Stainless Steel 347 Pipe Fittings
Rose Metal Industries is a trusted manufacturer, stockist, and global exporter of Stainless Steel 347 Pipe Fittings, supplying premium-grade elbows, tees, reducers, stub ends, and end caps for high-temperature and corrosive industrial applications. SS 347 is a niobium-stabilized austenitic stainless steel designed to offer exceptional resistance against intergranular corrosion. This alloy is ideal for systems requiring continuous service at elevated temperatures. Our wide distribution network enables fast delivery of SS 347 pipe fittings across Tamilnadu, Andhra Pradesh, Karnataka, Telangana, Puducherry (Pondicherry), and the Andaman & Nicobar Islands, as well as major international markets..
These Stainless Steel 347 Pipe Fittings are produced in accordance with global manufacturing standards such as ASTM A403 WP347 / WP347H to ensure maximum durability, pressure resistance, and corrosion performance. Rose Metal Industries manufactures fittings in various types—seamless, welded, buttweld, and fabricated—ensuring compatibility with petrochemical pipelines, chemical processing units, power generation systems, and heat-exposed pipelines. The stabilizing element niobium improves the material’s ability to resist chromium carbide precipitation, enhancing its performance during welding and high-temperature operation..
Industrial regions such as Chennai, Bengaluru, Hyderabad, Visakhapatnam, Coimbatore, Mysuru, Vijayawada, Puducherry, and Port Blair depend heavily on materials that can withstand both high temperatures and harsh coastal conditions. SS 347 pipe fittings supplied by Rose Metal Industries are specifically engineered for applications in these demanding environments, making them an excellent choice for refineries, boilers, exhaust manifolds, thermal power plants, and marine engineering sectors. Their oxidation resistance up to 870°C makes them ideal for elevated temperature service..
To support diverse project requirements, Rose Metal Industries maintains an extensive stock of SS 347 elbows (90°, 45°, long radius, short radius), equal and reducing tees, concentric and eccentric reducers, caps, collars, and stub ends. These fittings are available in multiple dimensions, wall thicknesses, and schedules such as Sch 10, Sch 40, Sch 80, and XXS. Our fittings are processed with finishing options such as pickled & passivated surfaces, shot-blasted finishes, and polished surfaces to ensure corrosion-free and smooth flow operations..
| Grade | Stainless Steel 347 / 347H |
|---|---|
| Standard | ASTM A403 / ASME SA403 |
| Fitting Types | Elbow, Tee, Reducer, Cap, Stub End, Cross |
| Size Range | ½” to 48” |
| Schedule | SCH 10, SCH 20, SCH 40, SCH 80, SCH 160 |
| Connections | Butt Weld, Socket Weld, Threaded |
Chemical Composition
| Element | Content (%) |
|---|---|
| C | 0.08 max |
| Cr | 17.0 – 19.0 |
| Ni | 9.0 – 13.0 |
| Nb | 10xC min |
| Mn | 2.00 max |
| Si | 1.00 max |
| S | 0.03 max |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength | 205 MPa min |
| Elongation | 40% min |
| Hardness (Brinell) | ≤ 201 HB |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S34700 / S34709 |
| WNR | 1.4550 / 1.4961 |
| EN | X6CrNiNb18-10 |
| JIS | SUS 347 |
Dimension Chart (Sample)
| NPS | OD (mm) | Wall Thickness (SCH 40) |
|---|---|---|
| ½ | 21.3 | 2.77 |
| 1 | 33.4 | 3.38 |
| 2 | 60.3 | 3.91 |
| 4 | 114.3 | 6.02 |
| 6 | 168.3 | 7.11 |
Applications
- Chemical & Petrochemical Plants
- Heat Exchangers & Boilers
- Refinery Piping Systems
- Power Generation Units
- Offshore & Marine Installations (suitable for coastal areas of Tamil Nadu, Puducherry, Andaman)
- Food Processing & Pharmaceutical Industries
The corrosion resistance capabilities of SS 347 Pipe Fittings make them suitable for highly acidic, alkaline, and oxidizing environments, especially where nitric acid exposure is common. This makes them widely used in chemical processing industries, pharmaceutical plants, food processing units, marine structures, and high-temperature exhaust systems. Industries in coastal regions of Tamilnadu, Puducherry, Karnataka, and the Andaman & Nicobar Islands benefit from their long service life and resistance to salt-laden air and humidity..
Every batch produced by Rose Metal Industries undergoes stringent quality checks including mechanical testing, chemical composition analysis, hardness testing, hydrostatic pressure testing, and non-destructive testing methods (UT, RT, PMI). These fittings are packed in durable, seaworthy packaging suitable for long-distance transportation to global destinations. With strong technical support, competitive pricing, and reliable quality assurance, Rose Metal Industries continues to be a preferred global supplier of Stainless Steel 347 Pipe Fittings for high-performance industrial applications...
Frequently Asked Questions (FAQ)
Q1: What is the difference between Stainless Steel 347 and 347H Pipe Fittings?
A: Grade 347 contains niobium for stabilization against intergranular corrosion, whereas 347H has a higher carbon content for improved high-temperature strength. SS 347H Pipe Fittings are preferred for elevated temperature services, while SS 347 is widely used for general corrosion-resistant applications.
Q2: Do you provide Mill Test Certificates (MTC) for SS 347 Pipe Fittings?
A: Yes — Rose Metal Industries supplies MTCs with each order. We also provide PMI testing, third-party inspection and chemical/mechanical test reports for clients across Tamilnadu, Andhra Pradesh, Karnataka, Telangana, Puducherry and the Andaman & Nicobar Islands.
Q3: What standards do your Stainless Steel 347 Pipe Fittings meet?
A: Our SS 347/347H Pipe Fittings comply with ASTM A403, ASME SA403, ANSI B16.9, MSS-SP-43 and EN standards. We can also supply fittings according to specific project specifications for global exports.
Q4: Do you offer customized sizes, schedules and end connections?
A: Yes — we provide custom sizes, wall thicknesses, special schedules (SCH 10 to SCH 160), and end connections such as butt-weld, socket-weld and threaded types. Tailor-made fittings are available for chemical, refinery, marine, and high-temperature applications across South India and international markets.
Q5: Where do you supply Stainless Steel 347 Pipe Fittings?
A: We supply SS 347 Pipe Fittings across Tamilnadu, Andhra Pradesh, Karnataka, Telangana, Puducherry (Pondicherry) and the Andaman & Nicobar Islands, as well as export shipments to Europe, the Middle East, Africa, the USA and Southeast Asia.