Stainless steel elbows made to ASTM A182 specifications are crucial for changing the direction of flow in piping systems. Common grades include F304, F316, F321, and F347, each with specific chemical compositions and mechanical properties. For instance, F304 stainless steel contains 18-20% chromium and 8-10.5% nickel, offering excellent corrosion resistance and high-temperature strength. These elbows come in various types, such as 45° and 90° angles, and are available in both long radius (LR) and short radius (SR) configurations. They are used in industries like oil and gas, petrochemical, chemical, power generation, and food processing. Manufactured through forging or rolling followed by heat treatment, these elbows are known for their durability and reliability in harsh conditions. When ordering, specify the nominal pipe size (NPS), schedule (Sch) for wall thickness, material grade, and type of elbow. Reputable suppliers include McMaster-Carr, Grainger, and Penn Stainless Products.
| Property | Details |
|---|---|
| Standard | ASTM A182 |
| Material | Stainless Steel |
| Common Grades | F304, F316, F321, F347 |
| Chemical Composition | Example for F304: |
| – Chromium (Cr): 18-20% | |
| – Nickel (Ni): 8-10.5% | |
| – Carbon (C): Max 0.08% | |
| – Manganese (Mn): Max 2% | |
| – Silicon (Si): Max 1% | |
| – Phosphorus (P): Max 0.045% | |
| – Sulfur (S): Max 0.03% |
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