SAE-AISI 8740 Steel vs. 60Cr-40Ni Alloy

SAE-AISI 8740 steel belongs to the iron alloys classification, while 60Cr-40Ni alloy belongs to the otherwise unclassified metals. There are 19 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 8740 steel and the bottom bar is 60Cr-40Ni alloy.

SAE-AISI 8740 (G87400) Ni-Cr-Mo Steel 60Cr-40Ni (R20600) Casting Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		220

Poisson's Ratio		0.29
Poisson's Ratio		0.25

Shear Modulus, GPa		73
Shear Modulus, GPa		87

Tensile Strength: Ultimate (UTS), MPa		580 to 670
Tensile Strength: Ultimate (UTS), MPa		870

Tensile Strength: Yield (Proof), MPa		380 to 570
Tensile Strength: Yield (Proof), MPa		660

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		370

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		490

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		16

Otherwise Unclassified Properties

Base Metal Price, % relative		2.6
Base Metal Price, % relative		49

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

Embodied Carbon, kg CO₂/kg material		1.5
Embodied Carbon, kg CO₂/kg material		7.4

Embodied Energy, MJ/kg		20
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		50
Embodied Water, L/kg		380

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		390 to 850
Resilience: Unit (Modulus of Resilience), kJ/m³		1000

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		16

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		26

Strength to Weight: Axial, points		20 to 24
Strength to Weight: Axial, points		31

Strength to Weight: Bending, points		20 to 22
Strength to Weight: Bending, points		26

Thermal Shock Resistance, points		17 to 20
Thermal Shock Resistance, points		18

Alloy Composition

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

Carbon (C), %		0.38 to 0.43
Carbon (C), %		0 to 0.1

Chromium (Cr), %		0.4 to 0.6
Chromium (Cr), %		58 to 62

Iron (Fe), %		96.5 to 97.7
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0.75 to 1.0
Manganese (Mn), %		0 to 0.3

Molybdenum (Mo), %		0.2 to 0.3
Molybdenum (Mo), %		0

Nickel (Ni), %		0.4 to 0.7
Nickel (Ni), %		34.5 to 42

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.3

Phosphorus (P), %		0 to 0.035
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0.15 to 0.35
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.020

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