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EN 1.4422 Stainless Steel vs. ACI-ASTM CK20 Steel

Both EN 1.4422 stainless steel and ACI-ASTM CK20 steel are iron alloys. They have 70% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4422 stainless steel and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
37
Fatigue Strength, MPa 380
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 850
530
Tensile Strength: Yield (Proof), MPa 630
260

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Corrosion, °C 390
440
Maximum Temperature: Mechanical, °C 760
1100
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 10
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
25
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.7
4.4
Embodied Energy, MJ/kg 37
62
Embodied Water, L/kg 110
190

Common Calculations

PREN (Pitting Resistance) 17
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
160
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
19
Strength to Weight: Bending, points 25
19
Thermal Diffusivity, mm2/s 4.3
3.7
Thermal Shock Resistance, points 31
13

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.2
Chromium (Cr), % 11 to 13
23 to 27
Copper (Cu), % 0.2 to 0.8
0
Iron (Fe), % 76.8 to 83.5
46.7 to 58
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 1.3 to 1.8
0 to 0.5
Nickel (Ni), % 4.0 to 5.0
19 to 22
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.0030
0 to 0.040