CF3M Cast Stainless Steel (Cast 316L)

ASTM A351 / CF3M. CF3M is the low-carbon cast equivalent of 316L stainless — its very low carbon prevents carbide precipitation, making it ideal for as-welded castings and intergranular-corrosion resistance.

Chemical composition (nominal wt %)

Element	%
Carbon (C)	≤0.03
Chromium (Cr)	17.0–21.0
Nickel (Ni)	9.0–13.0
Molybdenum (Mo)	2.0–3.0
Silicon (Si)	≤1.5

Mechanical properties

Property	Value
Tensile strength	485 MPa (70 ksi) min
Yield strength	205 MPa (30 ksi) min
Elongation	30% min
PREN	≈ 24–26

Density: 7.75 g/cm³ · Heat treatment: Solution annealed; the low carbon avoids sensitization during welding.

Cross-standard equivalents

Standard	Equivalent grade
EN	EN 1.4409
GB	ZG03Cr19Ni12Mo2
JIS	SCS16
Wrought	≈ AISI 316L

Equivalents by nominal class — confirm exact chemistry & spec for critical parts.

Typical applications

As-welded stainless castings
Chemical & pharma equipment
Chloride / acid service valves & pumps
Components requiring intergranular-corrosion resistance

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FAQ

What is the difference between CF8M and CF3M?

Both are cast 316-type stainless with molybdenum. CF3M has lower carbon (≤0.03%) to resist sensitization (carbide precipitation) during welding — choose CF3M for welded castings or where intergranular corrosion is a concern.