Stainless Steel 317 Fasteners are corrosion-resistant bolts, nuts, screws and studs manufactured from AISI 317 / UNS S31700 austenitic stainless steel. Their 3–4% molybdenum content provides enhanced resistance to pitting and crevice corrosion, making them suitable for demanding chemical, petrochemical, pulp and paper, marine and industrial applications.
Stainless Steel 317 Fasteners | High Moly 317 SS Bolts & Nuts
Stainless Steel 317 Fasteners are high-molybdenum austenitic stainless steel fasteners designed for applications requiring excellent corrosion resistance, particularly in aggressive chemical and chloride-containing environments. Manufactured from UNS S31700, these fasteners contain approximately 3–4% molybdenum, providing improved resistance to pitting and crevice corrosion compared with conventional 304 and 316 stainless steels.
We manufacture and supply SS 317 Fasteners in bolts, nuts, screws, washers, threaded rods, stud bolts, hex bolts, socket head screws, anchor fasteners and customized configurations. These 317 Stainless Steel Bolts and Nuts are available in metric and imperial sizes with different thread forms, head styles and dimensional standards to meet project requirements.
What Are Stainless Steel 317 Fasteners?
The main advantage of High Moly 317 SS Fasteners is their enhanced corrosion resistance. Stainless Steel 317 contains chromium, nickel and a higher molybdenum level than 316 stainless steel. ATI identifies UNS S31700 as an austenitic stainless steel with 18–20% chromium, 11–15% nickel and 3–4% molybdenum.
Key advantages include:
- Excellent resistance to general corrosion
- Enhanced resistance to pitting and crevice corrosion
- High molybdenum content for aggressive environments
- Good resistance to many chemical-processing media
- Good ductility and formability
- Non-magnetic or substantially non-magnetic in the annealed condition
- Good strength and toughness
- Suitable for demanding industrial fastening applications
- Available in customized dimensions and thread configurations
- Good service life where corrosion resistance is a primary consideration
Compared with 316 stainless steel, Grade 317 is often selected when additional molybdenum and corrosion resistance are desirable. The correct grade should always be selected based on the actual process medium, temperature, chloride concentration and design conditions.
Table of Contents
- ➤ Stainless Steel 317 Fasteners | High Moly 317 SS Bolts & Nuts
- ➤ What Are Stainless Steel 317 Fasteners?
- ➤ Stainless Steel 317 Fasteners Specifications
- ➤ Stainless Steel 317 Fasteners Equivalent Grades
- ➤ Stainless Steel 317 Fasteners Chemical Composition
- ➤ Mechanical Properties of Stainless Steel 317
- ➤ Types of SS 317 Fasteners We Supply
- ➤ ASTM A193 Grade 317 Fasteners – Specification Note
- ➤ Manufacturing of Stainless Steel 317 Fasteners
- ➤ Applications of 317 Stainless Steel Bolts and Nuts
- ➤ Stainless Steel 317 Fasteners vs 316 Fasteners
- ➤ Why Choose Us for Stainless Steel 317 Fasteners?
- ➤ Stainless Steel 317 Fasteners Manufacturer, Stockist & Exporter
Stainless Steel 317 Fasteners Specifications
| Property | Stainless Steel 317 |
|---|---|
| Material | Austenitic Stainless Steel |
| AISI | 317 |
| UNS | S31700 |
| Werkstoff Number | 1.4449 |
| EN Number | 1.4449 |
| JIS | SUS 317 |
| Chemical Composition | Cr-Ni-Mo Stainless Steel |
| Chromium | 18.0–20.0% |
| Nickel | 11.0–15.0% |
| Molybdenum | 3.0–4.0% |
| Carbon | 0.08% max. |
| Manganese | 2.00% max. |
| Silicon | 0.75% max. |
| Phosphorus | 0.045% max. |
| Sulfur | 0.030% max. |
| Density | Approx. 8.03 g/cm³ |
| Product Forms | Bolts, Nuts, Screws, Studs, Washers, Threaded Rods |
The chemical limits above correspond to commonly published UNS S31700 composition data.
Stainless Steel 317 Fasteners Equivalent Grades
| Standard | Equivalent / Designation |
|---|---|
| AISI | 317 |
| UNS | S31700 |
| Werkstoff Nr. | 1.4449 |
| EN | 1.4449 |
| JIS | SUS 317 |
| DIN | 1.4449 |
| INOX | 317 |
| Stainless Steel Grade | SS 317 |
Stainless Steel 317 Fasteners Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon | 0.08 max. |
| Manganese | 2.00 max. |
| Silicon | 0.75 max. |
| Phosphorus | 0.045 max. |
| Sulfur | 0.030 max. |
| Chromium | 18.0–20.0 |
| Nickel | 11.0–15.0 |
| Molybdenum | 3.0–4.0 |
| Nitrogen | 0.10 max. |
| Iron | Balance |
The exact chemical requirements should be confirmed against the applicable material specification and purchase order.
Mechanical Properties of Stainless Steel 317
| Mechanical Property | Typical / Published Value* |
|---|---|
| Tensile Strength | 515 MPa min. |
| Yield Strength | 205 MPa min. |
| Elongation | 35% min. |
| Hardness | 95 HRB max. |
| Density | 8.03 g/cm³ |
*Values should not be used as fastener design values unless confirmed against the applicable product and fastener specification.
Types of SS 317 Fasteners We Supply
We offer a wide range of SS 317 Fasteners for industrial, structural and equipment assembly applications, including:
- Stainless Steel 317 Hex Bolts
- 317 Stainless Steel Bolts and Nuts
- SS 317 Stud Bolts
- UNS S31700 Stud Bolts
- Stainless Steel 317 Hex Nuts
- SS 317 Heavy Hex Nuts
- Stainless Steel 317 Screws
- Werkstoff Nr 1.4449 Screws
- DIN 1.4449 Bolts
- SS 317 Socket Head Cap Screws
- Stainless Steel 317 Threaded Rods
- SS 317 Washers
- Stainless Steel 317 Anchor Bolts
- SS 317 U-Bolts
- SS 317 Eye Bolts
- Stainless Steel 317 Foundation Bolts
- Customized 317 SS Fasteners
Sizes, lengths, thread profiles and finishes can be supplied according to drawings, specifications and customer requirements.
ASTM F593 317 Hex Bolts – Specification Note
| Aspect | Details |
|---|---|
| Standard | ASTM F593 |
| Scope | Covers stainless steel bolts, hex cap screws, and studs |
| Size Range | 0.25 to 1.50 inches (nominal diameter) |
| Included Alloy Groups | 304, 316, 316L, 321, 347, and other specified stainless steel grades |
| 317 Grade Status | 317 is not specifically listed as a standard alloy group in ASTM F593 |
| Keyword Usage Note | "ASTM F593 317 Hex Bolts" is a market/search term and should be used with technical caution |
| Buyer Recommendation | If 317 material is required, confirm alloy selection, mechanical properties, and certification requirements with the supplier under the agreed purchase specification |
Manufacturing of Stainless Steel 317 Fasteners
Applications of 317 Stainless Steel Bolts and Nuts
The combination of chromium, nickel and molybdenum makes 317 Stainless Steel Bolts and Nuts suitable for applications where enhanced corrosion resistance is important.
Common applications include:
- Chemical processing plants
- Petrochemical equipment
- Refinery equipment
- Pulp and paper processing
- Pollution-control equipment
- Flue-gas treatment systems
- Industrial heat exchangers
- Food and process equipment
- Marine and coastal equipment
- Pharmaceutical processing equipment
- Power-generation equipment
- Industrial storage and processing systems
Material selection should be based on the specific operating environment rather than grade name alone.
Stainless Steel 317 Fasteners vs 316 Fasteners
The higher molybdenum content of Grade 317 is one of the principal reasons it is selected over 316 for certain aggressive environments.
| Feature | SS 316 | SS 317 |
|---|---|---|
| Stainless Type | Austenitic | Austenitic |
| Molybdenum | Approx. 2–3% | Approx. 3–4% |
| Corrosion Resistance | Excellent | Higher in many aggressive environments |
| Pitting Resistance | Very good | Enhanced |
| Chemical Service | Good | Very good for selected aggressive media |
| Typical Use | General industrial and marine applications | More demanding chemical and corrosive applications |
Why Choose Us for Stainless Steel 317 Fasteners?
As an experienced SS 317 Fasteners Manufacturer, we focus on material traceability, dimensional accuracy and customer-specific requirements. We supply fasteners for industrial applications in different sizes, lengths, thread forms and configurations.
Our capabilities include:
- Genuine UNS S31700 material
- Customized sizes and dimensions
- Metric and imperial threads
- Different head and nut configurations
- Material traceability
- Inspection documentation
- Third-party inspection support
- Export-quality packaging
- Domestic and international supply
- Bulk and project-based orders
Whether you require UNS S31700 Fasteners, UNS S31700 Stud Bolts, DIN 1.4449 Bolts, Werkstoff Nr 1.4449 Screws or JIS SUS 317 Fasteners, we can help identify the appropriate product specification for your application.
Stainless Steel 317 Fasteners Manufacturer, Stockist & Exporter
We supply Stainless Steel 317 Fasteners to customers requiring corrosion-resistant bolting solutions for demanding industrial environments. As an SS 317 Stud Bolt Stockist and Stainless Steel 317 Fasteners Exporter, we can support both standard and customized requirements.
Our product range covers bolts, nuts, screws, studs, threaded rods, washers and specialty fasteners manufactured according to agreed dimensional and material specifications.
For your next requirement, send us the grade, size, quantity, thread specification, applicable standard and delivery destination. We can provide a technical and commercial quotation based on your project requirements.
Related Stainless Steel Fasteners
We also supply:
- Stainless Steel 304 fasteners
- Stainless Steel 304l Fasteners
- Stainless Steel 304H Fasteners
- Stainless Steel 309 Fasteners
- Stainless Steel 309S Fasteners
- Stainless Steel 309H Fasteners
- Stainless Steel 310 Fasteners
- Stainless Steel 310S Fasteners
- Stainless Steel 310H Fasteners
- Stainless Steel 316 Fasteners
- Stainless Steel 316L Fasteners
- Stainless Steel 316H Fasteners
- Stainless Steel 316TI Fasteners
- Stainless Steel 317 Fasteners
- Stainless Steel 317L Fasteners
- Stainless Steel 321 Fasteners
- Stainless Steel 321H Fasteners
- Stainless Steel 347 Fasteners
- Stainless Steel 347H Fasteners
- Stainless Steel 410 Fasteners
- Stainless Steel 446 Fasteners
- Stainless Steel 904L Fasteners
Order SS 317 Fasteners From Us
Need UNS S31700 Fasteners, UNS S31700 Stud Bolts, 317 bolts and nuts, screws, washers, or customized fasteners?
We can help you select and supply the appropriate Stainless Steel 317 Fasteners based on size, quantity, thread type, application, material requirement, applicable standard, and inspection requirements.
Send us your drawing, size list, technical specification, or inquiry to receive a product-specific quotation.
Frequently Asked Questions
Request Your Stainless Steel 317 Fasteners Quote Today!
