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SAE-AISI A8 Steel vs. Grade 360 Molybdenum

SAE-AISI A8 steel belongs to the iron alloys classification, while grade 360 molybdenum belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A8 steel and the bottom bar is grade 360 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
310
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 74
120
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
430 to 620

Thermal Properties

Latent Heat of Fusion, J/g 270
370
Specific Heat Capacity, J/kg-K 470
250
Thermal Expansion, µm/m-K 12
7.0

Otherwise Unclassified Properties

Density, g/cm3 7.9
10
Embodied Carbon, kg CO2/kg material 2.3
28
Embodied Energy, MJ/kg 31
330
Embodied Water, L/kg 73
360

Common Calculations

Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 25 to 68
12 to 17
Strength to Weight: Bending, points 22 to 44
12 to 16
Thermal Shock Resistance, points 22 to 62
14 to 21

Alloy Composition

Carbon (C), % 0.5 to 0.6
0 to 0.030
Chromium (Cr), % 4.8 to 5.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.5 to 91.9
0 to 0.010
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 1.2 to 1.7
99.9 to 100
Nickel (Ni), % 0 to 0.3
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0015
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.75 to 1.1
0 to 0.010
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 1.0 to 1.5
0