Zeron Fastners
Duplex and Super Duplex UNS S31803 U-Bolts and J-Bolts
Duplex and Super Duplex UNS S31803 U-Bolts and J-Bolts are bent fasteners manufactured from high-strength Duplex Stainless Steel (Alloy 2205 / UNS S31803). U-Bolts are typically shaped like the letter 'U' with threads on both ends, primarily used for clamping pipes or round bar stock to structural supports. J-Bolts are shaped like the letter 'J' with a threaded end and a hook, used for anchoring to concrete or supporting components. The Duplex S31803 material ensures these components provide superior resistance to corrosion, especially chloride-induced stress cracking, making them essential for securing pipelines in marine, oil and gas, and wastewater treatment industries where reliability under severe environmental conditions is mandatory. Zeron Fastners supplies these products to exact specifications for critical clamping and anchoring needs.
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Duplex and Super Duplex UNS S31803 U-Bolts and J-Bolts Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.030 max |
| Sulfur (S) | 0.020 max |
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 |
Duplex and Super Duplex UNS S31803 U-Bolts and J-Bolts Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (min) | 620 MPa (90 ksi) |
| Yield Strength (0.2% Offset min) | 450 MPa (65 ksi) |
| Elongation in 4D (min) | 25% |
| Hardness (Brinell max) | 290 HB |