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EN 1.4308 Stainless Steel vs. EN AC-42000 Aluminum

EN 1.4308 stainless steel belongs to the iron alloys classification, while EN AC-42000 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 EN 1.4308 stainless steel and the bottom bar is EN AC-42000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
59 to 91
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 34
1.1 to 2.4
Fatigue Strength, MPa 160
67 to 76
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 510
170 to 270
Tensile Strength: Yield (Proof), MPa 200
95 to 230

Thermal Properties

Latent Heat of Fusion, J/g 290
500
Maximum Temperature: Mechanical, °C 960
170
Melting Completion (Liquidus), °C 1420
610
Melting Onset (Solidus), °C 1380
600
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
160
Thermal Expansion, µm/m-K 17
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
38
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
130

Otherwise Unclassified Properties

Base Metal Price, % relative 15
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 3.0
8.0
Embodied Energy, MJ/kg 43
150
Embodied Water, L/kg 150
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
2.8 to 5.7
Resilience: Unit (Modulus of Resilience), kJ/m3 100
64 to 370
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 18
18 to 28
Strength to Weight: Bending, points 18
26 to 35
Thermal Diffusivity, mm2/s 4.1
66
Thermal Shock Resistance, points 11
7.9 to 12

Alloy Composition


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Aluminum (Al), % 0
89.9 to 93.3
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 18 to 20
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 65.9 to 74
0 to 0.55
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.2 to 0.65
Manganese (Mn), % 0 to 1.5
0 to 0.35
Nickel (Ni), % 8.0 to 11
0 to 0.15
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
6.5 to 7.5
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