Super Duplex UNS S32750 Nuts
The Super Duplex UNS S32750 Nut is a specialized, high-performance fastener designed for the most demanding industrial applications, often paired with matching stud bolts or hex bolts in critical flange joints. The UNS S32750 grade, often known commercially as Super Duplex 2507 or SAF 2507, is a stainless steel alloy characterized by a dual-phase microstructure (austenite and ferrite) that provides an exceptional combination of high mechanical strength and outstanding resistance to corrosion, especially pitting and crevice corrosion in chloride-rich environments like seawater. Manufactured by Zeron Fasteners, these nuts conform to high standards, typically ASTM A194 Grade 8S, ensuring they can withstand high-pressure, high-temperature service and match the robust performance of Super Duplex bolting systems.
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Super Duplex UNS S32750 Nuts Manufacturing Specification
| Standard |
ASME B18.2.2, DIN 934, ISO 4032 |
| Material Grade |
Super Duplex UNS S32750 (F53, SAF 2507) |
| Applicable Specs |
ASTM A194 or A194M (Grade 8S), NACE MR0175 |
| Size Range |
1/4 inch to 4 inches (M6 to M100) |
| Type |
Heavy Hex Nut, Hex Nut, Coupling Nut |
| Thread |
UNC, 8UN, Metric Coarse or Fine |
Super Duplex UNS S32750 Nuts Chemical Composition
| Element |
Content (%) |
| Carbon (C) |
0.030 max |
| Chromium (Cr) |
24.0 – 26.0 |
| Nickel (Ni) |
6.0 – 8.0 |
| Molybdenum (Mo) |
3.0 – 5.0 |
| Nitrogen (N) |
0.24 – 0.32 |
| Manganese (Mn) |
1.20 max |
| Silicon (Si) |
0.80 max |
| Copper (Cu) |
0.50 max |
Super Duplex UNS S32750 Nuts Mechanical Properties
| Property |
Value |
| Tensile Strength (min) |
750 MPa (109 ksi) |
| Yield Strength (min) |
550 MPa (80 ksi) |
| Hardness (Brinell max) |
310 HBW |
| Elongation (min) |
15% |
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