A351 CF8
Data verifiedASTM A351 CF8 is the cast equivalent of 304 stainless: the standard material for corrosion-resistant valve bodies, pump casings and process castings. Its composition window is deliberately a little wider than wrought 304 to suit casting practice, with a small controlled ferrite content for castability and weld soundness.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.08 |
| Si | ≤2.00 |
| Mn | ≤1.50 |
| P | ≤0.040 |
| S | ≤0.040 |
| Cr | 18.00–21.00 |
| Ni | 8.00–11.00 |
| Mo | ≤0.50 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | ≥485 MPa |
| Yield strength | ≥205 MPa |
| Elongation | ≥35% |
| Density | 7.90 g/cm³ |
Heat treatment
Solution anneal at ≥1040 °C and water quench (or rapid cool) per ASTM A351 — castings are supplied solution-annealed.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4308 (GX5CrNi19-10) |
| aisi | A351 CF8 |
| jis | SCS13A |
| gb | ZG0Cr18Ni9 (legacy, near) |
Compare side by side: A351 CF8 vs 304
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Chemical and food-process valves and pumps, marine castings, general corrosion-resistant pressure castings.
Processing: Cast and solution-anneal; machines like 304. Weld repairs with 308L-class filler are routine.
FAQ
- CF8 vs 304 — interchangeable?
- They are the cast/wrought pair for the same service and are routinely specified together (cast body, wrought trim). Chemistry windows differ slightly — CF8 runs to 21% Cr and 11% Ni — so coded work follows the product-form spec on the drawing.
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Ask for a quotationVisit NasteelSource: ASTM A351 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.