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ACI-ASTM CH20 Steel vs. 50Cr-50Ni Alloy

ACI-ASTM CH20 steel belongs to the iron alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. They have a modest 39% 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 CH20 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, % 38
5.7
Poisson's Ratio 0.27
0.26
Shear Modulus, GPa 78
84
Tensile Strength: Ultimate (UTS), MPa 610
620
Tensile Strength: Yield (Proof), MPa 350
390

Thermal Properties

Latent Heat of Fusion, J/g 310
350
Specific Heat Capacity, J/kg-K 480
490
Thermal Expansion, µm/m-K 15
15

Otherwise Unclassified Properties

Base Metal Price, % relative 20
50
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.7
7.9
Embodied Energy, MJ/kg 53
110
Embodied Water, L/kg 180
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
31
Resilience: Unit (Modulus of Resilience), kJ/m3 300
350
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 21
20
Thermal Shock Resistance, points 15
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0 to 0.2
0 to 0.1
Chromium (Cr), % 22 to 26
48 to 52
Iron (Fe), % 54.7 to 66
0 to 1.0
Manganese (Mn), % 0 to 1.5
0 to 0.3
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
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