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Home > Stainless Steel > Stainless Steel 347/347H Seamless Tubing
Impex Tube India is one of the leading manufacturers and exporters of high-grade pipes and tubes in Mumbai, India, which provides a wide variety of products such as Stainless Steel 347 and 347H Seamless Pipes. They are renowned for their excellent craftsmanship and compliance with international standards and offer piping solutions that guarantee high performance, longevity, and resistance to corrosion. With advanced manufacturing capabilities and a customer-focused strategy, Impex Tube India caters to multiple industrial segments by providing dependable seamless pipes suitable for harsh environments, particularly high-temperature and corrosive applications.
Stainless Steel 347 and 347H Seamless Pipes are stabilized austenitic stainless steels containing mainly 17–20% chromium and 9–13% nickel, with a content of niobium added for increased resistance to intergranular corrosion. 347H grade contains increased carbon (0.04–0.10%) content for enhanced high-temperature strength. These pipes contain excellent mechanical properties, tensile strength approximately 515 MPa, yield strength of 205 MPa, and sufficient elongation and toughness. They contain composition through which they provide structural stability and show resistance against scaling and sensitization in the form of high-pressure and high-temperature environment.
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 Impex Tube India 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 Impex Tube India for durable, high-performance seamless tubing that meets the highest industry standards.
Impex Tube India, one of the largest suppliers of Stainless Steel 347/347H Seamless Tubing in Mumbai, 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 Impex Tube India is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@impextubeind.com.
| 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 |
Stainless Steel 347 and 347H Seamless Tubes find broad applications in high-temperature oxidation and corrosion-resistant industries. They find general use in heat exchangers, boilers, superheaters, and furnace parts. They are also best suited to be used in petroleum refining, chemical processing, and power generation industries where continuous exposure to high temperatures and aggressive chemicals is seen. In aerospace and marine industries, they find application in exhaust systems and high-pressure piping. Their capacity to operate dependably in thermal cycling environments and withstand stress-related corrosion makes them ideal for critical systems, guaranteeing longevity and reliable performance in harsh operations.
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