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3003 Aluminum vs. EN 1.4945 Stainless Steel

3003 aluminum belongs to the aluminum alloys classification, while EN 1.4945 stainless steel belongs to the iron alloys. There are 31 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 3003 aluminum and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 28 to 65
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.1 to 28
19 to 34
Fatigue Strength, MPa 39 to 90
230 to 350
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 68 to 130
430 to 460
Tensile Strength: Ultimate (UTS), MPa 110 to 240
640 to 740
Tensile Strength: Yield (Proof), MPa 40 to 210
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 180
920
Melting Completion (Liquidus), °C 650
1490
Melting Onset (Solidus), °C 640
1440
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
14
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 2.8
8.1
Embodied Carbon, kg CO2/kg material 8.1
5.0
Embodied Energy, MJ/kg 150
73
Embodied Water, L/kg 1180
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 0.95 to 63
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 300
210 to 760
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 11 to 24
22 to 25
Strength to Weight: Bending, points 18 to 30
20 to 22
Thermal Diffusivity, mm2/s 71
3.7
Thermal Shock Resistance, points 4.7 to 10
14 to 16

Alloy Composition

Aluminum (Al), % 96.8 to 99
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0
15.5 to 17.5
Copper (Cu), % 0.050 to 0.2
0
Iron (Fe), % 0 to 0.7
57.9 to 65.7
Manganese (Mn), % 1.0 to 1.5
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.6
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0