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ACI-ASTM CK20 Steel vs. EN 1.6771 Steel

Both ACI-ASTM CK20 steel and EN 1.6771 steel are iron alloys. They have 58% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is EN 1.6771 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
280 to 350
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 37
8.0 to 8.7
Fatigue Strength, MPa 220
440 to 680
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 530
930 to 1180
Tensile Strength: Yield (Proof), MPa 260
740 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
440
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
46
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 25
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.4
1.9
Embodied Energy, MJ/kg 62
25
Embodied Water, L/kg 190
58

Common Calculations

PREN (Pitting Resistance) 26
2.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
75 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 170
1460 to 3450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
33 to 41
Strength to Weight: Bending, points 19
27 to 31
Thermal Diffusivity, mm2/s 3.7
13
Thermal Shock Resistance, points 13
27 to 35

Alloy Composition

Carbon (C), % 0 to 0.2
0.27 to 0.33
Chromium (Cr), % 23 to 27
0.8 to 1.2
Iron (Fe), % 46.7 to 58
92.2 to 95
Manganese (Mn), % 0 to 2.0
0.6 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.3 to 0.6
Nickel (Ni), % 19 to 22
3.0 to 4.0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.020