CK20 (UNS J94202) chemical composition
25Cr-20Ni grade, cast counterpart of AISI 310 (UNS J94202). The high chromium and nickel contents give oxidation and scaling resistance at elevated temperature as well as corrosion resistance, for furnace and hot-process parts.
- Designation
- CK20
- Material no.
- UNS J94202
- Standard
- ASTM A743
- Also known as
- ≈ AISI 310 (cast), 25Cr-20Ni
- Family
- Stainless cast steel
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | – | 0.20 |
| SiSilicon | – | 2.00 |
| MnManganese | – | 2.00 |
| PPhosphorus | – | 0.04 |
| SSulphur | – | 0.04 |
| CrChromium | 23.0 | 27.0 |
| NiNickel | 19.0 | 22.0 |
| FeIron | remainder | |
Basis of values: Limits per ASTM A743.
We cast CK20
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.