Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175 / ISO 15156-2
- NORSOK M-650 Qualified
- API 6A Certified
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
Super Duplex 2507 Flat Bar, UNS S32750
Super Duplex 2507 flat bar in UNS S32750 (EN 1.4410) is supplied as hot-rolled and edge-trimmed strip for keys, base plates, lifting eyes, structural shapes and weld-prep stock for fabricated valve bodies and pump casings. TorqBolt holds 2507 flat bar in widths 10 to 200 mm and thicknesses 3 to 80 mm at the Mumbai warehouse, with EN 10204 Type 3.1 mill certificates and Type 3.2 third-party-witnessed on request.
Flat bar follows ASTM A479 chemistry for designation S32750 and ASTM A276 dimensional rules for shapes. Heavier sections cross over to ASTM A182 grade F53 when ordered as forged billet. Sour-service certification per NACE MR0175 / ISO 15156-3 is available with controlled hardness and ferrite balance.
Super Duplex 2507 Flat Bar Size Range
| Width | Thickness | Length |
|---|---|---|
| 10 to 50 mm | 3 to 25 mm | 3.0 to 6.0 m random |
| 50 to 100 mm | 5 to 50 mm | 3.0 to 6.0 m random |
| 100 to 200 mm | 10 to 80 mm | 3.0 to 6.0 m random |
| Tolerance | Width and thickness per ASTM A484, edge condition mill-edge or trimmed | |
Super Duplex 2507 Flat Bar Chemistry
Per ASTM A479 designation S32750: 25Cr-7Ni-3.5Mo-0.3N. Copper is restricted to 0.50 max as residual, not intentional. PREN of 41 or higher.
| Element | Min % | Max % |
|---|---|---|
| Carbon | (no min) | 0.030 |
| Chromium | 24.0 | 26.0 |
| Nickel | 6.0 | 8.0 |
| Molybdenum | 3.0 | 5.0 |
| Nitrogen | 0.24 | 0.32 |
| Copper | (no min) | 0.50 max, residual, not intentional |
| Manganese | (no min) | 1.20 |
| Phosphorus | (no min) | 0.035 |
| Sulfur | (no min) | 0.020 |
Super Duplex 2507 Flat Bar Mechanical Properties
| Property | Minimum | Test Standard |
|---|---|---|
| Tensile strength | 800 MPa (116 ksi) | ASTM A370 |
| Yield strength | 550 MPa (80 ksi) | ASTM A370 |
| Elongation in 50 mm | 15 percent | ASTM A370 |
| Hardness | 32 HRC max bar, 28 HRC max NACE | NACE MR0175 |
| Charpy V-notch at minus 46 C | 45 J min | NORSOK M-630 |
| Ferrite content | 35 to 55 percent base | ASTM E562 |
Heat Treatment
Solution annealing at 1040 to 1100 degrees Celsius followed by water quench. Heavier sections (above 50 mm thick) are quenched in agitated water to drive the bar through the sigma-phase nose between 600 and 1000 degrees Celsius before precipitation can begin.
Cutting and Fabrication
- Plasma and abrasive water-jet cut clean. Oxy-fuel is not used on stainless.
- Saw cutting: bi-metal blades at 30 to 50 percent of carbon-steel speed, flood coolant.
- Cold forming: bend radius equal to or greater than 2 times thickness for cold bends; anneal heavy bends.
- Welding: ER2594 or ER2553 filler per AWS A5.9, heat input 0.5 to 2.5 kJ/mm, interpass below 150 degrees Celsius.
Super Duplex 2507 Flat Bar Applications
- Keys, splines and shaft pins for chloride pump and valve service
- Lifting eyes, padeyes and rigging hardware on offshore structures
- Base plates and gusset plates for pipe supports
- Strip stock for clamps, brackets and instrument panels
- Weld-fabricated valve bodies, pump casings and small pressure vessels
Related Products and Standards
- Super Duplex 2507 round bar
- Super Duplex 2507 square bar
- Super Duplex 2507 hex bar
- Super Duplex 2507 plate
- Super Duplex 2507 sheet
- ASTM A479 reference
Super Duplex 2507 Flat Bar FAQ
Which standards cover 2507 flat bar?
ASTM A479 (bar for pressure vessels), ASTM A276 (shapes), EN 10088-3 Werkstoff 1.4410, NORSOK M-630 (material data sheet) and NACE MR0175 / ISO 15156-3 for sour service.
What edge conditions are available?
Mill-edge for as-rolled bar and trimmed-edge (saw or shear) on order. Heavier sections above 25 mm typically ship mill-edge; lighter strip 3 to 12 mm is supplied trimmed for fabrication.
Can 2507 flat bar be cold-formed?
Yes, with a minimum bend radius of 2 times the thickness for transverse bends. Yield strength is high (550 MPa min), so bend force is roughly twice that of austenitic 316L. Heavy bends should be solution annealed after forming to recover ferrite balance.
Is 2507 flat bar suitable for sour service?
Yes, qualified per NACE MR0175 / ISO 15156-3 with 28 HRC max hardness and ferrite within 35 to 65 percent. The certificate states the application zone, H2S partial pressure and chloride limits when ordered with NACE compliance.
Does 2507 flat bar contain copper?
No, copper is not an intentional alloying element in UNS S32750. ASTM A479 permits 0.50 max as residual, not intentional. Copper-bearing super duplex grades are Zeron 100 (S32760) and Ferralium 255 (S32550), supplied separately.
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