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

0.08% Max

0.08% Max

0.08% Max

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)

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© Alloy Casting Industries Ltd 2025

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© Alloy Casting Industries Ltd 2025

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© Alloy Casting Industries Ltd 2025