- sales@ojaspipesandtubes.co.in
- Kolkata, Kolkata
Home > Stainless Steel > Stainless Steel 347/347H Seamless Tubing
Ojas Pipes and Tubes stands out as a premier manufacturer and supplier of Stainless Steel 347/347H seamless tubing right in the heart of Kolkata, India. We take pride in delivering top-notch tubing solutions designed for high-temperature and corrosive environments. Our seamless tubing is crafted to offer outstanding resistance to intergranular corrosion and high-temperature creep, making it a reliable choice for critical applications. Built to meet international standards, our 347/347H seamless tubes are perfect for situations where reliability and structural integrity are non-negotiable. With a strong focus on precision, quality, and customer satisfaction, Ojas Pipes and Tubes serves a variety of industries, including petrochemical, power generation, aerospace, and chemical processing, providing them with trustworthy stainless steel tubing solutions.
Our Stainless Steel 347/347H seamless tubing is composed of 17–20% chromium and 9–13% nickel, with niobium (columbium) added to enhance its resistance to intergranular corrosion. The 347H grade, featuring a higher carbon content of 0.04–0.10%, offers improved strength at elevated temperatures. These tubes boast a tensile strength of around 515 MPa, a yield strength of 205 MPa, and an elongation of about 35%. They maintain excellent mechanical properties even under thermal cycling, provide superior weldability, and are perfect for continuous high-temperature service where corrosion resistance and structural stability are crucial.
Tube Range : 6.35 mm OD To 101.6 mm OD Guage: 25 SWG – 10 SWG
Outer Diameter : 3.00 mm – 219.10 mm
Wall Thickness : 0.40 mm – 12.70 mm
Schedules : 5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH
Length : Upto 30 meters, Custom Cut Lengths
Specifications : ASTM A213 / ASTM SA213
Types : Round, Square, Rectangle, Coil, “U” Shape, Hydraulic & Honed Tubes
| SS | 347 | 347H |
| Ni | 09 – 13 | 09 – 13 |
| N | – | – |
| Cr | 17 – 20 | 17 – 19 |
| C | 0.08 max | 0.04 – 0.08 |
| Si | 1 max | 1 max |
| Mn | 2 max | 2 max |
| P | 0.045 max | 0.045 max |
| S | 0.030 max | 0.03 max |
| OTHER | Nb=10(C+N) – 1.0 | 8xC min – 1.00 max |
| Grade | 347 / 347H |
| Tensile Strength (MPa) min | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 |
| Elongation (% in 50mm) min | 40 |
| Hardness | |
| Rockwell B (HR B) max | 92 |
| Brinell (HB) max | 201 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 347/347H seamless tubing from Ojas Pipes and Tubes ensures you receive a product of exceptional quality and reliability. Our tubing is designed to withstand high temperatures and resist intergranular corrosion, making it ideal for demanding applications in the chemical, petrochemical, and aerospace industries. We adhere to strict quality control measures and offer comprehensive testing to ensure optimal performance. Our experienced team provides personalized solutions tailored to your specific requirements, guaranteeing customer satisfaction. Trust Ojas Pipes and Tubes for durable, high-performance seamless tubing that meets the highest industry standards.
Ojas Pipes and Tubes, one of the largest suppliers of Stainless Steel 347/347H Seamless Tubing in Kolkata, India, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.
Yes, we offer custom sizes for Stainless Steel 347/347H Seamless Tubing to meet your specific requirements. Our team at Ojas Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@ojaspipesandtubes.co.in.
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 347 | S34700 | 347s31 | 58G | 1.4550 | X6CrNiNb18-10 | 2338 | SUS 347 |
You’ll find Stainless Steel 347/347H seamless tubing widely utilized in applications that demand high-temperature strength and corrosion resistance. It’s commonly found in heat exchangers, boilers, and superheaters in power plants and refineries. In the chemical and petrochemical industries, it’s used for reactor tubing, catalytic reformers, and fluid transfer lines. The aerospace and marine sectors depend on these tubes for exhaust manifolds and high-temperature fluid systems. Their resistance to sensitization and excellent weldability make them ideal for welded assemblies that operate under high pressure and heat, ensuring durability and reliability across essential infrastructure projects.
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