| Specifications | ASME SA403 / ASTM A403 |
|---|---|
| Dimension Standard | ASME/ANSI B16.9, MSS-SP-43/SP-79, ASME B16.28, ASME B16.25, ASME B16.49 |
| Standard Size Range | 1/2” NB TO 48” NB. (Fabricated, Seamless and 100% X-Ray Welded) |
| Manufacturing Type | Fabricated / Seamless / Welded / ERW |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D, or Custom |
| Wall Thickness / Schedule | SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS / 3mm – 40mm |
| End Connection | Butt Weld |
| Melting Point | 1400-1450°C for (WP317) |
| Outside Diameter (OD) | Seamless / Buttweld Fitting ( 1/2″～48″), ERW / Welded / Fabricated Buttweld Fitting (1/2″～48″) |
| Value Added Services | Hot Dipped Galvanizing, Electro Polish, Sand Blasting, Epoxy & FBE Coating, Threading, Soldering |
| Other Standards | MSS SP-75, ISO, SNSI, JIS, DIN, GB, DIN2617, JISB2311, JISB2312, JISB2313 / T12459GB / T13401, SH3408, SH3409HG / T21635HG / T21631SY / T05010 |
| Material Test Certificates (MTC) | As per EN 10204 3.2 and EN 10204 3.1, Certifying NACE MR0175, NACE MR0103 |
| Materials | AISI 317 |
| Two Halve / Two Joint Buttweld Fittings Size | 6″ to 48″ |
| Manufacturing Specification | ASME: ANSI B16.9, ANSI B16.28, ASME B16.25, MSS-SP-43, DIN: DIN2605, DIN2615, DIN2616, DIN2617, DIN28011, EN: EN10253-1, EN10253-2 |
| A403 SS Seamless Fittings | Size: 15 NB to 300 NB | Sch.& Swg: Sch.5 to Sch.XXs |
| A403 SS Welded Fittings | Size: 15 NB to 600 NB | Sch.& Swg: Sch.5 to Sch.80s |
Stainless Steel 347 / 347H Buttweld Fittings Manufacturer and Supplier in Chennai, India
Meet Fittings, Chennai, India, is a prominent manufacturer and supplier of *Stainless Steel 347 / 347H Buttweld Fittings*, providing high-quality piping solutions for high-temperature and corrosive service applications. The fittings are produced from stabilized austenitic stainless steel, with 347 featuring excellent resistance against intergranular corrosion and 347H delivering superior high-temperature strength thanks to increased carbon content. Meet Fittings produces a large variety of buttweld fittings such as elbows, tees, reducers, and caps in accordance with international standards. They are used extensively across industries like oil & gas, power generation, chemical processing, and heat exchangers, where performance and reliability are of utmost importance.
Table of Contents
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Stainless Steel 347 / 347H Buttweld Fittings Specification
The stainless steel 347 and 347H buttweld fittings are composed primarily of steel, with trace amounts of chromium (17-19%), nickel (9-13%), niobium and tantalum, which provide good corrosion resistance and strength at high temperatures high in The addition of niobium improves the stability of the material It is resistant to intergranular corrosion. Technical properties include high tensile strength (up to 515 MPa for the 347 and 620 MPa for the 347H), excellent weldability and excellent oxidation resistance, especially in environments up to 900°C making these materials ideal for applications requiring resistance to corrosion and corrosion.
Stainless Steel 347 / 347H Buttweld Fittings Chemical Composition
| Element | C | Cr | Mn | Ni | P | S | Si | Cb/Ta |
|---|---|---|---|---|---|---|---|---|
| SS 347 | 0.08 max | min: 17.0 max: 20.0 | 2.0 max | min: 9.0 max: 13.0 | 0.04 max | 0.30 max | 0.75 max | min:10x C max: 1.0 |
| SS 347H | min: 0.04 max: 0.10 | min: 17.0 max: 20.0 | 2.0 max | min: 9.0 max: 13.0 | 0.03 max | 0.30 max | 0.75 max | min:10x C max: 1.0 |
Stainless Steel 347 / 347H Buttweld Fittings Mechanical Properties
| Grade | Tensile Strength ksi (MPa) min | Yield Strength 0.2% ksi offset ksi (MPa) min | Elongation (% in 50mm) min | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 347/347H | 75 (515) | 30 (205) | 40 | 201 | 95 |
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Largest Stainless Steel 347 / 347H Buttweld Fittings Supplier in Chennai, India
Stainless Steel 347 / 347H Buttweld Fittings consist of chromium (17–20%), nickel (9–13%), and columbium (niobium) that stabilizes the alloy and avoids carbide precipitation during welding. 347H has greater carbon content (0.04–0.10%) than 347 (up to 0.08%) to enhance creep strength and mechanical properties at higher temperatures. The fittings have excellent tensile strength of approximately 515 MPa and yield strength of 205 MPa, along with adequate oxidation and corrosion resistance under harsh service conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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Stainless Steel 347 / 347H Buttweld Fittings Equivalent Grade
| STANDARD | UNS | WNR. | EN | JIS | GOST |
|---|---|---|---|---|---|
| SS 347 | S34700 | 1.4550 | X6CrNiNb18-10 | SUS 347 | 08Ch18N12B |
| SS 347H | S34709 | 1.4961 | X6CrNiNb18-12 | SUS 347H | – |
Why Choose Stainless Steel 347 / 347H Buttweld Fittings from Meet Fittings?
Stainless Steel 347 Buttweld Fittings from Meet Fittings offer exceptional corrosion resistance, especially in seawater and harsh environments. They are known for their high strength, durability, and resistance to pitting and crevice corrosion, ensuring long-lasting performance. We provide precise manufacturing, quality control, and reliable service for diverse industrial applications.
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Stainless steel 347 and 347H Buttweld Fittings provide excellent resistance to intergranular corrosion, making them ideal for high temperature applications These alloys contain columbium and tantalum to stabilize the material and prevent carbide precipitation during welding. They are highly resistant to oxidation, providing long-term durability under extreme conditions. Stainless steel 347 provides excellent woldability and is suitable for applications in industries such as aerospace, chemical processing, and electrical equipment. The high-carbon 347H variant provides good strength at high temperatures, making it ideal for high-pressure environments.
Types of Stainless Steel 347 / 347H Buttweld Fittings
Stainless Steel 347 / 347H Buttweld Fittings Dimensions Chart
| Nominal Pipe Size (inches) | Outside Diameter | 45°Elbows | 90° Elbows | 180° Returns | ||||
|---|---|---|---|---|---|---|---|---|
| Long Radius | Long Radius | Short Radius | Long Radius | |||||
| (mm) | (inches) | Center to Face (inches) | Radius (inches) | Center to Face (inches) | Center to Face (inches) | Center to Center (inches) | Back to face (inches) | |
| 1 | 33.4 | 1.315 | 7/8 | 1 1/2 | 1 | 3 | 2 3/16 | |
| 1/2 | 21.3 | 0.840 | 5/8 | 1 1/2 | – | 2 | 1 7/8 | |
| 3/4 | 26.7 | 1.050 | 7/16 | 1 1/8 | – | 2 1/4 | 1 11/16 | |
| 1 1/4 | 42.2 | 1.660 | 1 | 1 7/8 | 1 1/4 | 3 3/4 | 2 3/4 | |
| 1 1/2 | 48.3 | 1.900 | 1 1/8 | 3 | 2 1/4 | 1 1/2 | 4 1/2 | 3 1/4 |
| 2 | 60.3 | 2.375 | 1 3/8 | 4 | 3 | 2 | 6 | 4 3/16 |
| 2 1/2 | 73.0 | 2.875 | 1 3/4 | 5 | 3 3/4 | 2 1/2 | 7 1/2 | 5 3/16 |
| 3 | 88.9 | 3.500 | 2 | 6 | 4 1/2 | 3 | 9 | 6 1/4 |
| 3 1/2 | 101.6 | 4.000 | 2 1/4 | 7 | 5 1/4 | 3 1/2 | 10 1/2 | 7 1/4 |
| 4 | 114.3 | 4.500 | 2 1/2 | 8 | 6 | 4 | 12 | 8 1/4 |
| 5 | 141.3 | 5.563 | 3 1/8 | 10 | 7 1/2 | 5 | 15 | 10 5/16 |
| 6 | 168.3 | 6.625 | 3 3/4 | 12 | 9 | 6 | 18 | 12 5/16 |
| 8 | 219.1 | 8.625 | 5 | 12 | 12 | 8 | 24 | 16 5/16 |
| 10 | 273.1 | 10.750 | 6 1/4 | 15 | 15 | 10 | 30 | 20 3/8 |
| 12 | 323.9 | 12.750 | 7 1/2 | 18 | 18 | 12 | 36 | 24 3/8 |
Are Custom Sizes Available for Stainless Steel 347 / 347H Buttweld Fittings?
Yes, custom sizes for Stainless Steel 347 / 347H Buttweld Fittings are available at Meet Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@meetfitings.co.in.
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Application Industry of Stainless Steel 347 / 347H Buttweld Fittings
Stainless Steel 347 / 347H Buttweld Fittings are well suited for applications at elevated temperatures like heat exchangers, furnace parts, pressure vessels, superheaters, boiler tubes, and chemical processing equipment. Due to their immunity to intergranular corrosion, they find applications in heat- and stress-exposed welded structures. 347H is especially used in applications where prolonged exposure to temperatures over 550°C is anticipated. These fittings offer robust, leak-tight, and long-lasting connections that deliver safe and durable performance in demanding piping systems installed in severe and thermally harsh industrial conditions.
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