317L Stainless Steel
Stainless Steel 317L is a low-carbon variant of the 317 austenitic stainless steel, engineered to provide enhanced weldability and improved resistance to intergranular corrosion after welding or heat treatment. This alloy retains the core advantages of 317 while addressing the potential carbide precipitation issues associated with higher carbon content, making it ideal for applications requiring post-weld corrosion resistance.
Stainless Steel 317L combines the superior corrosion resistance of 317 with enhanced weldability and intergranular corrosion resistance, making it a premier choice for welded structures in aggressive environments across chemical, oil and gas, pharmaceutical, and marine industries.
Chemical Composition
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
|
|
Min |
- |
- |
- |
- |
- |
18 |
11 |
3 |
|
Max |
0.03 |
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% |
|
8 |
1390~1440 |
486 |
170 |
40% |
Feature
317L is the low-carbon variant (C≤0.03%) of 317 stainless steel, which retains the high molybdenum content (3%-4%) while enhancing resistance to intergranular corrosion. The low-carbon design minimizes sensitization after welding, and the material maintains excellent cold workability and formability. Like other austenitic grades, it is non-magnetic in solution-annealed condition.
Applications
Core Chemical Equipment: Sulfuric/phosphoric acid production units, bleaching systems
Environmental Engineering: Flue gas desulfurization towers, wastewater treatment systems
Severe Marine Corrosion Applications: Submarine cable sheaths, critical components for deep-sea platforms
Energy Sector: Coal-fired power plant denitrification equipment, chemical plant heat exchangers
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