A351 CF3M
Data verifiedASTM A351 CF3M is the cast equivalent of 316L — molybdenum for chloride resistance plus ≤0.03% carbon so welded castings stay sensitization-free without re-annealing. The premium default for chemical, marine and pharmaceutical cast valves and pumps.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.03 |
| Si | ≤1.50 |
| Mn | ≤1.50 |
| P | ≤0.040 |
| S | ≤0.040 |
| Cr | 17.00–21.00 |
| Ni | 9.00–13.00 |
| 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 | 1.4409 (GX2CrNiMo19-11-2) |
| aisi | A351 CF3M |
| jis | SCS16A |
| gb | ZG00Cr17Ni14Mo2 (near) |
Compare side by side: A351 CF3M vs 316L
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 seawater valves, desalination and offshore castings, pharma and food process pumps.
Processing: As CF8M; weld repair with 316L-class filler; passivation after fabrication for best surface corrosion performance.
FAQ
- CF3M vs 316L on a valve order?
- Same alloy family, different product form: CF3M is the ASTM A351 casting grade for the body, 316L the wrought grade for plate/pipe/trim. A complete valve package normally carries both specs.
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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.