At Amardeep Steel Center, we have established ourselves as a premier manufacturer, exporter, and supplier of high-integrity Stainless Steel 317 Buttweld Fittings. With a legacy of precision engineering and a commitment to unparalleled quality, we deliver robust piping solutions designed to perform in the most demanding industrial environments. Our inventory of ASTM A403 WP317 fittings is trusted by clients worldwide for its superior corrosion resistance, durability, and perfect weldability, making us the go-to source for critical applications.
We combine advanced manufacturing technology with a vast stock to ensure you receive certified, dimensionally accurate fittings right when you need them.
What Are Stainless Steel 317 Buttweld Fittings?
Stainless Steel 317 Buttweld Fittings are essential components used to connect, divert, or branch piping systems through a process of butt welding. The designation "317" refers to a superior grade of molybdenum-bearing austenitic stainless steel, specifically UNS S31700. As a more robust alternative to the common 316 grade, 317 pipe fittings contain a higher percentage of molybdenum (3-4%), which significantly enhances their general and localized corrosion resistance.
These fittings are manufactured under the ASTM A403 WP317 specification, which governs wrought austenitic stainless steel fittings for pressure piping applications. The standard ensures that every fitting, whether it's an elbow, tee, reducer, or cap, possesses the required chemical and mechanical properties for safe and reliable service. SS 317 Buttweld Fittings are particularly valued for their exceptional performance in environments rich in chlorides, sulfuric acid, and other aggressive chemicals, making them indispensable in industries where standard stainless steels would fail. Their design allows for a strong, leak-proof, and continuous connection that maintains the structural integrity of the entire pipeline.
Table of Contents
- Stainless Steel 317 Buttweld Fittings Specifications
- Chemical Composition & Mechanical Properties of Stainless Steel 317 Buttweld Fittings
- Mechanical Properties of Stainless Steel 317 Buttweld Fittings
- Heat Treatment & Tolerances of Stainless Steel 317 Buttweld Fittings
- Dimensional Tolerances
- Types & Forms of Stainless Steel 317 Buttweld Fittings
- Applications & Industries Served of Stainless Steel 317 Buttweld Fittings
- Why Choose Amardeep Steel for Stainless Steel 317 Buttweld Fittings?
- Related Products
- Get a Competitive Price
Stainless Steel 317 Buttweld Fittings Specifications
Our ASME B16.9 SS 317 fittings are produced in strict compliance with international standards to guarantee interchangeability, safety, and long-term performance.
|
Specification |
Details |
|---|---|
|
Specifications |
ASTM A403 / ASME SA403 |
|
Grade |
WP317 (UNS S31700) |
|
Dimensions |
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS-SP-79 |
|
Size Range |
1/2" NB to 48" NB |
|
Type |
Seamless / Welded / Fabricated |
|
Wall Thickness |
Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
|
Bending Radius |
R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
|
Testing |
100% Radiography Tested (for Welded Fittings) |
Chemical Composition & Mechanical Properties of Stainless Steel 317 Buttweld Fittings
The specific chemical balance and mechanical strength of UNS S31700 butt weld fittings are what give them their signature performance characteristics.
Chemical Composition (wt %)
|
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
Fe |
|---|---|---|---|---|---|---|---|---|---|
|
SS 317 (UNS S31700) |
0.08 max |
2.0 max |
1.0 max |
0.045 max |
0.030 max |
18.0 - 20.0 |
3.0 - 4.0 |
11.0 - 15.0 |
Balance |
Mechanical Properties of Stainless Steel 317 Buttweld Fittings
|
Property |
Value |
|---|---|
|
Tensile Strength |
515 MPa (75,000 psi) |
|
Yield Strength (0.2% Offset) |
205 MPa (30,000 psi) |
|
Elongation |
35% |
|
Density |
7.9 g/cm³ |
|
Melting Point |
1400 °C (2550 °F) |
Heat Treatment & Tolerances of Stainless Steel 317 Buttweld Fittings
To ensure maximum corrosion resistance and structural integrity, our fittings undergo precise thermal processing and adhere to strict dimensional tolerances.
Heat Treatment Requirements
All our ASTM A403 WP317 fittings are supplied in a solution-annealed condition. This heat treatment involves heating the fittings to a minimum temperature of 1040°C (1900°F), followed by rapid quenching in water or another suitable medium. This process dissolves any chromium carbides that may have formed and restores the material's austenitic structure, maximizing its corrosion resistance and ductility for reliable service.
Dimensional Tolerances
Every 317 BW Fitting we manufacture conforms to the dimensional tolerances outlined in ASME B16.9. This standard governs the center-to-face dimensions, alignment, and overall geometry of the fittings. Adherence to these tolerances is critical to ensure proper fit-up, alignment, and ease of welding during on-site installation, saving valuable time and resources.
Types & Forms of Stainless Steel 317 Buttweld Fittings
Amardeep Steel Center offers a comprehensive range of SS 317 pipe fittings to meet any piping configuration needs.
- SS 317 90° Elbow (Long & Short Radius): Used to change the direction of a pipeline by 90 degrees.
- SS 317 45° Elbow: Provides a 45-degree change in flow direction.
- SS 317 Equal Tee: Creates a 90-degree branch from the main run of pipe, with the branch being the same diameter.
- SS 317 Reducing Tee: Creates a 90-degree branch of a smaller diameter than the main pipe run.
- SS 317 Concentric Reducer: Joins pipes of different diameters along a common centerline, ideal for vertical pipe runs.
- SS 317 Eccentric Reducer: Connects pipes of different diameters with an offset centerline, preventing air or vapor pockets in horizontal pipelines.
- SS 317 End Cap: Used to seal the end of a pipe, terminating the flow.
- SS 317 Stub End (Lap Joint): Used with a lap joint flange, allowing for easy disassembly of the flanged connection.
- SS 317 Cross: A four-way fitting that connects four pipes at a common intersection.
- SS 317 Pipe Bends: Custom-fabricated bends with radii like 3D, 5D, and 10D for gradual directional changes.
Applications & Industries Served of Stainless Steel 317 Buttweld Fittings
- Chemical Processing: For handling highly corrosive substances like sulfuric acid, acetic acid, and acidic chlorides.
- Pulp and Paper Industry: To resist corrosion from bleaching chemicals and processing liquors.
- Oil and Gas: In pipelines and processing equipment exposed to sour gas (H₂S) and chloride-rich environments.
- Power Generation: Widely used in Flue-Gas Desulfurization (FGD) systems to handle corrosive scrubber slurries.
- Marine & Shipbuilding: For seawater piping systems where resistance to pitting and crevice corrosion is crucial.
- Pharmaceutical & Food Processing: In applications requiring high purity and resistance to corrosion from cleaning agents and product streams.
- Textile Industry: For equipment that comes into contact with corrosive dyes and chemicals.
Why Choose Amardeep Steel for Stainless Steel 317 Buttweld Fittings?
- Manufacturing Excellence: Our in-house production facilities ensure complete control over the manufacturing process, from raw material inspection to the final finishing of 317 BW Fittings. This guarantees consistent wall thickness, superior surface finish, and adherence to all specifications.
- Global Exports: We are a trusted exporter serving a diverse clientele in the USA, Canada, UAE, Saudi Arabia, Europe, and Southeast Asia. Our understanding of international standards and logistics ensures a seamless procurement experience.
- Fast Turnaround: We maintain a massive inventory of standard Stainless Steel 317 Buttweld Fittings ready for immediate dispatch. We can provide standard lengths or custom-cut sizes to meet your project timelines.
- Certified Quality: As an ISO 9001:2015 certified company, we stand by our quality. All fittings are supplied with an EN 10204 3.1 Material Test Certificate (MTC). We also facilitate third-party inspections from agencies like TUV, DNV, and Lloyd’s upon request.
- Technical Support: Our team of expert metallurgists is available 24/7 to provide technical guidance. Whether you need help with material selection, application design, or installation, we are here to support you.
Related Products
- 317L Pipe Fittings
- Stainless Steel 317 Forged Fittings
- Stainless Steel 317L Forged Fittings
- Stainless Steel 317L Buttweld Fittings
Get Your Stainless Steel 317 Buttweld Fittings Price
Ready to order your Stainless Steel 317 Buttweld Fittings? Contact Amardeep Steel Center today for a competitive, no-obligation quote. Our sales team will provide you with a detailed price and delivery schedule tailored to your requirements.
Frequently Asked Questions (FAQ's)
1. What is the difference between SS 317 and SS 317L buttweld fittings?
The primary difference is the carbon content. SS 317L has a lower carbon content (0.035% max) compared to SS 317 (0.08% max). This lower carbon level minimizes carbide precipitation during welding, making 317L fittings the preferred choice for welded structures to avoid intergranular corrosion.
2. Are your ASTM A403 WP317 fittings seamless or welded?
We supply both. Seamless fittings are typically available in smaller to medium sizes, while larger diameter fittings are often fabricated and 100% radiography tested to ensure the weld seam is free of defects and meets pressure-holding requirements.
3. What schedule thicknesses do you stock for 317 pipe fittings?
Amardeep Steel Center stocks a wide range of schedules, including Sch 10s, Sch 40s, and Sch 80s. We can also supply heavier schedules like Sch 160 and XXS on request to meet high-pressure application needs.
4. Can I get a Material Test Certificate (MTC) with my order?
Absolutely. We provide an EN 10204 3.1 MTC with every shipment. This certificate provides full traceability, detailing the chemical composition, mechanical properties, and heat treatment of the material.
5. What makes UNS S31700 a better choice than SS 316 for some applications?
The higher molybdenum content in UNS S31700 provides significantly enhanced resistance to pitting, crevice corrosion, and general corrosion, particularly in chloride-containing environments like seawater or chemical processing plants. It offers a higher margin of safety in applications where SS 316 is borderline.
