If you are searching for high-quality Super Duplex UNS S32750 seamless pipes in stock, Gnee is your trusted partner. With over 18 years of experience in supplying stainless steel and duplex steel products, we ensure fast delivery, competitive prices, and guaranteed quality. Mail:es@gescosteel.com
Below is the technical dossier our lab releases with every heat, ensuring compliance beyond the standard.
1. Chemical (wt %, ladle analysis)
Cr 25.0–26.5 | Ni 6.0–7.0 | Mo 3.5–4.5 | N 0.24–0.32 | PREN ≥ 42.0
2. Mechanical envelope (RT, longitudinal)
Rp0.2 ≥ 550 MPa | Rm 800–1 000 MPa | A ≥ 25 % | Kv (-46 °C) ≥ 45 J
3. Corrosion resistance
ASTM G48 Method A pitting < 1 g m⁻² after 24 h @ 50 °C
ASTM G48 Method C critical crevice temperature ≥ 80 °C
4. Microstructure control
ASTM E562 ferrite 45–55 %, ASTM E112 grain size 6–8, free from detrimental σ, χ, α′ phases (verified via SEM/EDS)
5. Dimensional & NDT protocol
• OD tolerance ±0.5 %, wall ±10 %
• 100 % UT (ASTM E213) + 100 % ET (ASTM E571)
• Hydrostatic 1.5× design pressure, 10 s hold
6. Documentation bundle
• EN 10204 3.2 with DNV stamp
• Heat chart, PMI map, Charpy curves, G48 corrosion report
Current ex-stock: 40 t random 12 m lengths, plain ends, ready for immediate pickling/passivation or 3LPP coating on request.
Super Duplex UNS S32750 Product Specifications (Typical Range)
| Specification | Details |
|---|---|
| Grade | Super Duplex UNS S32750 (1.4410 / F53) |
| Standards | ASTM A790 / ASME SA790 / EN 10216-5 |
| Outside Diameter | 6mm – 610mm |
| Wall Thickness | 0.5mm – 50mm |
| Length | 5.8m, 6m, or customized |
| Surface Finish | Annealed, pickled, polished |
| Packaging | Standard export seaworthy packing with moisture-proof protection |
