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S31277 Stainless Steel vs. 705.0 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 25 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 S31277 stainless steel and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
69
Elongation at Break, % 45
8.4 to 10
Fatigue Strength, MPa 380
63 to 98
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 860
240 to 260
Tensile Strength: Yield (Proof), MPa 410
130

Thermal Properties

Latent Heat of Fusion, J/g 310
390
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
610
Specific Heat Capacity, J/kg-K 460
890
Thermal Expansion, µm/m-K 16
24

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 8.1
2.8
Embodied Carbon, kg CO2/kg material 6.7
8.4
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
18 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 410
120 to 130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 29
24 to 26
Strength to Weight: Bending, points 25
31 to 32
Thermal Shock Resistance, points 19
11

Alloy Composition


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Aluminum (Al), % 0
92.3 to 98.6
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0 to 0.4
Copper (Cu), % 0.5 to 1.5
0 to 0.2
Iron (Fe), % 35.5 to 46.2
0 to 0.8
Magnesium (Mg), % 0
1.4 to 1.8
Manganese (Mn), % 0 to 3.0
0 to 0.6
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.2
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 3.3
Residuals, % 0
0 to 0.15