GX2CrNiMoN26-7-4 (1.4469) chemical composition
Super duplex cast steel supplied solution annealed and water quenched (+AT). Used for seawater and brackish-water pumps, valves and fittings in offshore, desalination and chemical plants where higher strength and chloride corrosion resistance than standard duplex are required.
- Designation
- GX2CrNiMoN26-7-4
- Material no.
- 1.4469
- Standard
- EN 10283
- Also known as
- Cast super duplex 25Cr, ≈ ASTM A890 / A995 Grade 5A CE3MN (UNS J93404), ≈ 1.4410 X2CrNiMoN25-7-4 (wrought), ≈ UNS S32750 / 2507 (wrought)
- Family
- Duplex & super duplex stainless cast steel
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | – | 0.03 |
| SiSilicon | – | 1.00 |
| MnManganese | – | 1.00 |
| PPhosphorus | – | 0.035 |
| SSulphur | – | 0.025 |
| CrChromium | 25.0 | 27.0 |
| NiNickel | 6.00 | 8.00 |
| MoMolybdenum | 3.00 | 5.00 |
| CuCopper | – | 1.30 |
| NNitrogen | 0.12 | 0.22 |
| FeIron | remainder | |
Basis of values: Limits per EN 10283.
We cast GX2CrNiMoN26-7-4
Tsitouras Foundry casts duplex and super duplex pump casings, impellers and process components, with heat treatment, 3D-printed sand cores for complex passages, CNC machining and dynamic balancing in the group's own shops. Every heat is analysed by OES and supplied with an EN 10204 3.1 certificate.
- Sand casting at our foundry in Mandra, Attica; centrifugal casting for bushings, sleeves and liners
- Heat treatment at the foundry (water, oil or air quench); CNC machining in our machine shop in Perama
- Spectrometer analysis of every heat, mechanical testing and NDT
- EN 10204 3.1 inspection certificates; ISO 9001 (both plants) and ISO 14001 (foundry) certified
Other grades in this family
For information only, without warranty: limits per the cited standard or, where stated, typical or house values; ≈ marks a comparable grade, not an equivalent. The current edition of the standard, the purchase order and the drawing govern.