Grade 361 Molybdenum vs. SAE-AISI 4340M Steel

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while SAE-AISI 4340M steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is grade 361 molybdenum and the bottom bar is SAE-AISI 4340M steel.

Grade 361 Molybdenum SAE-AISI 4340M (300M, K44220) Silicon-Vanadium 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, %		6.0

Poisson's Ratio		0.31
Poisson's Ratio		0.29

Shear Modulus, GPa		120
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		2340

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		1240

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		13

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		1.9

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		26

Embodied Water, L/kg		360
Embodied Water, L/kg		55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		37
Resilience: Ultimate (Unit Rupture Work), MJ/m³		120

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		4120

Stiffness to Weight: Axial, points		17
Stiffness to Weight: Axial, points		13

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

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		84

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		51

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		70

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0.38 to 0.43

Chromium (Cr), %		0
Chromium (Cr), %		0.7 to 1.0

Iron (Fe), %		0 to 0.010
Iron (Fe), %		93.3 to 94.8

Manganese (Mn), %		0
Manganese (Mn), %		0.65 to 0.9

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		0.35 to 0.45

Nickel (Ni), %		0 to 0.0050
Nickel (Ni), %		1.7 to 2.0

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

Oxygen (O), %		0 to 0.0070
Oxygen (O), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.012

Silicon (Si), %		0 to 0.010
Silicon (Si), %		1.5 to 1.8

Sulfur (S), %		0
Sulfur (S), %		0 to 0.012

Vanadium (V), %		0
Vanadium (V), %		0.050 to 0.1