Grade 365 Molybdenum vs. AISI 440B Stainless Steel

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while AISI 440B stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is grade 365 molybdenum and the bottom bar is AISI 440B stainless steel.

Grade 365 Molybdenum AISI 440B (S44003) 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, %		3.0 to 18

Poisson's Ratio		0.31
Poisson's Ratio		0.28

Shear Modulus, GPa		120
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		740 to 1930

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		430 to 1860

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		2.2

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		31

Embodied Water, L/kg		360
Embodied Water, L/kg		120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		37
Resilience: Ultimate (Unit Rupture Work), MJ/m³		57 to 110

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		27 to 70

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		24 to 45

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		27 to 70

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0.75 to 1.0

Chromium (Cr), %		0
Chromium (Cr), %		16 to 18

Iron (Fe), %		0 to 0.010
Iron (Fe), %		78.2 to 83.3

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

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		0 to 0.75

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

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 0.015