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AISI 420 Stainless Steel vs. EN AC-45300 Aluminum

AISI 420 stainless steel belongs to the iron alloys classification, while EN AC-45300 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is EN AC-45300 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
94 to 120
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 8.0 to 15
1.0 to 2.8
Fatigue Strength, MPa 220 to 670
59 to 72
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
220 to 290
Tensile Strength: Yield (Proof), MPa 380 to 1310
150 to 230

Thermal Properties

Latent Heat of Fusion, J/g 280
470
Maximum Temperature: Mechanical, °C 620
170
Melting Completion (Liquidus), °C 1510
630
Melting Onset (Solidus), °C 1450
590
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 27
150
Thermal Expansion, µm/m-K 10
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
36
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
120

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.0
8.0
Embodied Energy, MJ/kg 28
150
Embodied Water, L/kg 100
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
2.7 to 5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
160 to 390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 25 to 62
23 to 29
Strength to Weight: Bending, points 22 to 41
30 to 35
Thermal Diffusivity, mm2/s 7.3
60
Thermal Shock Resistance, points 25 to 62
10 to 13

Alloy Composition

Aluminum (Al), % 0
90.2 to 94.2
Carbon (C), % 0.15 to 0.4
0
Chromium (Cr), % 12 to 14
0
Copper (Cu), % 0
1.0 to 1.5
Iron (Fe), % 82.3 to 87.9
0 to 0.65
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.35 to 0.65
Manganese (Mn), % 0 to 1.0
0 to 0.55
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
4.5 to 5.5
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15