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S21600 Stainless Steel vs. 3004 Aluminum

S21600 stainless steel belongs to the iron alloys classification, while 3004 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, 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 S21600 stainless steel and the bottom bar is 3004 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
45 to 83
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 46
1.1 to 19
Fatigue Strength, MPa 360
55 to 120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Shear Strength, MPa 500
100 to 180
Tensile Strength: Ultimate (UTS), MPa 710
170 to 310
Tensile Strength: Yield (Proof), MPa 390
68 to 270

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 990
180
Melting Completion (Liquidus), °C 1420
650
Melting Onset (Solidus), °C 1380
630
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 17
24

Otherwise Unclassified Properties

Base Metal Price, % relative 17
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 3.6
8.3
Embodied Energy, MJ/kg 50
150
Embodied Water, L/kg 160
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
3.2 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 370
33 to 540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 25
18 to 31
Strength to Weight: Bending, points 23
25 to 37
Thermal Shock Resistance, points 15
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
95.6 to 98.2
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17.5 to 22
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 57.6 to 67.8
0 to 0.7
Magnesium (Mg), % 0
0.8 to 1.3
Manganese (Mn), % 7.5 to 9.0
1.0 to 1.5
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 5.0 to 7.0
0
Nitrogen (N), % 0.25 to 0.5
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15