Grade 365 Molybdenum vs. S31655 Stainless Steel

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while S31655 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 S31655 stainless steel.

Grade 365 Molybdenum UNS S31655 Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		310
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		6.3
Elongation at Break, %		39

Poisson's Ratio		0.31
Poisson's Ratio		0.28

Shear Modulus, GPa		120
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		710

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		350

Thermal Properties

Latent Heat of Fusion, J/g		370
Latent Heat of Fusion, J/g		290

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		16

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		28
Embodied Carbon, kg CO₂/kg material		3.3

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		46

Embodied Water, L/kg		360
Embodied Water, L/kg		160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		37
Resilience: Ultimate (Unit Rupture Work), MJ/m³		230

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		310

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

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		23

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		16

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0 to 0.030

Chromium (Cr), %		0
Chromium (Cr), %		19.5 to 21.5

Copper (Cu), %		0
Copper (Cu), %		0 to 1.0

Iron (Fe), %		0 to 0.010
Iron (Fe), %		63.2 to 71.9

Manganese (Mn), %		0
Manganese (Mn), %		0 to 2.0

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		0.5 to 1.5

Nickel (Ni), %		0 to 0.0020
Nickel (Ni), %		8.0 to 9.5

Nitrogen (N), %		0 to 0.0020
Nitrogen (N), %		0.14 to 0.25

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

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.045

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

Sulfur (S), %		0
Sulfur (S), %		0 to 0.015