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S20431 Stainless Steel vs. AISI 420F Stainless Steel

Both S20431 stainless steel and AISI 420F stainless steel are iron alloys. Both are furnished in the annealed condition. They have 84% of their average alloy composition in common. There are 33 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 S20431 stainless steel and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 46
18
Fatigue Strength, MPa 320
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 500
460
Tensile Strength: Ultimate (UTS), MPa 710
740
Tensile Strength: Yield (Proof), MPa 350
430

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 890
760
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1360
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.5
2.0
Embodied Energy, MJ/kg 36
28
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 20
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
120
Resilience: Unit (Modulus of Resilience), kJ/m3 310
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
27
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 4.0
6.8
Thermal Shock Resistance, points 15
27

Alloy Composition

Carbon (C), % 0 to 0.12
0.3 to 0.4
Chromium (Cr), % 17 to 18
12 to 14
Copper (Cu), % 1.5 to 3.5
0
Iron (Fe), % 66.1 to 74.4
82.4 to 87.6
Manganese (Mn), % 5.0 to 7.0
0 to 1.3
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0.15 to 0.35