The F347/H ASTM LR (Long Radius) Elbow is a crucial fitting in piping systems, designed to change the direction of flow while maintaining a smooth transition and reducing turbulence. Made from stainless steel grades F347 and F347H, this elbow offers excellent resistance to intergranular corrosion and enhanced mechanical strength at high temperatures. The niobium in the alloy stabilizes it against carbide precipitation, making it suitable for high-temperature service. The long radius design minimizes pressure drop and is ideal for applications in the chemical, petrochemical, and power generation industries. The higher carbon content in F347H improves its high-temperature performance, ensuring reliability and durability 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 | Long Radius (LR) Elbow |
| Radius | 1.5 times the pipe diameter |
| Angle | 45°, 90°, 180° |
| Connection Type | Butt-weld |
| 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, angle, pressure class, and connection type |
| Suppliers | McMaster-Carr, Grainger, Penn Stainless Products |
Reviews
Clear filtersThere are no reviews yet.