Zeron Fastners
SS 321 Springs
SS 321 Springs are crucial components designed to store and release mechanical energy, providing critical functions such as absorbing shock, maintaining constant force, or actuating components. The range includes Compression Springs, Extension Springs, and Torsion Springs. These springs are precision-formed using Stainless Steel Grade 321, an austenitic alloy stabilized with Titanium. This element prevents the formation of chromium carbides, safeguarding the spring against intergranular corrosion, which is vital as springs often operate in the sensitization temperature range (425°C to 850°C) under mechanical stress. Zeron Fasteners manufactures and supplies high-performance SS 321 Springs that are essential for critical applications in furnace damper controls, thermal expansion compensation systems, aerospace engines, and chemical processing equipment, guaranteeing reliable performance and high fatigue life under extreme heat and corrosive load.
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SS 321 Springs 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 Springs Mechanical Properties
| Property | Value (Typical) |
|---|---|
| Maximum Service Temperature | 850°C |
| Modulus of Elasticity (E) | 193 GPa |
| Modulus of Rigidity (G) | 77 GPa |
| Tensile Strength (Wire) | Varies by cold work level |
| Spring Index | Varies by design |