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ACI-ASTM CK20 Steel vs. EN 1.4003 Stainless Steel

Both ACI-ASTM CK20 steel and EN 1.4003 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 32 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 1.4003 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 37
22
Fatigue Strength, MPa 220
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 530
540
Tensile Strength: Yield (Proof), MPa 260
320

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
720
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
25
Thermal Expansion, µm/m-K 15
10

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
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.4
1.9
Embodied Energy, MJ/kg 62
27
Embodied Water, L/kg 190
97

Common Calculations

PREN (Pitting Resistance) 26
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
100
Resilience: Unit (Modulus of Resilience), kJ/m3 170
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 3.7
6.7
Thermal Shock Resistance, points 13
19

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 23 to 27
10.5 to 12.5
Iron (Fe), % 46.7 to 58
83.9 to 89.2
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
0.3 to 1.0
Nitrogen (N), % 0
0 to 0.030
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