In the piping system, the flanges are used for the purpose of connecting the two pipes and pipe fittings like chock, valves, tee, cross, etc. Piyush Steel one of the leading manufacturer, exporter, and supplier of the superior quality of comprehensive ranges of Stainless steel 347H flanges. We are highly acknowledged in the global market by offering the commendable quality of these grade flanges to the national and international buyers. Our offered ranges of Stainless steel 347H flanges are having good properties to offer because of which it has become an ideal selection for various purposes. These flanges are broadly used in ranges of industries including chemical process, cement industries, pharmaceuticals, etc. We are providing these flanges to our buyers at various specifications that are varying differently in standards, dimensions, sizes, classes/pressures, etc. Also, we are providing the product to the buyers at custom-made specifications according to the demands made by the esteem patrons.
Table Of Content
Alloy information-
Alloy SS 347H that is also called as UNS S3409 is the greater version of the alloy 347 and is having a carbon content of 0.04 to 0.10%. The reason for the development of this alloy is to improvise the creep resistance for the greater temperature that ranges above 5327 Deg C. In many cases, the carbon content is enabling dual certifications.
Manufacturing of the flanges-
The Stainless steel 347H flanges are manufactured at our highly operational manufacturing plant under the tight supervision of a team of professional experts. The development and designing of the flanges are done according to the well-defined manufacturing guidelines and national and international product quality standards. The development of the flanges is done by using the superior quality of alloy that is collected from reliable market vendors only.
The use of sophisticated technology and modern tools has helped us in making the fine quality of flanges that can easily be used at any industrial applications. To check the quality of the flanges, we are having a team of quality checker that is examining the product quality according to quality control norms. All these assure us in making and delivering premium quality of the product.
Testing of the flanges-
The testing of each and every ranges of Stainless steel 347H flanges are done at our manufacturing unit is to check its purity and strength. Therefore to examine the product with full effectiveness we are conducting certain tests like-
• Positive material identification test
• Intergranular corrosion test
• Pitting resistance test
• Macro test
• Micro test
• Chemical test
• Mechanical test
• Hardness test
Product documenting-
At the time of supplying and exporting of the product, we are providing certain reports and certifications to buyers in the form of product documentation. These are provided to the buyers just to make them assure about the quality of flanges delivering. The flanges test certifications offered by us are including raw material certifications, third-party inspection test report, 100% radiography test report, mill test certifications as per En 10204/3.1b. The other reports and certifications provided are PMI test report, IBR test report, commercial invoice, packaging list, heat treatment chart, QAP, raw material test report, material traceability report, NABL approved lab testing report, etc.
Inspection-
We are inviting the third party inspection at our industry just to assure all about whether the development of Stainless steel 347H flanges is done perfectly or not. The inspection is done by the legally certified and well trained third party agency team based upon a few inspection parameters.
Packaging-
Stainless steel 347H flanges are properly wrapped using plastic sheets and then it is placed into wooden boxes or carton boxes for safer transit.
SS 347H is an austenitic stainless steel containing 17-19% chromium, 9-13% nickel, 1.0-1.2% silicon and 0.30% carbon along with other trace elements such as manganese, molybdenum and nitrogen. It is known for its excellent corrosion resistance and high temperature strength, making it ideal for applications that require exposure to extreme temperatures or corrosive environments.
SS 347H is generally considered to have better corrosion resistance and higher temperature strength than SS 347. It also has a lower carbon content, which lowers the risk of sensitization and reduces the risk of weld decay. SS 347H can be used in applications requiring extreme temperature exposure or corrosive environments, whereas SS 347 is not as well suited for those purposes.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN | UNI |
| SS 347H | 1.4961 | S34709 | SUS347H | X7CrNiNb18-10 | - |
Pipe Specification : ASTM A182 / ASME SA182
Dimension Standard : ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size : 1/2" (15 NB) to 48" (1200NB)
Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
DIN Flanges : DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
JIS Flanges : JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K
BS Flanges : BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | - | 9.00 – 13.00 | 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 % |
The full identification of the flanges should be continuously marked down its whole length, including :

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ASME Flanges, DIN Flanges, ANSI Flanges With Mill And Third Party Test Certificate.
Stainless Steel 347H Flanges Price List
Request the latest Stainless Steel 347H Flanges Price List. Please Call +91 22 23867540 or Send an Email to [email protected] for Stainless Steel UNS S34709, 1.4961, SUS 347H Pipe Flanges Ready stock information and updated price list.