CG8M (UNS J93000) chemical composition
Higher-molybdenum counterpart of 317 (UNS J93000). The extra Mo over CF8M improves resistance to pitting and to sulphur-bearing and acidic media, e.g. in pulp-and-paper and chemical process pumps and valves.
- Designation
- CG8M
- Material no.
- UNS J93000
- Standard
- ASTM A743
- Also known as
- ≈ AISI 317 (cast)
- Family
- Stainless cast steel
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | – | 0.08 |
| SiSilicon | – | 1.50 |
| MnManganese | – | 1.50 |
| PPhosphorus | – | 0.04 |
| SSulphur | – | 0.04 |
| CrChromium | 18.0 | 21.0 |
| NiNickel | 9.00 | 13.0 |
| MoMolybdenum | 3.00 | 4.00 |
| FeIron | remainder | |
Basis of values: Limits per ASTM A743.
We cast CG8M
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.