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380.0 Aluminum vs. S44725 Stainless Steel

380.0 aluminum belongs to the aluminum alloys classification, while S44725 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 380.0 aluminum and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
180
Elastic (Young's, Tensile) Modulus, GPa 74
200
Elongation at Break, % 3.0
22
Fatigue Strength, MPa 140
210
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 28
81
Shear Strength, MPa 190
320
Tensile Strength: Ultimate (UTS), MPa 320
500
Tensile Strength: Yield (Proof), MPa 160
310

Thermal Properties

Latent Heat of Fusion, J/g 510
290
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 100
17
Thermal Expansion, µm/m-K 22
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 83
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
15
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 7.5
3.1
Embodied Energy, MJ/kg 140
44
Embodied Water, L/kg 1040
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0
99
Resilience: Unit (Modulus of Resilience), kJ/m3 170
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 48
25
Strength to Weight: Axial, points 31
18
Strength to Weight: Bending, points 36
18
Thermal Diffusivity, mm2/s 40
4.6
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 79.6 to 89.5
0
Carbon (C), % 0
0 to 0.015
Chromium (Cr), % 0
25 to 28.5
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 0 to 2.0
67.6 to 73.5
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 0.4
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0 to 0.5
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 0.040
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 0 to 0.35
0
Titanium (Ti), % 0
0 to 0.26
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0