MakeItFrom.com
Menu (ESC)

AISI 431 Stainless Steel vs. SAE-AISI 4820 Steel

Both AISI 431 stainless steel and SAE-AISI 4820 steel are iron alloys. They have 84% 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 431 stainless steel and the bottom bar is SAE-AISI 4820 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
21
Fatigue Strength, MPa 430 to 610
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 550 to 840
360
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
570
Tensile Strength: Yield (Proof), MPa 710 to 1040
370

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
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 26
51
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
4.3
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.2
1.8
Embodied Energy, MJ/kg 31
24
Embodied Water, L/kg 120
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
370
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 50
20
Strength to Weight: Bending, points 27 to 36
19
Thermal Diffusivity, mm2/s 7.0
14
Thermal Shock Resistance, points 28 to 43
19

Alloy Composition

Carbon (C), % 0 to 0.2
0.18 to 0.23
Chromium (Cr), % 15 to 17
0
Iron (Fe), % 78.2 to 83.8
94.6 to 95.7
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 1.3 to 2.5
3.3 to 3.8
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