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ASTM A182 F347 Stainless Steel WNFR Flange
ASTM A182 F347 is a specification for forged or rolled alloy and stainless steel pipe flanges, fittings, valves, and parts for high-temperature service.
The "F347" designation refers to the specific grade of stainless steel used in the flange, which is a stabilized austenitic stainless steel with niobium added for enhanced corrosion resistance and high-temperature strength.
"WNRF" stands for "Weld Neck Raised Face," which is a type of flange design. Weld neck flanges have a long tapered hub that is welded to the pipe, providing reinforcement and a smooth transition for the flow of fluids or gases. The raised face feature provides a sealing surface for gaskets.
Overall, an ASTM A182 F347 Stainless Steel WNRF Flange is a flange made from the specified grade of stainless steel, designed with a weld neck and raised face for use in high-temperature applications.
| SS 347H | |
| Ni | 9 – 13 |
| Cr | 17 – 19 |
| C | 0.04 – 0.10 |
| Mo | 3 – 4 |
| Fe | Balance |
| Mn | 2 max |
| Si | 0.75 max |
| S | 0.03 max |
| P | 0.045 max |
| Co + Ta | 8xC min |
| 1.00 max |
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 |
| Elongation | 35% |
Application
