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AISI 422 Stainless Steel vs. SAE-AISI 8620 Steel

Both AISI 422 stainless steel and SAE-AISI 8620 steel are iron alloys. They have 86% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 422 stainless steel and the bottom bar is SAE-AISI 8620 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
150 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
13 to 31
Fatigue Strength, MPa 410 to 500
270 to 360
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 560 to 660
340 to 420
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
520 to 690
Tensile Strength: Yield (Proof), MPa 670 to 870
360 to 570

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 650
410
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1470
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 24
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.6
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.5
Embodied Energy, MJ/kg 44
20
Embodied Water, L/kg 100
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
86 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1910
340 to 880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 38
18 to 24
Strength to Weight: Bending, points 26 to 30
18 to 22
Thermal Diffusivity, mm2/s 6.4
10
Thermal Shock Resistance, points 33 to 39
15 to 20

Alloy Composition

Carbon (C), % 0.2 to 0.25
0.18 to 0.23
Chromium (Cr), % 11 to 12.5
0.4 to 0.6
Iron (Fe), % 81.9 to 85.8
96.9 to 98
Manganese (Mn), % 0.5 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 0.9 to 1.3
0.15 to 0.25
Nickel (Ni), % 0.5 to 1.0
0.4 to 0.7
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.040
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0