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AISI 420 Stainless Steel vs. SAE-AISI 8620 Steel

Both AISI 420 stainless steel and SAE-AISI 8620 steel are iron alloys. They have 87% 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 AISI 420 stainless steel and the bottom bar is SAE-AISI 8620 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
150 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0 to 15
13 to 31
Fatigue Strength, MPa 220 to 670
270 to 360
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 420 to 1010
340 to 420
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
520 to 690
Tensile Strength: Yield (Proof), MPa 380 to 1310
360 to 570

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 620
410
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
2.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 28
20
Embodied Water, L/kg 100
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
86 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
340 to 880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
18 to 24
Strength to Weight: Bending, points 22 to 41
18 to 22
Thermal Diffusivity, mm2/s 7.3
10
Thermal Shock Resistance, points 25 to 62
15 to 20

Alloy Composition

Carbon (C), % 0.15 to 0.4
0.18 to 0.23
Chromium (Cr), % 12 to 14
0.4 to 0.6
Iron (Fe), % 82.3 to 87.9
96.9 to 98
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 0 to 0.75
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040

Comparable Variants