Grade 361 Molybdenum vs. S21904 Stainless Steel

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while S21904 stainless steel belongs to the iron alloys. There are 20 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 361 molybdenum and the bottom bar is S21904 stainless steel.

Grade 361 Molybdenum UNS S21904 (XM-11) 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, %		17 to 51

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		700 to 1000

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		390 to 910

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		17

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		3.0

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		43

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		160 to 310

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		380 to 2070

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 36

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		23 to 29

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		15 to 21

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0 to 0.040

Chromium (Cr), %		0
Chromium (Cr), %		19 to 21.5

Iron (Fe), %		0 to 0.010
Iron (Fe), %		59.5 to 67.4

Manganese (Mn), %		0
Manganese (Mn), %		8.0 to 10

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

Nickel (Ni), %		0 to 0.0050
Nickel (Ni), %		5.5 to 7.5

Nitrogen (N), %		0 to 0.0020
Nitrogen (N), %		0.15 to 0.4

Oxygen (O), %		0 to 0.0070
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 0.030