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ACI-ASTM CK20 Steel vs. EN 1.4024 Stainless Steel

Both ACI-ASTM CK20 steel and EN 1.4024 stainless steel are iron alloys. They have 66% 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 1.4024 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 37
15 to 22
Fatigue Strength, MPa 220
220 to 300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 530
590 to 750
Tensile Strength: Yield (Proof), MPa 260
330 to 510

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
30
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 25
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.4
1.9
Embodied Energy, MJ/kg 62
27
Embodied Water, L/kg 190
100

Common Calculations

PREN (Pitting Resistance) 26
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
98 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 170
280 to 660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
21 to 27
Strength to Weight: Bending, points 19
20 to 24
Thermal Diffusivity, mm2/s 3.7
8.1
Thermal Shock Resistance, points 13
21 to 26

Alloy Composition

Carbon (C), % 0 to 0.2
0.12 to 0.17
Chromium (Cr), % 23 to 27
12 to 14
Iron (Fe), % 46.7 to 58
83.8 to 87.9
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015