Zeron Fastners
SS 321 Hex Bolts
An SS 321 Hex Bolt is a standard six-sided head fastener manufactured from Stainless Steel Grade 321. This austenitic alloy is stabilized with the addition of Titanium (Ti), which effectively prevents intergranular corrosion when the material is exposed to sensitizing temperatures (425°C to 850°C), typically encountered during welding or operation. The bolt’s strength and design make it perfect for creating durable, non-permanent joints. Zeron Fasteners manufactures and supplies high-quality SS 321 Hex Bolts for applications where exposure to corrosive environments at elevated temperatures is a concern, such as in aircraft piston engine manifolds, exhaust stacks, furnace parts, and boiler tube supports, guaranteeing reliable, long-lasting performance.
Related Products
SS 321 Hex Bolts 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 Hex Bolts Mechanical Properties
| Property | Value (Typical) |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength (0.2% Offset) | 205 MPa |
| Elongation in 50mm | 35 % |
| Hardness (HB) | 217 |
| Maximum Service Temperature | 850°C |