Grade 361 Molybdenum vs. AWS ER80S-B8

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while AWS ER80S-B8 belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is grade 361 molybdenum and the bottom bar is AWS ER80S-B8.

Grade 361 Molybdenum AWS ER80S-B8 or ER55S-B8 (S50480) Weld Metal

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, %		19

Poisson's Ratio		0.31
Poisson's Ratio		0.28

Shear Modulus, GPa		120
Shear Modulus, GPa		75

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		630

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

Thermal Properties

Latent Heat of Fusion, J/g		370
Latent Heat of Fusion, J/g		270

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		470

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		2.0

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

Embodied Water, L/kg		360
Embodied Water, L/kg		89

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		720

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		22

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		17

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0 to 0.1

Chromium (Cr), %		0
Chromium (Cr), %		8.0 to 10.5

Copper (Cu), %		0
Copper (Cu), %		0 to 0.35

Iron (Fe), %		0 to 0.010
Iron (Fe), %		85.6 to 90.8

Manganese (Mn), %		0
Manganese (Mn), %		0.4 to 0.7

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		0.8 to 1.2

Nickel (Ni), %		0 to 0.0050
Nickel (Ni), %		0 to 0.5

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 0.025

Silicon (Si), %		0 to 0.010
Silicon (Si), %		0 to 0.5

Sulfur (S), %		0
Sulfur (S), %		0 to 0.025

Residuals, %		0
Residuals, %		0 to 0.5