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SAE-AISI S6 Steel vs. ACI-ASTM CF8C Steel

Both SAE-AISI S6 steel and ACI-ASTM CF8C steel are iron alloys. They have 71% 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 SAE-AISI S6 steel and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 670 to 1920
530

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 41
16
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
19
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.7
Embodied Energy, MJ/kg 33
53
Embodied Water, L/kg 56
150

Common Calculations

PREN (Pitting Resistance) 2.7
20
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 70
19
Strength to Weight: Bending, points 22 to 45
19
Thermal Diffusivity, mm2/s 11
4.3
Thermal Shock Resistance, points 22 to 64
11

Alloy Composition

Carbon (C), % 0.4 to 0.5
0 to 0.080
Chromium (Cr), % 1.2 to 1.5
18 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.8 to 94.7
61.8 to 73
Manganese (Mn), % 1.2 to 1.5
0 to 1.5
Molybdenum (Mo), % 0.3 to 0.5
0 to 0.5
Nickel (Ni), % 0
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 2.0 to 2.5
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.2 to 0.4
0