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ACI-ASTM CK20 Steel vs. EN 1.4655 Stainless Steel

Both ACI-ASTM CK20 steel and EN 1.4655 stainless steel are iron alloys. They have 82% 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 1.4655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
23 to 25
Fatigue Strength, MPa 220
320
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 530
720 to 730
Tensile Strength: Yield (Proof), MPa 260
450 to 480

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 440
440
Maximum Temperature: Mechanical, °C 1100
1050
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 25
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.4
2.9
Embodied Energy, MJ/kg 62
41
Embodied Water, L/kg 190
160

Common Calculations

PREN (Pitting Resistance) 26
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
150 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 170
510 to 580
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 3.7
4.0
Thermal Shock Resistance, points 13
20

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 23 to 27
22 to 24
Copper (Cu), % 0
1.0 to 3.0
Iron (Fe), % 46.7 to 58
63.6 to 73.4
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0.1 to 0.6
Nickel (Ni), % 19 to 22
3.5 to 5.5
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015