ASTM A479 UNS S32205 Stud bolt Duplex 2205 ASTM A182 F60 Bolts
ASTM A479 UNS S32205 Stud Bolts (also known as Duplex 2205 Stud Bolts) are high-performance fasteners made from a duplex stainless steel combining both austenitic and ferritic microstructures. This balance provides exceptional strength, toughness, and corrosion resistance, particularly against chloride stress-corrosion cracking, pitting, and crevice corrosion.
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Duplex stainless 2205 (UNS S32205) is a chromium-nickel-molybdenum-nitrogen stainless steel..
UNS S32205 is a duplex grade with a ferritic-austenitic microstructure. The alloy consists of around 40-50% ferrite in the annealed condition. The duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades
Chemical composition of S32205 Stud bolt
| % | Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | 4.5 | 22 | 3 | – | – | – | 0.14 | – | – | Balance- |
| Max | 6.5 | 23 | 3.5 | 2 | 1 | 0.03 | 0.2 | 0.02 | 0.03 | – |
S32205 Stud bolt Mechanical Properties
| Tensile Strength, ksi | 0.2% Yield Strength, ksi | Elongation, % | Hardness [HRC] |
|---|---|---|---|
| 90 min | 65 min | 25 min | 293 max |
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Specifications
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ASTM A 182 / ASME SA 182
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Grade
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ASTM A182 GR.F60 S32205 |
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Standard
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DIN 931/912/975/976/2510, ISO 4014/4762, ASME B18.3/B18.2.1/B16.5/B18.2.3.6M and all International Standards
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Threads Configuration
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ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Standard: | ASME B18.2.1/ASME B18.2.2, DIN975/DIN976, |
| Diameter: | 1/4″-5″, M6-M125 |
| Length: | ≤9m or 30feet |
Standards & Designations
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Stud Bolt Material: ASTM A479 UNS S32205 / ASTM A276
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Forging Material: ASTM A182 F60
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Thread Standard: ASME B1.1 / ISO 261 / BS 3643
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Applicable Codes: ASME Sec. II / NACE MR0175 / ISO 15156
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Certification: EN 10204 Type 3.1 / 3.2 Mill Test Certificates
UNS S32205 Hex Nuts
Related Product Recommendations
To complement Duplex 2205 Stud Bolts, we also supply:
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Super Duplex 2507 Stud Bolts (ASTM A182 F53 / F55) – for extreme chloride and seawater resistance
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316L Stainless Steel Stud Bolts (ASTM A193 B8M Class 2) – for general corrosion service
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Inconel 625 Bolts (ASTM B446 UNS N06625) – for high-temperature and chemical process applications
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Hastelloy C276 Fasteners (ASTM B574 UNS N10276) – for strong acid and oxidizing media
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Incoloy 825 Bolts (ASTM B425 UNS N08825) – for sulfuric and phosphoric acid resistance
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