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ACI-ASTM CF8M Steel vs. SAE-AISI S1 Steel

Both ACI-ASTM CF8M steel and SAE-AISI S1 steel are iron alloys. They have 68% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8M steel and the bottom bar is SAE-AISI S1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 540
690 to 1840

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Melting Completion (Liquidus), °C 1440
1500
Melting Onset (Solidus), °C 1400
1450
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
41
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 19
8.0
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.8
2.6
Embodied Energy, MJ/kg 53
37
Embodied Water, L/kg 160
56

Common Calculations

PREN (Pitting Resistance) 28
5.9
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
24 to 64
Strength to Weight: Bending, points 19
22 to 42
Thermal Diffusivity, mm2/s 4.3
11
Thermal Shock Resistance, points 12
21 to 56

Alloy Composition

Carbon (C), % 0 to 0.080
0.4 to 0.55
Chromium (Cr), % 18 to 21
1.0 to 1.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 60.3 to 71
91.6 to 96.7
Manganese (Mn), % 0 to 1.5
0.1 to 0.4
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 9.0 to 12
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0.15 to 1.2
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
1.5 to 3.0
Vanadium (V), % 0
0.15 to 0.3