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Stainless Steel 317 | Product Overview
Introduction To Austenitic Stainless Steel 317
MOKSH TUBES & FITTINGS LLP is a trusted manufacturer, supplier, exporter, importer, and stockist of Austenitic Stainless Steel 317 products such as pipes & tubes, sheets, plates, bars, and fittings.
Austenitic Stainless Steel 317, is an austenitic stainless steel with high molybdenum content, offering enhanced corrosion resistance, especially in severe environments containing chlorides and acids. It is widely used where higher corrosion resistance than 316 is needed. This alloy also exhibits good strength and excellent resistance to pitting and crevice corrosion, making it ideal for chemical processing, pollution control, and marine applications.
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Technical Specifications – Stainless Steel 317 (UNS S31700 / EN 1.4438)
| Category | Details |
|---|---|
| Material | Austenitic Stainless Steel 317 |
| UNS No. | S31700 |
| EN / DIN | 1.4438 |
| Alloy Type | High-Molybdenum Austenitic SS |
| Chromium | 18 – 20 % |
| Nickel | 11 – 15 % |
| Molybdenum | 3 – 4 % |
| Magnetic Properties | Non-Magnetic |
| Heat Treatable | ❌ No |
| Strengthening Method | Cold Working |
| Pitting / Crevice Resistance | Excellent |
| Acid Resistance | Very Good |
| Typical Use | Chemical & Marine Environments |
Chemical Composition of Stainless Steel 317
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.04 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 11.0 – 15.0 |
| Molybdenum (Mo) | 3.0 – 4.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Nitrogen (N) | ≤ 0.10 |
Mechanical Properties of Stainless Steel 317 (Annealed)
| Property | Annealed | Cold-Drawn | Sheet |
|---|---|---|---|
| Tensile Strength | 520 – 655 MPa | 585 – 795 MPa | 550 – 725 MPa |
| Yield Strength (0.2%) | 240 – 380 MPa | 345 – 550 MPa | 275 – 480 MPa |
| Elongation | 35 – 55 % | 20 – 40 % | 30 – 50 % |
| Brinell Hardness | 140 – 190 | 180 – 230 | 150 – 210 |
| Rockwell Hardness | 85 – 95 B | 95 – 105 B | 90 – 100 B |
Uses and Advantages
Higher molybdenum content provides superior resistance to pitting and crevice corrosion
Excellent resistance to strong acids and chloride environments
Good strength and toughness
Suitable for use in high-temperature applications
Good weldability and corrosion resistance post-welding
Applications of Austenitic Stainless Steel 317
Austenitic Stainless Steel 317 is used in environments requiring superior corrosion resistance and mechanical properties, including:
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ's
What is Austenitic Stainless Steel 317 and how is it different from 316 stainless steel?
Austenitic Stainless Steel 317 is a molybdenum-rich stainless steel that offers greater corrosion resistance than SS 316, especially in environments containing chlorides, acids, and aggressive chemicals. With 3–4% molybdenum content, SS 317 provides superior resistance to pitting and crevice corrosion, making it ideal for chemical processing, pollution control, and marine applications.
What are the key properties of Stainless Steel 317?
SS 317 offers:
- Enhanced resistance to chlorides, sulfuric acid, phosphoric acid, and acidic environments.
- Superior protection against pitting and crevice corrosion compared to SS 316.
- High mechanical strength and toughness at both ambient and elevated temperatures.
- Excellent weldability and formability.
- Good resistance after welding due to controlled carbon content.
Where is Stainless Steel 317 commonly used?
SS 317 is widely used in:
- Chemical processing plants (tanks, reactors, heat exchangers).
- Pollution control equipment (scrubbers, flue gas stacks).
- Marine and offshore industries (seawater-exposed components).
- Food and beverage processing (handling acidic foods and cleaning chemicals).
- Pharmaceutical industry (corrosion-resistant processing equipment).
Why is Stainless Steel 317 preferred over 316 in aggressive environments?
Stainless Steel 317 has a higher molybdenum content (3–4%) compared to 316, which significantly improves its resistance to localized corrosion like pitting and crevice attack. This makes SS 317 the preferred choice for severe chemical, marine, and acidic service conditions where SS 316 may not provide adequate durability.
Who is a reliable supplier of Stainless Steel 317 in India?
Moksh Tubes & Fittings LLP is a trusted manufacturer, supplier, exporter, importer, and stockist of Stainless Steel 317 products. They supply pipes, tubes, sheets, plates, bars, flanges, fittings, and fasteners manufactured to international quality standards. With competitive pricing, global supply reliability, and expert technical support, Moksh Tubes & Fittings LLP is a preferred partner for industries worldwide.
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For detailed product information or to request a quote on Austenitic Stainless Steel 317, contact Moksh Tubes & Fittings LLP — your dependable partner for stainless steel solutions. Get in Touch