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S21460 Stainless Steel vs. 3103 Aluminum

S21460 stainless steel belongs to the iron alloys classification, while 3103 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 S21460 stainless steel and the bottom bar is 3103 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
27 to 62
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 46
1.1 to 28
Fatigue Strength, MPa 390
38 to 83
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 580
68 to 130
Tensile Strength: Ultimate (UTS), MPa 830
100 to 220
Tensile Strength: Yield (Proof), MPa 430
39 to 200

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 920
190
Melting Completion (Liquidus), °C 1380
660
Melting Onset (Solidus), °C 1330
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 18
23

Otherwise Unclassified Properties

Base Metal Price, % relative 14
9.5
Density, g/cm3 7.6
2.8
Embodied Carbon, kg CO2/kg material 3.0
8.2
Embodied Energy, MJ/kg 43
150
Embodied Water, L/kg 160
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
2.4 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 460
11 to 280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 30
10 to 22
Strength to Weight: Bending, points 26
18 to 30
Thermal Shock Resistance, points 17
4.6 to 9.9

Alloy Composition

Aluminum (Al), % 0
96.3 to 99.1
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 17 to 19
0 to 0.1
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 57.3 to 63.7
0 to 0.7
Magnesium (Mg), % 0
0 to 0.3
Manganese (Mn), % 14 to 16
0.9 to 1.5
Nickel (Ni), % 5.0 to 6.0
0
Nitrogen (N), % 0.35 to 0.5
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0 to 0.1
Residuals, % 0
0 to 0.15