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EN AC-42100 Aluminum vs. S42030 Stainless Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while S42030 stainless steel belongs to the iron alloys. There are 29 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 EN AC-42100 aluminum and the bottom bar is S42030 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.4 to 9.0
16
Fatigue Strength, MPa 76 to 82
250
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Tensile Strength: Ultimate (UTS), MPa 280 to 290
670
Tensile Strength: Yield (Proof), MPa 210 to 230
410

Thermal Properties

Latent Heat of Fusion, J/g 500
280
Maximum Temperature: Mechanical, °C 170
780
Melting Completion (Liquidus), °C 610
1450
Melting Onset (Solidus), °C 600
1410
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 150
28
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.5
Embodied Energy, MJ/kg 150
34
Embodied Water, L/kg 1110
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
92
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
440
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 30 to 31
24
Strength to Weight: Bending, points 37 to 38
22
Thermal Diffusivity, mm2/s 66
7.7
Thermal Shock Resistance, points 13
24

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Carbon (C), % 0
0 to 0.3
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.050
2.0 to 3.0
Iron (Fe), % 0 to 0.19
77.6 to 85
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
1.0 to 3.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 6.5 to 7.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0