| 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 (WP321) |
| 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 321 |
| 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 |
Meet Fittings, established in Chennai, India, is a major producer and seller of *Stainless Steel 321 / 321H Buttweld Fittings*, which provide high-quality solutions for use where high resistance to high-temperature oxidation as well as intergranular corrosion is needed. The buttweld fittings are produced from stabilized austenitic stainless steel that has been developed for better weldability and long-term performance in heat-intensive environments. Meet Fittings offers a broad variety of products such as elbows, tees, reducers, and caps in 321 and high-carbon 321H grades. With emphasis on precision, quality, and customer satisfaction, the company supplies products to a broad spectrum of industries such as petrochemical, oil & gas, power, and heat treatment.
Table of Contents
Stainless Steel 321 Pipe Elbow In India, Stainless Steel 321H Pipe Fittings Chennai, SS 321 Buttweld Elbow Chennai, Stainless Steel S32100 Seamless Fittings Exporter Chennai, Stainless Steel 1.4541 Butt Weld Pipe Fittings in India, Stainless Steel 321H Two Joint Pipe Fittings Chennai, 321 Stainless Steel Welded Fittings Manufacturers in India, Stainless Steel 321H Buttweld Fittings In India, ASTM A403 WP3 321 Stainless Steel Buttweld Fittings Supplier in Chennai, India.
Stainless Steel 321 / 321H Buttweld Fittings Specification
Stainless Steel 321 / 321H Buttweld Fittings are titanium-strength austenitic stainless steel with excellent corrosion resistance. SS 321 contains 17-19% chromium, 9-12% nickel and trace amounts of titanium, while SS 321H has higher carbon content for better strength at high temperatures These fittings provide 515 MPa tensile strength, 205 MPa yield strength and 40% length of action. Their high intergranular corrosion resistance makes them suitable for environments up to 870°C. These fittings are widely used in petrochemical, power generation and heat exchanger applications.
Stainless Steel 321 / 321H Buttweld Fittings Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
Stainless Steel 321 / 321H Buttweld Fittings Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
ASTM A403 Stainless Steel 321 Buttweld Fittings Cross in India, Stainless Steel 1.4449 Buttweld Pipe Fittings Chennai, SS 321H Butt Weld Pipe Cap Chennai, Stainless Steel 321 Eccentric Reducer Chennai, Stainless Steel 321H Equal Tee India, 321 Stainless Steel Reducer in Chennai, Stainless Steel 321H SR Elbow Exporter in India,
Largest Stainless Steel 321 / 321H Buttweld Fittings Supplier in Chennai, India
Stainless Steel 321 / 321H Buttweld Fittings consist of chromium (17–19%), nickel (9–12%), and minimum five times the carbon content titanium, which stabilizes the alloy and inhibits precipitation of carbides. Grade 321H contains greater carbon content (0.04–0.10%) than grade 321 (max. 0.08%) for enhanced high-temperature strength. These fittings contain a tensile strength of around 515 MPa, yield strength of 205 MPa, and excellent ductility and toughness. Their very good mechanical properties, along with resistance to scaling and stress rupture, qualify them for application in long-term elevated temperature service.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
If You Are Looking To Buy High Quality
Stainless Steel 321 / 321H Buttweld Fittings Equivalent Grade
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
Why Choose Stainless Steel 321 / 321H Buttweld Fittings from Meet Fittings?
Stainless Steel 321 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.
UNS S32109 Stub End Uk, ANSI B16.9 Stainless Steel 321 Pipe Fittings Chennai, Stainless Steel 321H Pipe Bend Stockist in Chennai, Stainless Steel 321 Pipe Nipple Manufacturer & Exporter in Chennai, Stainless Steel 1.4878 Butt Weld Pipe Fittings in India, Stainless Steel 321H Pipe Two Joint Pipe Fittings Chennai, 321 Stainless Steel Pipe Welded Fittings Manufacturers in India, Stainless Steel 321 Pipe Butt weld Fittings In India, ASTM A403 Stainless Steel 321H Pipe Butt Weld Fittings Supplier in Chennai, India.
Customer Support
Largest Inventory
On Time Deliveries
ISO Certified
Stainless steel 321/321H Buttweld Fittings provide excellent resistance to intergranular corrosion, making them ideal for high temperature applications. Their titanium stabilizer ensures excellent strength and durability even in extreme temperatures. The fittings are resistant to oxidation and scaling, maintaining structural integrity at elevated temperatures. Weldability and flexible formability make them suitable for complex piping systems. Their improved creep and stress breakdown properties ensure reliability in harsh environments. Furthermore, these materials are low cost, require little maintenance, and are versatile in the chemical, petrol and power industries.
Types of Stainless Steel 321 / 321H Buttweld Fittings
Stainless Steel 321 / 321H 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 321 / 321H Buttweld Fittings?
Yes, custom sizes for Stainless Steel 321 / 321H 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.
ASTM A403 Stainless Steel 321 Butt Weld Cross in India, Stainless Steel 1.4878 Buttweld Pipe Fittings Chennai, SS 321H Butt Weld Pipe Cap Chennai, Stainless Steel 321 Eccentric Reducer Chennai, Stainless Steel 321H Equal Tee India, 321 Stainless Steel Reducer in Chennai, SS 321H SR Elbow Exporter in India,
Application Industry of Stainless Steel 321 / 321H Buttweld Fittings
Stainless Steel 321 / 321H Buttweld Fittings find wide application in industries that have the need for sustained operation between 500°C and 900°C. Some of the common applications are heat exchangers, furnace components, exhaust manifolds, boiler tubes, piping for refineries, and aircraft exhaust systems. The titanium stabilization provides resistance to intergranular corrosion after welding and exposure to elevated temperatures. 321H is particularly well-suited for pressure vessels and high-temperature structural uses because of its increased creep strength. The fittings offer dependable, leak-tight connections and extended service life in severe thermal and chemical processing applications.
Our Products
Other Products
Other Material
