A351 CF8M
Data verifiedASTM A351 CF8M is the cast equivalent of 316 stainless — the molybdenum-bearing grade for chloride-bearing process streams, seawater-adjacent equipment and chemical valves where CF8 pits. It is the most common stainless casting grade in refinery and chemical service.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.08 |
| Si | ≤1.50 |
| Mn | ≤1.50 |
| P | ≤0.040 |
| S | ≤0.040 |
| Cr | 18.00–21.00 |
| Ni | 9.00–12.00 |
| Mo | 2.00–3.00 |
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 | ≥30% |
| Density | 7.90 g/cm³ |
Heat treatment
Solution anneal at ≥1040 °C and water quench (or rapid cool) per ASTM A351.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4408 (GX5CrNiMo19-11-2) |
| aisi | A351 CF8M |
| jis | SCS14A |
| gb | ZG0Cr17Ni12Mo2 (legacy, near) |
Compare side by side: A351 CF8M vs 316
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 petrochemical valves, seawater and brine pumps, pulp & paper and desalination castings.
Processing: As CF8; weld repair with 316L-class filler; control ferrite for hot-cracking resistance.
FAQ
- CF8M vs CF3M?
- CF3M is the low-carbon (≤0.03%) version for welded assemblies that cannot be solution-annealed after welding. For castings that ship solution-annealed, CF8M is the standard choice.
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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.