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EN 1.4310 Stainless Steel vs. 7204 Aluminum

EN 1.4310 stainless steel belongs to the iron alloys classification, while 7204 aluminum belongs to the aluminum 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 1.4310 stainless steel and the bottom bar is 7204 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 14 to 45
11 to 13
Fatigue Strength, MPa 240 to 330
110 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 510 to 550
130 to 220
Tensile Strength: Ultimate (UTS), MPa 730 to 900
220 to 380
Tensile Strength: Yield (Proof), MPa 260 to 570
120 to 310

Thermal Properties

Latent Heat of Fusion, J/g 290
380
Maximum Temperature: Mechanical, °C 910
210
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
520
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 18
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
39
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
120

Otherwise Unclassified Properties

Base Metal Price, % relative 14
9.5
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 2.9
8.4
Embodied Energy, MJ/kg 42
150
Embodied Water, L/kg 140
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 260
25 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 830
110 to 710
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 26 to 32
21 to 36
Strength to Weight: Bending, points 23 to 27
28 to 40
Thermal Diffusivity, mm2/s 4.0
58
Thermal Shock Resistance, points 15 to 18
9.4 to 16

Alloy Composition

Aluminum (Al), % 0
90.5 to 94.8
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 16 to 19
0 to 0.3
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 66.4 to 78
0 to 0.35
Magnesium (Mg), % 0
1.0 to 2.0
Manganese (Mn), % 0 to 2.0
0.2 to 0.7
Molybdenum (Mo), % 0 to 0.8
0
Nickel (Ni), % 6.0 to 9.5
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 2.0
0 to 0.3
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0
0 to 0.1
Zinc (Zn), % 0
4.0 to 5.0
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15