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AISI 348 Stainless Steel vs. 308.0 Aluminum

AISI 348 stainless steel belongs to the iron alloys classification, while 308.0 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, 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 AISI 348 stainless steel and the bottom bar is 308.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
70
Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 41
2.0
Fatigue Strength, MPa 200
89
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 400
150
Tensile Strength: Ultimate (UTS), MPa 580
190
Tensile Strength: Yield (Proof), MPa 230
110

Thermal Properties

Latent Heat of Fusion, J/g 290
470
Maximum Temperature: Mechanical, °C 940
170
Melting Completion (Liquidus), °C 1430
620
Melting Onset (Solidus), °C 1390
540
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 16
140
Thermal Expansion, µm/m-K 16
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
37
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
110

Otherwise Unclassified Properties

Base Metal Price, % relative 19
10
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 3.7
7.7
Embodied Energy, MJ/kg 54
140
Embodied Water, L/kg 150
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
3.3
Resilience: Unit (Modulus of Resilience), kJ/m3 140
83
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 4.2
55
Thermal Shock Resistance, points 13
9.2

Alloy Composition

Aluminum (Al), % 0
85.7 to 91
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17 to 19
0
Cobalt (Co), % 0 to 0.2
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 63.8 to 74
0 to 1.0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 2.0
0 to 0.5
Nickel (Ni), % 9.0 to 13
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
5.0 to 6.0
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0 to 0.1
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5