317 Stainless Steel Flange Supplier: 317, 317L
317L is a low-carbon version of 317, with carbon content limited to 0.03% or less.
Chemical Composition of 317 Stainless Steel Flange (317/L)
| Element | C | Cr | Ni | Mo | Mn | Si | P | S | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 317 | ≤ 0.08% | 18.0% – 20.0% | 11.0% – 15.0% | 3.0% – 4.0% | ≤ 2.0% | ≤ 1.0% | ≤ 0.045% | ≤ 0.03% | ≤ 0.10% | Balance |
| 317L | ≤ 0.03% | 18.0% – 20.0% | 11.0% – 15.0% | 3.0% – 4.0% | ≤ 2.0% | ≤ 1.0% | ≤ 0.045% | ≤ 0.03% | ≤ 0.10% | Balance |
Analysis of Ingredient Characteristics
Grade 317L has a higher molybdenum content than Grade 316,significantly enhancing the flange’s resistance to pitting corrosion in chloride-containing environments and reducing acids.
Low-carbon Version (317L):
Reducing the carbon content to below 0.03% prevents the formation of chromium carbide precipitates during welding,thereby avoiding intergranular corrosion in the heat-affected zone.
High Nickel And Chromium:
These ensure a stable austenitic structure and provide excellent overall oxidation resistance.
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Mechanical Properties of 317 Stainless Steel Flange Series
| Performance Metrics | 317 | 317L |
|---|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) | ≥ 515 MPa (75 ksi) |
| Yield Strength 0.2% | ≥ 205 MPa (30 ksi) | ≥ 205 MPa (30 ksi) |
| Elongation in 50mm | ≥ 35% | ≥ 35% |
| Hardness | ≤ 217 HBW(95 HRB) | ≤ 217 HBW(95 HRB) |
Minor Differences in Practical Application
4 Manufacturing Methods for 317 Stainless Steel Flange
Forging
Centrifugal Casting
Plate Cutting
Ring Rolling
Applications of 317 Stainless Steel Flange (317/L)
317 Stainless Steel Flange
- Pulp and Paper Manufacturing
- Chemical Processing
- Textile Dyeing Equipment
- Food Processing
- High-Temperature Condensers
317L Stainless Steel Flange
- Flue Gas Desulfurization
- Marine and Desalination Plants
- Pharmaceutical Industry
- Petrochemical and Refining
- Explosives Manufacturing
FAQs About 317 Stainless Steel Flange Grades
This is because it contains a higher percentage of molybdenum.While 316L contains 2%–3% molybdenum,317L contains 3%–4%. 317L offers better resistance to pitting and crevice corrosion when exposed to chloride-containing solutions or strongly reducing acids.
Generally,you can substitute 317L for 317 because 317L offers better corrosion resistance and is easier to weld.If the design drawings specify 317L,you should not substitute 317 without careful consideration;unless the welded joint undergoes an expensive post-weld annealing process,it may fail prematurely.
Of course,you can also use flanges that are rated for both 317 and 317L.As a supplier with over a decade of experience in stainless steel products,Kaysuns can provide you with such flanges.Please feel free to contact us at any time.
Although 317L offers excellent creep resistance at high temperatures,it does have its limitations.Prolonged exposure to temperatures between 427°C and 816°C may cause metal embrittlement (formation of the σ phase).If your operating conditions consistently exceed 450°C,we recommend consulting a materials engineer to determine whether you need to upgrade to a higher-grade alloy or a nickel-based alloy.
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- +86 577 8551 1171
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- https://www.kaysuns.com/
