Zeron Fastners
SS 310 Nuts
SS 310 Nuts are internal threaded fasteners, typically hexagonal in shape (Hex Nuts or Heavy Hex Nuts), designed to be mated with SS 310 bolts or stud bolts to secure a high-integrity connection. They are made from a high-chromium and high-nickel austenitic stainless steel (UNS S31000), a composition engineered specifically for high-temperature service. The material exhibits excellent resistance to oxidation and scaling up to 2000°F (1093°C) and maintains good mechanical properties, including creep strength, under prolonged thermal stress. This makes SS 310 nuts indispensable in environments subject to extreme heat and thermal cycling, such as heat exchangers, industrial furnace components, and refinery applications. Zeron Fasteners manufactures and supplies reliable SS 310 Nuts, adhering to stringent specifications like ASTM A194 (for nuts used with high-pressure/high-temperature bolting), ensuring they provide a secure and durable clamp load when paired with matching studs or bolts.
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SS 310 Nuts Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.25 |
| Manganese (Mn) | 2.00 |
| Silicon (Si) | 1.50 |
| Phosphorus (P) | 0.045 |
| Sulfur (S) | 0.030 |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 19.0 – 22.0 |
Note: The "310S" grade specifies Carbon max. at 0.08%, commonly supplied for better weldability.
SS 310 Nuts Mechanical Properties
| Property | Value (Typical) |
|---|---|
| Proof Load Stress | 515 MPa 75,000 psi |
| Rockwell Hardness | B95 |
| Brinell Hardness | 217 HB |
| Corrosion Oxidation Resistance | Excellent at high temperatures |
Based on typical values for SS 310 (UNS S31000) fasteners.