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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.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 73
87
Tensile Strength: Ultimate (UTS), MPa 580 to 670
870
Tensile Strength: Yield (Proof), MPa 380 to 570
660

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Specific Heat Capacity, J/kg-K 470
490
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
49
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
7.4
Embodied Energy, MJ/kg 20
110
Embodied Water, L/kg 50
380

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
1000
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 20 to 24
31
Strength to Weight: Bending, points 20 to 22
26
Thermal Shock Resistance, points 17 to 20
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0.38 to 0.43
0 to 0.1
Chromium (Cr), % 0.4 to 0.6
58 to 62
Iron (Fe), % 96.5 to 97.7
0 to 1.0
Manganese (Mn), % 0.75 to 1.0
0 to 0.3
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 0.4 to 0.7
34.5 to 42
Nitrogen (N), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0 to 0.5