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ACI-ASTM CK20 Steel vs. R05240 Alloy

ACI-ASTM CK20 steel belongs to the iron alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is R05240 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
150
Elongation at Break, % 37
25
Poisson's Ratio 0.28
0.36
Shear Modulus, GPa 78
57
Tensile Strength: Ultimate (UTS), MPa 530
270
Tensile Strength: Yield (Proof), MPa 260
170

Thermal Properties

Latent Heat of Fusion, J/g 310
210
Specific Heat Capacity, J/kg-K 480
190
Thermal Expansion, µm/m-K 15
6.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
14
Embodied Water, L/kg 190
460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
59
Resilience: Unit (Modulus of Resilience), kJ/m3 170
90
Stiffness to Weight: Axial, points 14
6.3
Stiffness to Weight: Bending, points 25
13
Strength to Weight: Axial, points 19
5.4
Strength to Weight: Bending, points 19
6.8
Thermal Shock Resistance, points 13
18

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.010
Chromium (Cr), % 23 to 27
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 46.7 to 58
0 to 0.010
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0 to 0.020
Nickel (Ni), % 19 to 22
0 to 0.010
Niobium (Nb), % 0
35 to 42
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.0050
Sulfur (S), % 0 to 0.040
0
Tantalum (Ta), % 0
57.9 to 65
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
0 to 0.050