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Home > Stainless Steel > Stainless Steel 347 and 347H Seamless Pipes
Impex Tube India is a well-known manufacturer and supplier of high-quality pipes and tubes, having its headquarters in Mumbai, India. The company is known for its quality-focused approach and provides a wide variety of stainless steel products, such as Stainless Steel 347 and 347H Seamless Pipes. These pipes are produced with the latest technology and high-quality raw materials, which provide greater strength, durability, and resistance to corrosion. It possesses a robust presence at home as well as aboard with Impex Tube India satisfying multiple industries using stable piping products adhering to stringent standards as well as customers’ specifications at mission-critical applications and trying conditions.
Stainless Steel 347 and 347H Seamless Pipes are stabilized austenitic stainless steels that include chromium (17–19%), nickel (9–13%), and columbium (niobium) to improve intergranular corrosion resistance. The 347H type includes higher carbon content (0.04–0.10%) for better high-temperature strength and creep resistance. Both grades have excellent mechanical properties in terms of a minimum tensile strength of 515 MPa, yield strength of 205 MPa, and elongation of 40%. The qualities render 347 and 347H suitable for high-temperature applications, particularly in conditions with frequent thermal cycling and exposure to corrosive environments.
Range : 6NB to 1200NB
Outer Diameter : 1/8″ NPS to 12″ NPS
Thickness : 0.6 mm to 12.7 mm
Schedules : SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS.
Length : Single Random, Double Random & Cut Length
Specifications : ASTM A312 / ASTM SA312
Types : Round, Square, Rectangle, Hydraulic, Honed Tubes
End : Plain End, Beveled End
| STANDARD | UNS | WERKSTOFF NR. |
| SS 347 | S34700 | 1.4550 |
| SS 347H | S34709 | 1.4961 |
| Ni | 09 – 13 | 09 – 13 |
| N | – | – |
| Cr | 17 – 20 | 17 – 19 |
| C | 0.08 max | 0.04 – 0.08 |
| Si | 1 max | 0.75 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 347and 347H Seamless Pipes from Impex Tube India guarantees exceptional corrosion resistance and high temperature performance. Their pipes are manufactured to exacting standards, ensuring reliability and durability for complex applications. With a focus on customer service, Impex Tube India offers customized solutions and technical support. In addition, the rugged design reduces leakage, making it reliable for a variety of applications.
Impex Tube India, one of the largest suppliers of Stainless Steel 347 and 347H Seamless Pipes 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.
| 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 |
Yes, we offer custom sizes for Stainless Steel 347and 347H Seamless Pipes 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.
Stainless Steel 347 and 347H Seamless Pipes find wide application in conditions of high temperature and stress because they possess good resistance to corrosion and heat. They are commonly utilized in heat exchangers, boilers, and superheaters in power generation plants, and also in chemical and petrochemical process equipment. Their resistance to intergranular corrosion makes them ideal for thermal equipment as well as pressure vessels working under severe conditions. These pipes also find applications in the aerospace, refinery, and food processing sectors. Moreover, their high creep and stress rupture properties at higher temperatures make them a good choice for furnace parts, piping systems, and flue gas purification systems.
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