenitic stainless steel.
Compared to stainless steel grades like 304 or 316, 317L has better corrosion resistance because of its higher molybdenum and chromium content. It also resists pitting and crevice corrosion caused by chloride and is resistant to phosphoric acid, sulfuric acid, and these acids. This grade of 317’s low carbon content also confers resistance to sensitization during welding, enabling it to preserve its grain boundary corrosion resistance and avoid intergranular stress corrosion cracking. Although 317L cannot be heat-treated to harden, it can be cold-worked.
Chemical composition
- C – 0.035 max
- Mn – 2.0 max
- Si – 1.0 max
- P – 0.045 max
- S – 0.030 max
- Cr – 18.00 – 20.00
- Mo – 3.00 – 4.00
- Ni – 11.00 – 15.00
- Fe – 57.89 min
Mechanical properties
- Density – 7.9 g/cm3
- Melting Point – 1400 °C (2550 °F)
- Tensile Strength – Psi – 75000 , MPa – 515
- Yield Strength (0.2%Offset) – Psi – 30000 , MPa – 205
- Elongation – 35 %
Common applications
- Systems for flue gas desulfurization in air pollution control (FGD).
- Processing using chemicals and petrochemicals.
- Explosives.
- Processing of food and beverages.
- Refining of petroleum.
- Condensers – used in energy production.
- Paper and pulp.
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