SAE-AISI O2 Steel vs. 50Cr-50Ni-Cb Alloy

SAE-AISI O2 steel belongs to the iron alloys classification, while 50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O2 steel and the bottom bar is 50Cr-50Ni-Cb alloy.

SAE-AISI O2 (T31502) Oil-Hardening Steel 50Cr-50Ni-Cb (R20501) Casting Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.29
Poisson's Ratio		0.26

Shear Modulus, GPa		72
Shear Modulus, GPa		84

Tensile Strength: Ultimate (UTS), MPa		640 to 2050
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		350

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Base Metal Price, % relative		2.4
Base Metal Price, % relative		60

Density, g/cm³		7.8
Density, g/cm³		8.0

Embodied Carbon, kg CO₂/kg material		1.8
Embodied Carbon, kg CO₂/kg material		9.2

Embodied Energy, MJ/kg		26
Embodied Energy, MJ/kg		130

Embodied Water, L/kg		50
Embodied Water, L/kg		350

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		23 to 73
Strength to Weight: Axial, points		21

Strength to Weight: Bending, points		21 to 46
Strength to Weight: Bending, points		20

Thermal Shock Resistance, points		22 to 70
Thermal Shock Resistance, points		14

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.25

Carbon (C), %		0.85 to 1.0
Carbon (C), %		0 to 0.1

Chromium (Cr), %		0 to 0.5
Chromium (Cr), %		47 to 52

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

Iron (Fe), %		95 to 97.8
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		1.4 to 1.8
Manganese (Mn), %		0 to 0.3

Molybdenum (Mo), %		0 to 0.3
Molybdenum (Mo), %		0

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		43.3 to 51.6

Niobium (Nb), %		0
Niobium (Nb), %		1.4 to 1.7

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.16

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0 to 0.020

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

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.5

Vanadium (V), %		0 to 0.3
Vanadium (V), %		0