
317 Stainless Steel
Stainless Steel 317 is a molybdenum-containing austenitic stainless steel that offers enhanced corrosion resistance compared to the more common 304 and 316 grades. This alloy is particularly valued for its superior performance in aggressive environments, making it a preferred choice in various industrial applications where corrosion resistance is paramount.
One of the key advantages of Stainless Steel 317 is its outstanding corrosion resistance. It performs exceptionally well in a wide range of corrosive media, including sulfuric acid, acetic acid, and other organic acids. Its resistance to chloride-induced corrosion makes it suitable for applications in marine environments, chemical processing plants, and coastal infrastructure. The alloy also shows good resistance to oxidation at elevated temperatures, up to approximately 870°C (1600°F), making it useful in high-temperature applications such as heat exchangers and furnace components.
Chemical Composition
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
|
|
Min |
- |
- |
- |
- |
- |
18 |
11 |
3 |
|
Max |
0.08 |
1 |
2 |
0.045 |
0.03 |
20 |
15 |
4 |
Material Properties
|
Density |
Melting Point |
Minimum Mechanical Properties at Room Temperature |
||
|
Tensile Strength |
Yield Strength |
Elongation |
||
|
g/cm3 |
℃ |
Rm N/mm2 |
Rp0.2 N/mm2 |
A5% |
|
7.89 |
1400~1440 |
515 |
205 |
40% |
Feature
The high molybdenum content endows it with exceptional resistance to pitting and crevice corrosion.317 stainless steel demonstrates outstanding performance in reducing media such as sulfuric and phosphoric acids, with significantly superior chloride corrosion resistance compared to 316. It offers good machinability and weldability, and remains non-magnetic in solution-annealed condition.
Applications
Critical Chemical Equipment: Strong acid (sulfuric/phosphoric acid) reactors, bleaching systems
Severe Marine Corrosion: Submarine cable sheaths, desalination plant core components
Energy & Environmental Protection: Flue gas scrubbers, waste incinerator linings
Specialized Fields: Pulp production equipment, nuclear waste containment vessels

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