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ACI-ASTM CH20 Steel vs. AISI 420F Stainless Steel

Both ACI-ASTM CH20 steel and AISI 420F stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CH20 steel and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 38
18
Fatigue Strength, MPa 290
270
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 610
740
Tensile Strength: Yield (Proof), MPa 350
430

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
25
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 20
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.7
2.0
Embodied Energy, MJ/kg 53
28
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 25
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
120
Resilience: Unit (Modulus of Resilience), kJ/m3 300
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
27
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 3.7
6.8
Thermal Shock Resistance, points 15
27

Alloy Composition

Carbon (C), % 0 to 0.2
0.3 to 0.4
Chromium (Cr), % 22 to 26
12 to 14
Iron (Fe), % 54.7 to 66
82.4 to 87.6
Manganese (Mn), % 0 to 1.5
0 to 1.3
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0.15 to 0.35