Harsh Metalloys, a reputable manufacturer and supplier based in Mumbai, India, specializes in high-quality Stainless Steel 347 Pipes designed for applications that demand exceptional strength, heat resistance, and protection against corrosion. These pipes are crafted from a stabilized austenitic stainless steel alloy that includes niobium (columbium), effectively preventing intergranular corrosion and sensitization during welding or when exposed to high temperatures for extended periods. Complying with ASTM A312 and ASME standards, SS 347 pipes come in seamless, welded, and ERW forms. They are perfect for critical operations in sectors like chemical processing, power generation, refineries, and aerospace, ensuring reliable performance and a long service life.
Stainless Steel 347 Pipes are composed of 17–20% Chromium and 9–13% Nickel, with stabilization from Niobium (Nb ≥ 10xC) to prevent carbide precipitation during welding and high-temperature applications. This alloy showcases impressive tensile strength (515–690 MPa), excellent creep resistance, and oxidation protection at temperatures reaching up to 870°C. In their annealed state, SS 347 pipes are non-magnetic, easily weldable, and maintain their mechanical stability even under thermal stress and corrosive conditions. These characteristics make them ideal for both structural and process piping systems in challenging industrial environments.
| Standard | ASTM A312, A358 / ASME SA312, SA358 |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Thickness | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated Pipes |
| Form | Round, Square, Rectangular, Oval, Hydraulic Etc |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18.00 – 20.00 | 3.00 – 4.00 | 11.00 – 15.00 | 57.845 min |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Contact us to get a quick quote for your requirement.
We assures best quality Stainless Steel 347 Pipes through high level testing and certification. Each pipe is tested with hydrostatic, ultrasonic and chemical composition testing to assure strength and durability according to the market specifications. Being ISO 9001:2015, ASTM A312, and other international standard certified pipes will ensure the desired reliability, anti-corrosive qualities, and great performance.
SS 347 seamless pipes are known for their exceptional strength and resistance to corrosion, making them perfect for high-temperature and high-pressure settings like chemical processing, power generation, and the aerospace sector.
Welded SS 347 pipes provide a budget-friendly option without compromising on corrosion resistance and durability. They are typically used in low to medium pressure situations across industries such as petrochemical, food, and pharmaceuticals.
SS 347 ERW (Electric Resistance Welded) pipes guarantee uniform wall thickness and precise dimensions, making them ideal for water, gas, and structural applications in environments prone to corrosion.
Electric Fusion Welded SS 347 pipes are perfect for large-diameter applications that require high temperatures, offering outstanding strength and resistance to intergranular corrosion.
SS 347 rectangular pipes are utilized in architectural, structural, and mechanical projects, providing a strong and corrosion-resistant option for load-bearing and frame-based constructions.
Square pipes crafted from SS 347 deliver excellent corrosion resistance and structural strength, making them suitable for construction, fabrication, and decorative purposes in challenging environments.
Stainless Steel 347 Pipes are widely used in high-temperature and corrosive applications across various industries. They are ideal for use in heat exchangers, furnace components, superheaters, exhaust systems, and high-pressure steam piping. In the petrochemical and chemical industries, SS 347 pipes are favored for their resistance to intergranular corrosion after welding. They are also extensively used in aerospace, nuclear power plants, and marine engineering where high mechanical strength and oxidation resistance are critical. These pipes provide a reliable and cost-effective solution for transporting fluids and gases in extreme conditions without compromising safety or performance.
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