CK3MCuN (UNS J93254) chemical composition
6Mo super-austenitic grade with nitrogen and copper (UNS J93254), comparable to 254 SMO (wrought) and 1.4557 GX2CrNiMoCuN20-18-6 (EN cast). Designed for seawater, brine and chloride-bearing chemical service where 316-type grades pit.
- Designation
- CK3MCuN
- Material no.
- UNS J93254
- Standard
- ASTM A743 / A351
- Also known as
- ≈ 254 SMO / S31254 (wrought), ≈ 1.4557 GX2CrNiMoCuN20-18-6 (EN cast), 6Mo
- Family
- Stainless cast steel
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | – | 0.025 |
| SiSilicon | – | 1.00 |
| MnManganese | – | 1.20 |
| PPhosphorus | – | 0.045 |
| SSulphur | – | 0.01 |
| CrChromium | 19.5 | 20.5 |
| NiNickel | 17.5 | 19.5 |
| MoMolybdenum | 6.00 | 7.00 |
| CuCopper | 0.50 | 1.00 |
| NNitrogen | 0.18 | 0.24 |
| FeIron | remainder | |
Basis of values: Limits per ASTM A743 / A351.
We cast CK3MCuN
Tsitouras Foundry supplies stainless steel sand castings – and centrifugal castings for bushings and sleeves – with the heat treatment each grade requires (solution annealing; quenching and tempering for martensitic grades), spectrometric chemical analysis, mechanical testing and NDT, EN 10204 3.1 certificates, and CNC machining to the finished part in the group's own machine shop.
- 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.