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SAE-AISI 5155 Steel vs. Grade 363 Molybdenum

SAE-AISI 5155 steel belongs to the iron alloys classification, while grade 363 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5155 steel and the bottom bar is grade 363 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
310
Elongation at Break, % 21
6.2 to 11
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 73
120
Tensile Strength: Ultimate (UTS), MPa 620
580 to 720
Tensile Strength: Yield (Proof), MPa 380
350 to 620

Thermal Properties

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

Otherwise Unclassified Properties

Density, g/cm3 7.8
10
Embodied Carbon, kg CO2/kg material 1.4
28
Embodied Energy, MJ/kg 19
330
Embodied Water, L/kg 49
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
43 to 57
Resilience: Unit (Modulus of Resilience), kJ/m3 380
200 to 630
Stiffness to Weight: Axial, points 13
17
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 22
16 to 20
Strength to Weight: Bending, points 21
15 to 17
Thermal Shock Resistance, points 20
19 to 24

Alloy Composition

Carbon (C), % 0.51 to 0.59
0.010 to 0.030
Chromium (Cr), % 0.7 to 0.9
0
Iron (Fe), % 97.2 to 97.9
0 to 0.010
Manganese (Mn), % 0.7 to 0.9
0
Molybdenum (Mo), % 0
99.3 to 99.5
Nickel (Ni), % 0
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0030
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.010
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0.4 to 0.55
Zirconium (Zr), % 0
0.060 to 0.12