Grade 365 Molybdenum vs. AISI 420 Stainless Steel

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while AISI 420 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is grade 365 molybdenum and the bottom bar is AISI 420 stainless steel.

Grade 365 Molybdenum AISI 420 (S42000) Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		310
Elastic (Young's, Tensile) Modulus, GPa		190

Elongation at Break, %		6.3
Elongation at Break, %		8.0 to 15

Poisson's Ratio		0.31
Poisson's Ratio		0.28

Shear Modulus, GPa		120
Shear Modulus, GPa		76

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		690 to 1720

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g		370
Latent Heat of Fusion, J/g		280

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		7.0
Thermal Expansion, µm/m-K		10

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		28
Embodied Carbon, kg CO₂/kg material		2.0

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		28

Embodied Water, L/kg		360
Embodied Water, L/kg		100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		37
Resilience: Ultimate (Unit Rupture Work), MJ/m³		88 to 130

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		380 to 4410

Stiffness to Weight: Axial, points		17
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		25 to 62

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		22 to 41

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		25 to 62

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0.15 to 0.4

Chromium (Cr), %		0
Chromium (Cr), %		12 to 14

Iron (Fe), %		0 to 0.010
Iron (Fe), %		82.3 to 87.9

Manganese (Mn), %		0
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		0 to 0.5

Nickel (Ni), %		0 to 0.0020
Nickel (Ni), %		0 to 0.75

Nitrogen (N), %		0 to 0.0020
Nitrogen (N), %		0

Oxygen (O), %		0 to 0.0015
Oxygen (O), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0 to 0.010
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.030