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SAE-AISI S2 Steel vs. ACI-ASTM CK20 Steel

Both SAE-AISI S2 steel and ACI-ASTM CK20 steel are iron alloys. They have 54% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S2 steel and the bottom bar is ACI-ASTM CK20 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
78
Tensile Strength: Ultimate (UTS), MPa 670 to 1940
530

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
14
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
25
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
4.4
Embodied Energy, MJ/kg 30
62
Embodied Water, L/kg 49
190

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 69
19
Strength to Weight: Bending, points 22 to 44
19
Thermal Diffusivity, mm2/s 12
3.7
Thermal Shock Resistance, points 23 to 68
13

Alloy Composition

Carbon (C), % 0.4 to 0.55
0 to 0.2
Chromium (Cr), % 0
23 to 27
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 96 to 98.1
46.7 to 58
Manganese (Mn), % 0.3 to 0.5
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.6
0 to 0.5
Nickel (Ni), % 0 to 0.3
19 to 22
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.9 to 1.2
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0 to 0.5
0