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ACI-ASTM CK20 Steel vs. S42030 Stainless Steel

Both ACI-ASTM CK20 steel and S42030 stainless steel are iron alloys. They have 67% 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 S42030 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
16
Fatigue Strength, MPa 220
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 530
670
Tensile Strength: Yield (Proof), MPa 260
410

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
780
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
28
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 25
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.4
2.5
Embodied Energy, MJ/kg 62
34
Embodied Water, L/kg 190
110

Common Calculations

PREN (Pitting Resistance) 26
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
92
Resilience: Unit (Modulus of Resilience), kJ/m3 170
440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 3.7
7.7
Thermal Shock Resistance, points 13
24

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.3
Chromium (Cr), % 23 to 27
12 to 14
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 46.7 to 58
77.6 to 85
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
1.0 to 3.0
Nickel (Ni), % 19 to 22
0
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 0.030