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S20910 Stainless Steel vs. 771.0 Aluminum

S20910 stainless steel belongs to the iron alloys classification, while 771.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, 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 S20910 stainless steel and the bottom bar is 771.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230 to 290
85 to 120
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 14 to 39
1.7 to 6.5
Fatigue Strength, MPa 310 to 460
92 to 180
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 780 to 940
250 to 370
Tensile Strength: Yield (Proof), MPa 430 to 810
210 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1080
180
Melting Completion (Liquidus), °C 1420
630
Melting Onset (Solidus), °C 1380
620
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 13
140 to 150
Thermal Expansion, µm/m-K 16
24

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.5
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 4.8
8.0
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
4.4 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
310 to 900
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 28 to 33
23 to 35
Strength to Weight: Bending, points 24 to 27
29 to 39
Thermal Diffusivity, mm2/s 3.6
54 to 58
Thermal Shock Resistance, points 17 to 21
11 to 16

Alloy Composition

Aluminum (Al), % 0
90.5 to 92.5
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0.060 to 0.2
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 52.1 to 62.1
0 to 0.15
Magnesium (Mg), % 0
0.8 to 1.0
Manganese (Mn), % 4.0 to 6.0
0 to 0.1
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.75
0 to 0.15
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.1 to 0.2
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
6.5 to 7.5
Residuals, % 0
0 to 0.15