A351 CF8M
ASTM
A351 CF8M
ASME
SA351 CF8M
SAE
316
UNS -Cast
J92900
UNS -Wrought
S31600
Overview
ASTM A351 CF8M is a cast austenitic stainless steel commonly used for pressure-containing parts in corrosive and high-temperature environments. It is the cast equivalent of wrought AISI 316 stainless steel. The "CF8M" designation indicates the alloy's composition: "C" denotes corrosion resistance, "F" indicates the approximate location on the iron-chromium-nickel (FeCrNi) ternary diagram and indicates the iron, chromium, and nickel content of the alloy, "8" represents the maximum carbon content in the alloy, specifically 0.08%, and "M" designates the inclusion of molybdenum for enhanced pitting resistance.
Chemical Composition
Carbon
Manganese
1.50% Max
Silicon
1.50% Max
Phosphorus
0.04% Max
Sulfur
0.04% Max
Chromium
18.00 - 21.00%
Nickel
9.00 - 12.00%
Molybdenum
2.00 - 3.00%
Mechanical Properties
Yield Strength
30 ksi Min [205 MPa]
Tensile Strength
70 ksi Min [485 MPa]
Elongation at 2 in
30% Min
Hardeness
~150 to 190 HB (Brinell)
Physical Properties
Density
7.98 g/cm³
Melting Range
1370 – 1400 °C
Thermal Conductivity (100°C)
~16.2 W/m·K
Specific Heat Capacity (20°C)
500 J/kg·K
Electrical Resistivity (20°C)
~0.74 μΩ·m
Modulus of Elasticity
~193 GPa
Coefficient of Thermal Expansion
~16.0 × 10⁻⁶ /°C (20–100°C)
Resources
ASTM Standard
