The F347/H ASTM Concentric Reducer is a vital component in piping systems, used to connect pipes of different diameters while maintaining a consistent centerline. Made from stainless steel grades F347 and F347H, this reducer offers excellent resistance to intergranular corrosion and superior strength at high temperatures. The inclusion of niobium in the alloy prevents carbide precipitation, enhancing its durability in harsh environments. The “H” variant, with a higher carbon content, is especially suited for applications involving elevated temperatures. This fitting is commonly used in industries such as chemical processing, petrochemical, and power generation, where it ensures smooth flow transitions and reliable performance under demanding conditions.
| Property | Details |
|---|---|
| Standard | ASTM A182 |
| Material | Stainless Steel F347/H |
| Chemical Composition | Chromium (Cr): 17-19%<br>Nickel (Ni): 9-13%<br>Carbon (C): Max 0.10% (F347), 0.04-0.10% (F347H)<br>Niobium (Nb): 10 x C Min<br>Manganese (Mn): Max 2%<br>Silicon (Si): Max 1%<br>Phosphorus (P): Max 0.045%<br>Sulfur (S): Max 0.03% |
| Mechanical Properties | Tensile Strength: Min 515 MPa (75,000 psi)<br>Yield Strength: Min 205 MPa (30,000 psi)<br>Elongation: Min 40% |
| Type | Concentric Reducer |
| Connection Type | Welded connections |
| Size Range | Custom sizes available, typically from 1/2″ to 24″ |
| Pressure Rating | Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500 |
| Applications | High-temperature chemical processing, petrochemical industries, power generation |
| Manufacturing | Machined, heat-treated |
| Advantages | High-temperature strength, resistance to intergranular corrosion, smooth flow transition |
| Ordering Information | Specify pipe sizes, pressure class, and connection type |
| Suppliers | McMaster-Carr, Grainger, Penn Stainless Products |
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