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EN AC-42100 Aluminum vs. EN 1.4371 Stainless Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while EN 1.4371 stainless steel belongs to the iron 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 AC-42100 aluminum and the bottom bar is EN 1.4371 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.4 to 9.0
45 to 51
Fatigue Strength, MPa 76 to 82
290 to 340
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 280 to 290
740 to 750
Tensile Strength: Yield (Proof), MPa 210 to 230
320 to 340

Thermal Properties

Latent Heat of Fusion, J/g 500
280
Maximum Temperature: Mechanical, °C 170
880
Melting Completion (Liquidus), °C 610
1410
Melting Onset (Solidus), °C 600
1370
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.6
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.6
Embodied Energy, MJ/kg 150
38
Embodied Water, L/kg 1110
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
270 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
250 to 300
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 30 to 31
27
Strength to Weight: Bending, points 37 to 38
24
Thermal Diffusivity, mm2/s 66
4.0
Thermal Shock Resistance, points 13
16

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
16 to 17.5
Copper (Cu), % 0 to 0.050
0 to 1.0
Iron (Fe), % 0 to 0.19
66.7 to 74.4
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
6.0 to 8.0
Nickel (Ni), % 0
3.5 to 5.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 6.5 to 7.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0