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ACI-ASTM CF3 Steel vs. 50Cr-50Ni Alloy

ACI-ASTM CF3 steel belongs to the iron alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF3 steel and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 60
5.7
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 510
620
Tensile Strength: Yield (Proof), MPa 250
390

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Specific Heat Capacity, J/kg-K 480
490
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 16
50
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.2
7.9
Embodied Energy, MJ/kg 45
110
Embodied Water, L/kg 150
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
31
Resilience: Unit (Modulus of Resilience), kJ/m3 160
350
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
21
Strength to Weight: Bending, points 18
20
Thermal Shock Resistance, points 11
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 17 to 21
48 to 52
Iron (Fe), % 62.9 to 75
0 to 1.0
Manganese (Mn), % 0 to 1.5
0 to 0.3
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 8.0 to 12
44.5 to 52
Nitrogen (N), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0 to 0.5