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EN AC-42100 Aluminum vs. S44627 Stainless Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while S44627 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 S44627 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
170
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.4 to 9.0
24
Fatigue Strength, MPa 76 to 82
200
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
80
Tensile Strength: Ultimate (UTS), MPa 280 to 290
490
Tensile Strength: Yield (Proof), MPa 210 to 230
300

Thermal Properties

Latent Heat of Fusion, J/g 500
290
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 610
1440
Melting Onset (Solidus), °C 600
1400
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 150
17
Thermal Expansion, µm/m-K 22
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
14
Density, g/cm3 2.6
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.9
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 1110
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
100
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
220
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 30 to 31
18
Strength to Weight: Bending, points 37 to 38
18
Thermal Diffusivity, mm2/s 66
4.6
Thermal Shock Resistance, points 13
16

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
25 to 27.5
Copper (Cu), % 0 to 0.050
0 to 0.2
Iron (Fe), % 0 to 0.19
69.2 to 74.2
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
0 to 0.4
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0.050 to 0.2
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 6.5 to 7.5
0 to 0.4
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0