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SAE-AISI 4720 Steel vs. 60Cr-40Ni Alloy

SAE-AISI 4720 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 4720 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 490
870
Tensile Strength: Yield (Proof), MPa 350
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 2.9
49
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
7.4
Embodied Energy, MJ/kg 21
110
Embodied Water, L/kg 50
380

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 330
1000
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 17
31
Strength to Weight: Bending, points 18
26
Thermal Shock Resistance, points 14
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0.17 to 0.22
0 to 0.1
Chromium (Cr), % 0.35 to 0.55
58 to 62
Iron (Fe), % 96.7 to 97.8
0 to 1.0
Manganese (Mn), % 0.5 to 0.7
0 to 0.3
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.9 to 1.2
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