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SAE-AISI M4 Steel vs. Grade 363 Molybdenum

SAE-AISI M4 steel belongs to the iron alloys classification, while grade 363 molybdenum belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is grade 363 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
310
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 76
120
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
580 to 720

Thermal Properties

Latent Heat of Fusion, J/g 260
370
Specific Heat Capacity, J/kg-K 440
250
Thermal Expansion, µm/m-K 12
7.0

Otherwise Unclassified Properties

Density, g/cm3 8.3
10
Embodied Carbon, kg CO2/kg material 14
28
Embodied Energy, MJ/kg 210
330
Embodied Water, L/kg 110
360

Common Calculations

Stiffness to Weight: Axial, points 13
17
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 26 to 72
16 to 20
Strength to Weight: Bending, points 23 to 45
15 to 17
Thermal Shock Resistance, points 24 to 68
19 to 24

Alloy Composition

Carbon (C), % 1.3 to 1.4
0.010 to 0.030
Chromium (Cr), % 3.8 to 4.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
0 to 0.010
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.3 to 5.5
99.3 to 99.5
Nickel (Ni), % 0 to 0.3
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0030
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0 to 0.010
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.4 to 0.55
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0
Zirconium (Zr), % 0
0.060 to 0.12