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ACI-ASTM CF20 Steel vs. S66286 Stainless Steel

Both ACI-ASTM CF20 steel and S66286 stainless steel are iron alloys. They have 80% 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 CF20 steel and the bottom bar is S66286 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
17 to 40
Fatigue Strength, MPa 240
240 to 410
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 530
620 to 1020
Tensile Strength: Yield (Proof), MPa 250
280 to 670

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
780
Maximum Temperature: Mechanical, °C 970
920
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 16
26
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.1
6.0
Embodied Energy, MJ/kg 44
87
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 20
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
150 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 160
190 to 1150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
22 to 36
Strength to Weight: Bending, points 19
20 to 28
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 11
13 to 22

Alloy Composition

Aluminum (Al), % 0
0 to 0.35
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0 to 0.2
0 to 0.080
Chromium (Cr), % 18 to 21
13.5 to 16
Iron (Fe), % 64.2 to 74
49.1 to 59.5
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
1.0 to 1.5
Nickel (Ni), % 8.0 to 11
24 to 27
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
Titanium (Ti), % 0
1.9 to 2.4
Vanadium (V), % 0
0.1 to 0.5