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ACI-ASTM CK20 Steel vs. Type 2 Magnetic Alloy

Both ACI-ASTM CK20 steel and Type 2 magnetic alloy are iron alloys. They have 72% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is Type 2 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 37
2.0 to 38
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 78
72
Tensile Strength: Ultimate (UTS), MPa 530
510 to 910
Tensile Strength: Yield (Proof), MPa 260
260 to 870

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
460
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
4.2

Otherwise Unclassified Properties

Base Metal Price, % relative 25
33
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 4.4
5.9
Embodied Energy, MJ/kg 62
81
Embodied Water, L/kg 190
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
18 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 170
170 to 2010
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 19
17 to 30
Strength to Weight: Bending, points 19
17 to 25
Thermal Shock Resistance, points 13
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.050
Chromium (Cr), % 23 to 27
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 46.7 to 58
48.2 to 53
Manganese (Mn), % 0 to 2.0
0 to 0.8
Molybdenum (Mo), % 0 to 0.5
0 to 0.3
Nickel (Ni), % 19 to 22
47 to 49
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030