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50Cr-50Ni Alloy vs. ACI-ASTM CF8 Steel

50Cr-50Ni alloy belongs to the otherwise unclassified metals classification, while ACI-ASTM CF8 steel belongs to the iron alloys. 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 50Cr-50Ni alloy and the bottom bar is ACI-ASTM CF8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 5.7
55
Poisson's Ratio 0.26
0.28
Shear Modulus, GPa 84
77
Tensile Strength: Ultimate (UTS), MPa 620
540
Tensile Strength: Yield (Proof), MPa 390
260

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 50
16
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 7.9
3.1
Embodied Energy, MJ/kg 110
44
Embodied Water, L/kg 350
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
240
Resilience: Unit (Modulus of Resilience), kJ/m3 350
160
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
19
Strength to Weight: Bending, points 20
19
Thermal Shock Resistance, points 14
13

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 48 to 52
18 to 21
Iron (Fe), % 0 to 1.0
63.8 to 74
Manganese (Mn), % 0 to 0.3
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 44.5 to 52
8.0 to 11
Nitrogen (N), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040
Titanium (Ti), % 0 to 0.5
0