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ACI-ASTM CK20 Steel vs. EN 1.4587 Stainless Steel

Both ACI-ASTM CK20 steel and EN 1.4587 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 1.4587 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
34
Fatigue Strength, MPa 220
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 530
540
Tensile Strength: Yield (Proof), MPa 260
250

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Corrosion, °C 440
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
17
Thermal Expansion, µm/m-K 15
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 25
36
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.4
6.3
Embodied Energy, MJ/kg 62
87
Embodied Water, L/kg 190
230

Common Calculations

PREN (Pitting Resistance) 26
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
150
Resilience: Unit (Modulus of Resilience), kJ/m3 170
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 3.7
4.5
Thermal Shock Resistance, points 13
13

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 23 to 27
24 to 26
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 46.7 to 58
32.7 to 41.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
4.0 to 5.0
Nickel (Ni), % 19 to 22
28 to 30
Nitrogen (N), % 0
0.15 to 0.25
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 0.025