Duplex 2205 Stud BoltASTM A276 · ASME B18.31.2 · Manufacturer, stockist & exporter, India
UNS S32205 / S31803 · W.Nr 1.4462
A Duplex 2205 stud bolt is a fully threaded rod supplied with two heavy hex nuts, made from Duplex 2205 to ASTM A276 / A479. Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- ASTM A276
- ASME B18.31.2
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Duplex 2205 Stud Bolt?
- What it is
- A fully threaded rod supplied with two heavy hex nuts
- Material
- ASTM A276 / A479
- Dimensions
- ASME B18.31.2 · B16.5 bolting tables
- Grade
- Duplex 2205 · UNS S32205
- Best at
- Strength with chloride resistance at a stainless-steel budget
Duplex 2205 Stud Bolt Specification
| Product | Duplex 2205 Stud Bolt |
|---|---|
| Material standard | ASTM A276 / A479 |
| Dimensional standard | ASME B18.31.2 · B16.5 bolting tables |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Stud Bolt
Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- Fully threaded, with two heavy hex nuts
- Length per ASME B16.5 flange class
- UNC up to 1", UN-8 above
More on choosing: Stud bolt guide.
Duplex 2205 Stud Bolt: Why 2205 for stud bolts
Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables. In Duplex 2205, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Duplex fasteners add strength in chloride service. Duplex 2205 is picked for strength with chloride resistance at a stainless-steel budget. |
|---|---|
| Typical service | Oil & gas — Flowlines, manifolds and topside piping. |
| Bolting | B7 (coated), B8M or duplex studs, as the project specifies |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Duplex 2205 Stud Bolt Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 22.0 – 23.0 |
| Nickel | 4.5 – 6.5 |
| Molybdenum | 3.0 – 3.5 |
| Nitrogen | 0.14 – 0.20 |
| Carbon | 0.030 max |
| Manganese | 2.00 max |
| Silicon | 1.00 max |
| Phosphorus | 0.030 max |
Duplex 2205 Stud Bolt Mechanical Properties
| Solution-annealed plate & sheet | Value |
|---|---|
| Tensile strength | 655 MPa · 95 ksi |
| Yield strength 0.2% | 450 MPa · 65 ksi |
| Elongation | 25% |
| Hardness | 293 HB max |
Full chemistry, properties and equivalents are on the Duplex 2205 grade page.
Standards on this page
Other Duplex 2205 fasteners
Duplex 2205 Stud Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiDuplex 2205 Stud Bolt — questions buyers ask
How is stud bolt length measured?
From first thread to first thread, excluding chamfered points, as tabulated in ASME B16.5.
What nut is used with Duplex 2205 stud bolts?
A nut in the same alloy, machined from ASTM A276 / A479 bar, unless the project specifies otherwise.
Which standard covers Duplex 2205 stud bolts?
The material is ASTM A276 / A479; dimensions follow ASME B18.31.2 · B16.5 bolting tables. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Duplex 2205 stud bolt?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
Can you supply Duplex 2205 stud bolts to NACE MR0175?
Yes. Duplex 2205 is listed in NACE MR0175 / ISO 15156-3 within its limits; state NACE compliance on the order and it is confirmed on the certificate.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026