Stainless Steel 317L is a low-carbon austenitic stainless steel containing molybdenum for enhanced corrosion resistance. UNS S31703 fasteners are used in chemical processing, petrochemical, marine, pollution-control, and other aggressive environments where resistance to pitting and chemical attack is important.
Stainless Steel 317L Fasteners Manufacturer, Supplier & Exporter
Stainless Steel 317L Fasteners are low-carbon, molybdenum-bearing stainless steel fasteners designed for applications requiring excellent resistance to corrosion, pitting, crevice corrosion, and chemical environments. Compared with conventional austenitic stainless steels, 317L offers higher molybdenum content, making it particularly suitable for aggressive process environments containing chlorides, acids, and other corrosive media.
We supply SS 317L Fasteners in different sizes, thread configurations, dimensions, and finishes for demanding industrial applications. Our range includes 317L Stainless Steel Bolts and Nuts, stud bolts, hex bolts, heavy hex bolts, U bolts, anchor bolts, washers, and custom fasteners manufactured according to applicable international specifications.
What Are Stainless Steel 317L Fasteners?
Stainless Steel 317L Fasteners are manufactured from UNS S31703 stainless steel, a low-carbon version of Type 317 stainless steel. The addition of molybdenum improves resistance to localized corrosion, while the low carbon content helps reduce the risk of chromium carbide precipitation during welding.
The grade is also identified as AISI 317L, INOX 317L, JIS SUS 317L, and Werkstoff No. 1.4438 / DIN 1.4438 in different international material designation systems.
317L Stainless Steel Bolts and Nuts are commonly selected where standard 304L or 316L stainless steel fasteners may not provide sufficient corrosion resistance.
Table of Contents
- ➤ Stainless Steel 317L Fasteners Manufacturer, Supplier & Exporter
- ➤ What Are Stainless Steel 317L Fasteners?
- ➤ Key Features of SS 317L Fasteners
- ➤ Types of Stainless Steel 317L Fasteners
- ➤ SS 317L Fasteners Specifications
- ➤ Chemical Composition of UNS S31703
- ➤ Mechanical Properties of 317L Stainless Steel Fasteners
- ➤ 317L Stainless Steel Fasteners Equivalent Grades
- ➤ ASTM A193 317L Fasteners and Other Standards
- ➤ Manufacturing & Quality Inspection of 317L Fasteners
- ➤ Applications of Stainless Steel 317L Fasteners
- ➤ Stainless Steel 317L Fasteners Supplier, Exporter & Stockist
Key Features of SS 317L Fasteners
- Excellent resistance to general corrosion
- Higher molybdenum content than 316L stainless steel
- Improved resistance to pitting and crevice corrosion
- Low carbon composition for improved weldability
- Good resistance to many acidic and chemical environments
- Good toughness and ductility
- Suitable for demanding industrial service
- Available in standard and customized dimensions
- Can be supplied with different surface finishes and thread forms
- Suitable for fabrication, piping, equipment, and structural applications
Types of Stainless Steel 317L Fasteners
We manufacture and supply a broad range of UNS S31703 Fasteners for industrial applications.
➤ UNS S31703 Stud Bolts
UNS S31703 Stud Bolts are threaded rods used with nuts for connecting flanges, pressure-containing components, piping systems, and industrial equipment. They can be supplied in full-thread or reduced-thread configurations according to application requirements.
➤ UNS S31703 Hex Bolts
UNS S31703 Hex Bolts feature a six-sided head for installation with standard tools. They are used for machinery, structural assemblies, equipment, piping supports, and general industrial connections.
➤ SS 317L Heavy Hex Bolts
SS 317L Heavy Hex Bolts provide a larger bearing surface and heavier head configuration than standard hex bolts. They are commonly selected for industrial flange and heavy-duty bolting applications.
➤ 317L Stainless Steel Bolts and Nuts
Matched 317L Stainless Steel Bolts and Nuts provide corrosion-resistant threaded connections for equipment operating in demanding environments. Nut and bolt material combinations should be selected carefully to meet the required mechanical and corrosion-resistance specifications.
➤ SS 317L U Bolts & Anchor Bolts
SS 317L U Bolts & Anchor Bolts are available for pipe supports, equipment mounting, structural connections, and foundation applications. Custom lengths, thread lengths, bends, and dimensions can also be produced.
SS 317L Fasteners Specifications
| Property | Specification |
|---|---|
| Material | Stainless Steel 317L |
| UNS | S31703 |
| EN / Werkstoff No. | 1.4438 |
| DIN | 1.4438 |
| AISI | 317L |
| JIS | SUS 317L |
| Material Type | Austenitic Stainless Steel |
| Carbon | Low Carbon |
| Product Forms | Bolts, Nuts, Studs, Screws, Washers, U Bolts, Anchor Bolts |
| Threads | Metric, UNC, UNF, BSW, BSF and Custom |
| Standards | ASTM, ASME, DIN, ISO, JIS and customer specifications |
| Surface | Plain, Pickled, Passivated, Polished or Custom |
| Manufacturing | Cold Formed, Hot Forged or Machined |
The applicable product standard and grade designation should be confirmed against the purchaser's drawing, specification, and order requirements.
Chemical Composition of UNS S31703
| Element | Typical / Specified Maximum, % |
|---|---|
| Carbon (C) | 0.03 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 18.00–20.00 |
| Nickel (Ni) | 11.00–15.00 |
| Molybdenum (Mo) | 3.00–4.00 |
| Iron (Fe) | Balance |
The exact chemistry can vary according to the applicable material specification and product form. Mill test certificates can be provided when required.
Mechanical Properties of 317L Stainless Steel Fasteners
| Property | Typical Value / Requirement |
|---|---|
| Tensile Strength | Application/specification dependent |
| Yield Strength | Application/specification dependent |
| Elongation | Application/specification dependent |
| Hardness | Application/specification dependent |
| Material Structure | Austenitic |
| Corrosion Resistance | Excellent |
| Magnetic Response | Generally low in annealed condition |
For critical applications, we recommend specifying the required fastener standard and mechanical class when requesting a quotation.
317L Stainless Steel Fasteners Equivalent Grades
| Standard | 317L Equivalent |
|---|---|
| UNS | S31703 |
| WNR / Werkstoff No. | 1.4438 |
| EN | X2CrNiMo18-15-4 |
| JIS | SUS 317L |
| AISI | 317L |
| INOX | 317L |
| ASTM | 317L |
The grade is commonly identified internationally as UNS S31703, making UNS S31703 Fasteners suitable for projects that specify this material designation.
ASTM A193 317L Fasteners and Other Standards
For industrial and pressure-related applications, ASTM A193 317L Fasteners and ASME SA193 SS 317L Studs may be specified where the applicable standard and grade requirements are met.
Depending on the product and application, we can supply fasteners manufactured or supplied to requirements such as:
- ASTM A193 / ASME SA193 – alloy and stainless steel bolting for high-temperature or high-pressure service
- ASTM F593 – stainless steel bolts, screws, studs, and other externally threaded fasteners
- ASTM A182 – forged or rolled alloy and stainless steel flanges, fittings, valves, and related components where applicable
- ASTM A194 / ASME SA194 – nuts for pressure, high-temperature, and high-pressure service
- DIN standards – dimensional and product requirements
- JIS SUS 317L Fasteners – Japanese designation
- Customer-specific drawings and specifications
ASTM F593 317L Bolts, ASTM A182 UNS S31703 Bolts, and other designations should be confirmed against the exact product form and purchasing specification before ordering.
Manufacturing & Quality Inspection of 317L Fasteners
Applications of Stainless Steel 317L Fasteners
Stainless Steel 317L Fasteners are used in industries and equipment such as:
- Chemical processing plants
- Petrochemical plants
- Oil and gas equipment
- Pulp and paper processing
- Pharmaceutical equipment
- Food and process equipment
- Marine and coastal installations
- Pollution-control equipment
- Flue-gas treatment systems
- Heat exchangers
- Industrial piping systems
- Storage tanks and pressure equipment
- Water and wastewater treatment equipment
Their selection should always consider the actual process chemistry, temperature, chloride concentration, loading conditions, and applicable design code.
Stainless Steel 317L Fasteners Supplier, Exporter & Stockist
As a 317L Stainless Steel Fasteners Supplier, we provide fasteners in standard as well as customized sizes for domestic and international requirements. We also operate as a Stainless Steel 317L Fasteners Exporter, supplying material for industrial projects and OEM requirements.
Our stock and supply range includes SS 317L Stud Bolt Stockist requirements, SS 317L Heavy Hex Bolts, hex bolts, nuts, washers, U bolts, anchor bolts, screws, and other customized fasteners.
Fasteners can be supplied with relevant documentation such as material test certificates, dimensional inspection reports, PMI reports, and other quality documents where specified.
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
Request a Quote for SS 317L Fasteners
Looking for SS 317L Fasteners for a new project, maintenance requirement, OEM application, or industrial installation? Share the required fastener type, diameter, length, thread specification, quantity, material standard, and certification requirements with us.
We can assist with the selection and supply of UNS S31703 Fasteners, UNS S31703 Stud Bolts, UNS S31703 Hex Bolts, WNR 1.4438 Fasteners, DIN 1.4438 Bolts, INOX 317L Bolts, JIS SUS 317L Fasteners, and customized 317L fastener solutions.
Contact us today for pricing, availability, technical specifications, and delivery details.
Frequently Asked Questions
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