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Duplex Steel 2205 stud bolts are robust fasteners crafted from duplex stainless steel, which boasts a well-balanced mix of austenite and ferrite. This unique dual-phase structure not only delivers impressive mechanical strength but also offers outstanding corrosion resistance and durability, making these bolts perfect for tough environments like chemical plants, marine settings, and industrial applications. They stand up remarkably well against pitting, crevice corrosion, and stress corrosion cracking caused by chlorides, ensuring they perform reliably in critical situations.
Typically, Duplex Steel 2205 stud bolts contain about 22–25% chromium, 4–7% nickel, 2–3% molybdenum, and nitrogen, all of which boost their mechanical strength and resistance to corrosion. They can achieve a tensile strength of around 620–850 MPa and a yield strength of about 450–550 MPa, while also exhibiting excellent toughness, ductility, and fatigue resistance. The duplex microstructure contributes to their thermal stability and resistance to intergranular corrosion, making these bolts dependable even under high-pressure and high-temperature conditions.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Duplex Steel Stud Bolts 2205
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 479 / 479 |
3 mm
to
200 mm
|
M02 to M30
|
| Duplex Steel Stud Bolts 2205 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
|
Grade |
Tensile Strength
(MPa) min |
Elongation
(% in 50mm) |
Yield Strength
0.2% Proof (MPa) min |
Hardness
Rockwell C (HR C) |
|---|---|---|---|---|
|
UNS-S 32205 |
621 |
25 |
448 |
21 max |
At Themban Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel 2205 Stud Bolts in Cape Town , South Africa, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Cape Town, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
You’ll find Duplex Steel 2205 stud bolts commonly used in pipelines, pressure vessels, heat exchangers, offshore platforms, and structural assemblies that face exposure to seawater, acids, and other harsh substances. Their blend of high strength, corrosion resistance, and durability guarantees secure fastening, a long service life, and minimal maintenance in demanding industrial and marine environments. These stud bolts create reliable and long-lasting joints for both structural and process-critical applications.