Stainless Steel 347H Flanges are high-performance components designed for use in high-temperature service environments. Manufactured using stabilized austenitic stainless steel, these flanges are an ideal choice for applications requiring excellent resistance to intergranular corrosion, high creep strength, and good mechanical properties at elevated temperatures. At Adinox Overseas, we specialize in providing top-quality Stainless Steel 347H Flanges, meeting the rigorous standards of ASTM A182 F347H and UNS S34709.
These flanges are particularly well-suited for petrochemical, power generation, heat exchangers, boilers, and high-pressure systems. The addition of columbium (niobium) in grade 347H helps stabilize the material against chromium carbide precipitation, making it suitable for prolonged exposure to high temperatures without risk of sensitization. Due to its excellent strength and corrosion resistance, 347H stainless steel flanges are extensively used in the fabrication of components for heat-intensive industrial processes.
The standard specifications of these flanges follow universal designations such as UNS S34709 and ASTM A182 F347H. These standards ensure uniformity in production and performance, providing users with confidence in their long-term application. The elevated carbon content in 347H, compared to standard 347, provides enhanced high-temperature tensile and creep strength. These flanges are widely available in multiple types including weld neck, slip-on, blind, threaded, socket weld, and lap joint, customized as per client requirement.
Adinox Overseas supplies ASTM A182 F347H flanges with full traceability and quality assurance. All our products are delivered with material test certificates in compliance with EN 10204 3.1/3.2, ensuring customers receive only the most reliable and traceable materials. Whether it’s for aggressive chemical environments or heavy industrial use, our flanges maintain structural integrity and performance, even under extreme conditions.
| Specification | ASTM A182 / ASME SA182 |
|---|---|
| Dimension Standard | ANSI/ASME B16.5, B16.47 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" (1200 NB) |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Flange Face Type | Flat 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, PN 10, PN 16, PN 25, PN 40, PN 64, PN 100, PN 160, PN 250, BS 10, BS Table D, E, F, H |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| SS 347H | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | - | 8 – 11 | - |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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