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AISI 304 Stainless Steel vs. EN AC-45000 Aluminum

AISI 304 stainless steel belongs to the iron alloys classification, while EN AC-45000 aluminum belongs to the aluminum alloys. There are 30 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 AISI 304 stainless steel and the bottom bar is EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 360
77
Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 8.0 to 43
1.1
Fatigue Strength, MPa 210 to 440
75
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
180
Tensile Strength: Yield (Proof), MPa 230 to 860
110

Thermal Properties

Latent Heat of Fusion, J/g 290
470
Maximum Temperature: Mechanical, °C 710
180
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1400
520
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 16
120
Thermal Expansion, µm/m-K 17
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
81

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 3.0
7.7
Embodied Energy, MJ/kg 43
140
Embodied Water, L/kg 150
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 250
1.7
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1870
80
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 21 to 42
17
Strength to Weight: Bending, points 20 to 32
24
Thermal Diffusivity, mm2/s 4.2
47
Thermal Shock Resistance, points 12 to 25
8.0

Alloy Composition

Aluminum (Al), % 0
82.2 to 91.8
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 18 to 20
0 to 0.15
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 66.5 to 74
0 to 1.0
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 0
0 to 0.55
Manganese (Mn), % 0 to 2.0
0.2 to 0.65
Nickel (Ni), % 8.0 to 10.5
0 to 0.45
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
5.0 to 7.0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 2.0
Residuals, % 0
0 to 0.35