SAE-AISI A9 Steel vs. Grade 363 Molybdenum

SAE-AISI A9 steel belongs to the iron alloys classification, while grade 363 molybdenum belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is grade 363 molybdenum.

SAE-AISI A9 (T30109) Air-Hardening Steel Grade 363 Molybdenum

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		310

Poisson's Ratio		0.29
Poisson's Ratio		0.31

Shear Modulus, GPa		74
Shear Modulus, GPa		120

Tensile Strength: Ultimate (UTS), MPa		770 to 2030
Tensile Strength: Ultimate (UTS), MPa		580 to 720

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		370

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

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		7.0

Otherwise Unclassified Properties

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

Embodied Carbon, kg CO₂/kg material		4.7
Embodied Carbon, kg CO₂/kg material		28

Embodied Energy, MJ/kg		70
Embodied Energy, MJ/kg		330

Embodied Water, L/kg		82
Embodied Water, L/kg		360

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		17

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

Strength to Weight: Axial, points		28 to 73
Strength to Weight: Axial, points		16 to 20

Strength to Weight: Bending, points		24 to 46
Strength to Weight: Bending, points		15 to 17

Thermal Shock Resistance, points		25 to 66
Thermal Shock Resistance, points		19 to 24

Alloy Composition

Carbon (C), %		0.45 to 0.55
Carbon (C), %		0.010 to 0.030

Chromium (Cr), %		4.8 to 5.5
Chromium (Cr), %		0

Copper (Cu), %		0 to 0.25
Copper (Cu), %		0

Iron (Fe), %		87 to 90.5
Iron (Fe), %		0 to 0.010

Manganese (Mn), %		0 to 0.5
Manganese (Mn), %		0

Molybdenum (Mo), %		1.3 to 1.8
Molybdenum (Mo), %		99.3 to 99.5

Nickel (Ni), %		1.3 to 1.8
Nickel (Ni), %		0 to 0.0020

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.0030

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0

Silicon (Si), %		1.0 to 1.2
Silicon (Si), %		0 to 0.010

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0

Titanium (Ti), %		0
Titanium (Ti), %		0.4 to 0.55

Vanadium (V), %		0.8 to 1.4
Vanadium (V), %		0

Zirconium (Zr), %		0
Zirconium (Zr), %		0.060 to 0.12