The ASTM A182 F347 threaded/screwed union is an essential fitting used to connect two pipes or tubes, allowing for easy disconnection and reassembly in a piping system. Constructed from F347 stainless steel, this union provides superior resistance to intergranular corrosion, thanks to the stabilization achieved through the addition of columbium (niobium). This makes it particularly suitable for high-temperature and corrosive environments. The union design features male and female threaded ends that enable easy and secure connections without the need for welding. The robust construction ensures a leak-proof seal and reliable performance under high pressure. Common applications include petrochemical, chemical processing, and aerospace industries, where durability and ease of maintenance are crucial.
| Property | Details |
|---|---|
| Standard | ASTM A182 |
| Material | Stainless Steel F347 |
| Chemical Composition | Chromium (Cr): 17-19%<br>Nickel (Ni): 9-13%<br>Columbium (Cb): 10 x C%<br>Carbon (C): Max 0.08%<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 520 MPa (75,300 psi)<br>Yield Strength: Min 210 MPa (30,500 psi)<br>Elongation: Min 30% |
| Type | Threaded/Screwed Union |
| Connection Type | Threaded/Screwed |
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