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ACI-ASTM CF20 Steel vs. N08801 Stainless Steel

Both ACI-ASTM CF20 steel and N08801 stainless steel are iron alloys. They have 75% 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 N08801 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
34
Fatigue Strength, MPa 240
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 530
860
Tensile Strength: Yield (Proof), MPa 250
190

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
630
Maximum Temperature: Mechanical, °C 970
1090
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
12
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 16
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.1
5.5
Embodied Energy, MJ/kg 44
79
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 20
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
220
Resilience: Unit (Modulus of Resilience), kJ/m3 160
92
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
30
Strength to Weight: Bending, points 19
25
Thermal Diffusivity, mm2/s 4.3
3.3
Thermal Shock Resistance, points 11
20

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.1
Chromium (Cr), % 18 to 21
19 to 22
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 64.2 to 74
39.5 to 50.3
Manganese (Mn), % 0 to 1.5
0 to 1.5
Nickel (Ni), % 8.0 to 11
30 to 34
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0.75 to 1.5