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ACI-ASTM CK20 Steel vs. AISI 422 Stainless Steel

Both ACI-ASTM CK20 steel and AISI 422 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 (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
15 to 17
Fatigue Strength, MPa 220
410 to 500
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 530
910 to 1080
Tensile Strength: Yield (Proof), MPa 260
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 440
380
Maximum Temperature: Mechanical, °C 1100
650
Melting Completion (Liquidus), °C 1400
1480
Melting Onset (Solidus), °C 1430
1470
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
24
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 25
11
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.4
3.1
Embodied Energy, MJ/kg 62
44
Embodied Water, L/kg 190
100

Common Calculations

PREN (Pitting Resistance) 26
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 170
1140 to 1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
32 to 38
Strength to Weight: Bending, points 19
26 to 30
Thermal Diffusivity, mm2/s 3.7
6.4
Thermal Shock Resistance, points 13
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.2
0.2 to 0.25
Chromium (Cr), % 23 to 27
11 to 12.5
Iron (Fe), % 46.7 to 58
81.9 to 85.8
Manganese (Mn), % 0 to 2.0
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.9 to 1.3
Nickel (Ni), % 19 to 22
0.5 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.025
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3