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S40977 Stainless Steel vs. 1230A Aluminum

S40977 stainless steel belongs to the iron alloys classification, while 1230A aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 S40977 stainless steel and the bottom bar is 1230A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 21
4.5 to 34
Fatigue Strength, MPa 200
35 to 74
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 320
59 to 99
Tensile Strength: Ultimate (UTS), MPa 510
89 to 170
Tensile Strength: Yield (Proof), MPa 310
29 to 150

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 720
170
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 25
230
Thermal Expansion, µm/m-K 10
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
60
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
200

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
9.0
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.9
8.2
Embodied Energy, MJ/kg 27
150
Embodied Water, L/kg 97
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
6.4 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 250
5.9 to 150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 18
9.1 to 17
Strength to Weight: Bending, points 18
16 to 25
Thermal Diffusivity, mm2/s 6.7
93
Thermal Shock Resistance, points 18
4.0 to 7.6

Alloy Composition

Aluminum (Al), % 0
99.3 to 100
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 10.5 to 12.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 83.9 to 89.2
0 to 0.7
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.5
0 to 0.050
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0 to 0.050