Where CF8 is commonly considered
CF8 is used for many general corrosion-resistant industrial castings, including pump, valve and equipment components. It can be a good fit where cleanability and corrosion resistance matter but the service environment does not justify a more highly alloyed grade.
Cast grade versus wrought 304
CF8 is an austenitic stainless casting grade commonly cross-referenced with the 304 family. The casting is controlled by the applicable cast-product specification, while wrought 304 is controlled by different standards. They should not be treated as automatically interchangeable simply because the family chemistry is similar.
Manufacturing and surface requirements
For investment-cast components, geometry, machining allowance, surface finish and any passivation or polishing requirements should be reviewed together. If the part includes sealing faces, threads, precision bores or pressure boundaries, those features should be identified on the drawing so the machining and inspection route can be planned correctly.
RFQ controls to define
- Exact CF8 grade and governing casting specification
- Service medium and operating temperature where relevant
- Machined datums, sealing faces and critical tolerances
- Surface finish, passivation or polishing requirements
- NDT, pressure-test or material-test requirements
- Certification and traceability documents
If chloride exposure or a more aggressive process environment is important, the material review should compare CF8 with molybdenum-bearing or duplex alternatives rather than assume 304-family stainless is sufficient.