Super Duplex 2507 U-boltASTM A276 · MSS SP-58 / manufacturer standard · Manufacturer, stockist & exporter, India
UNS S32750 · W.Nr 1.4410
A Super Duplex 2507 u-bolt is a U-shaped bolt for clamping pipes to supports, made from Super Duplex 2507 to ASTM A276 / A479. U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg.
- ASTM A276
- MSS SP-58 / manufacturer standard
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Super Duplex 2507 U-bolt?
- What it is
- A U-shaped bolt for clamping pipes to supports
- Material
- ASTM A276 / A479
- Dimensions
- MSS SP-58 / manufacturer standard
- Grade
- Super Duplex 2507 · UNS S32750
- Best at
- Seawater and high-chloride service where strength also matters
Super Duplex 2507 U-bolt Specification
| Product | Super Duplex 2507 U-bolt |
|---|---|
| Material standard | ASTM A276 / A479 |
| Dimensional standard | MSS SP-58 / manufacturer standard |
| 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 an U-bolt
U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg.
- Sized to pipe NPS
- With nuts and plates
- Matching or isolated material
More on choosing: U-bolt guide.
Super Duplex 2507 U-bolt: Why 2507 for u-bolts
U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg. In Super Duplex 2507, 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. Super Duplex 2507 is picked for seawater and high-chloride service where strength also matters. |
|---|---|
| Typical service | Offshore & subsea — Seawater injection, firewater and subsea 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 |
Super Duplex 2507 U-bolt Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 24.0 – 26.0 |
| Nickel | 6.0 – 8.0 |
| Molybdenum | 3.0 – 5.0 |
| Nitrogen | 0.24 – 0.32 |
| Copper | 0.50 max |
| Carbon | 0.030 max |
| Manganese | 1.20 max |
| Silicon | 0.80 max |
Super Duplex 2507 U-bolt Mechanical Properties
| Solution-annealed plate & sheet | Value |
|---|---|
| Tensile strength | 795 MPa · 116 ksi |
| Yield strength 0.2% | 550 MPa · 80 ksi |
| Elongation | 15% |
| Hardness | 310 HB max |
Full chemistry, properties and equivalents are on the Super Duplex 2507 grade page.
Standards on this page
Other Super Duplex 2507 fasteners
Super Duplex 2507 U-bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSuper Duplex 2507 U-bolt — questions buyers ask
Should U-bolts match the pipe material?
Use the same alloy, or an isolating sleeve, to avoid galvanic corrosion between pipe and bolt.
What nut is used with Super Duplex 2507 u-bolts?
A nut in the same alloy, machined from ASTM A276 / A479 bar, unless the project specifies otherwise.
Which standard covers Super Duplex 2507 u-bolts?
The material is ASTM A276 / A479; dimensions follow MSS SP-58 / manufacturer standard. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Super Duplex 2507 u-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 Super Duplex 2507 u-bolts to NACE MR0175?
Yes. Super Duplex 2507 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