CB7Cu-1 (UNS J92180) chemical composition
Precipitation-hardening Cr-Ni-Cu cast steel (cast 17-4 PH) with niobium: solution treated, then aged to develop high strength while keeping stainless corrosion resistance. Used for pump shafts and impellers, valve components and highly stressed parts.
- Designation
- CB7Cu-1
- Material no.
- UNS J92180
- Standard
- ASTM A747
- Also known as
- ≈ 17-4 PH (cast)
- Family
- Stainless cast steel
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | – | 0.07 |
| SiSilicon | – | 1.00 |
| MnManganese | – | 0.70 |
| PPhosphorus | – | 0.035 |
| SSulphur | – | 0.03 |
| CrChromium | 15.5 | 17.7 |
| NiNickel | 3.60 | 4.60 |
| CuCopper | 2.50 | 3.20 |
| NNitrogen | – | 0.05 |
| NbNiobium | 0.15 | 0.35 |
| FeIron | remainder | |
Basis of values: Limits per ASTM A747.
We cast CB7Cu-1
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.