Zeron Fastners
SS 321 Elbows
SS 321 Elbows are vital pipe fittings used to change the direction of a piping run, typically at 90° or 45° angles. These fittings are manufactured from Stainless Steel Grade 321, a high-performance austenitic alloy stabilized with Titanium. The Titanium prevents the formation of chromium carbides, which ensures the elbow retains its full resistance to intergranular corrosion (weld decay) after the welding process or during continuous exposure to high operating temperatures (up to 850°C). Zeron Fasteners manufactures and supplies robust SS 321 Elbows (often conforming to ASTM A403 WP321) in both long radius (LR) and short radius (SR) configurations. They are indispensable in critical, high-heat applications like aircraft exhaust systems, heat exchangers, and chemical processing lines where joint integrity and thermal stability are essential for safety and reliability.
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SS 321 Elbows Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 |
| Manganese (Mn) | 2.00 |
| Silicon (Si) | 1.00 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | 5 x C – 0.70 |
| Phosphorus (P) | 0.045 |
| Sulfur (S) | 0.030 |
Note: The Titanium content is five times the Carbon content minimum, up to a maximum of 0.70%.
SS 321 Elbows Mechanical Properties
| Property | Value (Typical) |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength (0.2% Offset) | 205 MPa |
| Elongation in 50mm | 35 % |
| Hardness (HB) | 217 max |
| Maximum Service Temperature | 850°C |