MakeItFrom.com
Menu (ESC)

S31730 Stainless Steel vs. 3105 Aluminum

S31730 stainless steel belongs to the iron alloys classification, while 3105 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, 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 S31730 stainless steel and the bottom bar is 3105 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
29 to 67
Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 40
1.1 to 20
Fatigue Strength, MPa 170
39 to 95
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 370
77 to 140
Tensile Strength: Ultimate (UTS), MPa 540
120 to 240
Tensile Strength: Yield (Proof), MPa 200
46 to 220

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 990
180
Melting Completion (Liquidus), °C 1430
660
Melting Onset (Solidus), °C 1390
640
Specific Heat Capacity, J/kg-K 470
900
Thermal Expansion, µm/m-K 16
24

Otherwise Unclassified Properties

Base Metal Price, % relative 24
9.5
Density, g/cm3 8.0
2.8
Embodied Carbon, kg CO2/kg material 4.6
8.2
Embodied Energy, MJ/kg 63
150
Embodied Water, L/kg 180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
2.6 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 99
15 to 340
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 19
12 to 24
Strength to Weight: Bending, points 18
20 to 31
Thermal Shock Resistance, points 12
5.2 to 11

Alloy Composition

Aluminum (Al), % 0
96 to 99.5
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17 to 19
0 to 0.2
Copper (Cu), % 4.0 to 5.0
0 to 0.3
Iron (Fe), % 52.4 to 61
0 to 0.7
Magnesium (Mg), % 0
0.2 to 0.8
Manganese (Mn), % 0 to 2.0
0.3 to 0.8
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
0
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.4
Residuals, % 0
0 to 0.15