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ACI-ASTM CF20 Steel vs. AISI 414 Stainless Steel

Both ACI-ASTM CF20 steel and AISI 414 stainless steel are iron alloys. They have 85% 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 ACI-ASTM CF20 steel and the bottom bar is AISI 414 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
17
Fatigue Strength, MPa 240
430 to 480
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 530
900 to 960
Tensile Strength: Yield (Proof), MPa 250
700 to 790

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 970
750
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 16
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.1
Embodied Energy, MJ/kg 44
29
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 20
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1260 to 1590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
32 to 34
Strength to Weight: Bending, points 19
27 to 28
Thermal Diffusivity, mm2/s 4.3
6.7
Thermal Shock Resistance, points 11
33 to 35

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.15
Chromium (Cr), % 18 to 21
11.5 to 13.5
Iron (Fe), % 64.2 to 74
81.8 to 87.3
Manganese (Mn), % 0 to 1.5
0 to 1.0
Nickel (Ni), % 8.0 to 11
1.3 to 2.5
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