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Home > Stainless Steel > Stainless Steel 347 and 347H Welded Pipes
Impex Tube India is a reliable manufacturer and supplier of high-quality pipes and tubes based in Mumbai, India. It is an expert in providing high-quality products such as Stainless Steel 347 and 347H Welded Pipes, which are renowned for their high strength and heat resistance. With a high emphasis on quality and innovation, Impex Tube India provides several industrial sectors with dependable and long-lasting piping solutions. Their modern production plants and stringent quality control measures guarantee that every product is up to international standards, capturing the varied demands of domestic and international customers across numerous high-demanding industries.
Stainless Steel 347 and 347H Welded Pipes are stabilized austenitic stainless steels with chromium (17–20%), nickel (9–13%), and columbium (niobium), which enhances intergranular corrosion resistance. 347H is a high-carbon variant with greater high-temperature strength. The alloys have tensile strength of approximately 515 MPa, yield strength of 205 MPa, and elongation of 35% or higher. Their superior oxidation resistance and mechanical properties at high temperatures make them ideal for high-stress, high-temperature applications. Their weldability and longevity further increase their versatility in various industrial applications.
Specifications : ASTM A312 / ASME SA312
Outside Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size available Ex-stock
Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Size : 1/2″ NB – 24″ NB
Type : Welded
Form: Round Pipes, Square Pipes, Rectangular Pipes.
Length : Single Random, Double Random & Required Length
End : Plain End, Beveled End, Treaded
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
| SS 347H | 1.4961 | S34709 | SUS 347H | – | X6CrNiNb18-12 |
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 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 % |
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 and 347H Welded Pipes guarantees excellent corrosion resistance, high strength, and durability. Designed for diverse industrial applications, it delivers reliable performance in tough environments while maintaining competitive pricing for cost-effective solutions.
Impex Tube India, a leading manufacturer and supplier of Stainless Steel 347 and 347H Welded Pipes in Mumbai, India, offers a comprehensive range of high-quality pipes and tubing suitable for various industrial applications. Our extensive inventory and commitment to exceptional service make us a trusted choice for regional products.
| NB Sizes | Sch 5 | Sch 10 | Sch 40 | Sch 80 | Sch 160 |
| 1/8″ | ✓ | ✓ | ✓ | ✓ | |
| 1/4″ | ✓ | ✓ | ✓ | ✓ | |
| 3/8″ | ✓ | ✓ | ✓ | ✓ | |
| 1/2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3/4″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1 1/4″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1 1/2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2 1/2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 4″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 5″ | ✓ | ✓ | ✓ | ✓ | |
| 6″ | ✓ | ✓ | ✓ | ✓ |
We offer custom sizes for Stainless Steel 347 and 347H Welded Pipes to meet your specific needs. Our dedicated team at Impex Tube India provides tailored solutions for all your piping and tubing requirements. For more information, contact us at sales@impextubeind.com.
Stainless Steel 347 and 347H Welded Pipes are commonly employed in heat-resisting and corrosion-resisting applications in various industries. They can be seen in high-temperature chemical processing, power generation, petroleum refining, and heat exchanger equipment. Their resistance to intergranular corrosion after heating at high temperatures makes them perfectly suited for uses involving constant heating, including parts of furnaces, boiler tubes, and components of superheaters. 347H, with its greater carbon content, provides increased strength for high temperature service. The pipes are also utilized in the aerospace, food processing, and pharmaceutical industries where purity and performance are critical.
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