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SAE-AISI D4 Steel vs. 308.0 Aluminum

SAE-AISI D4 steel belongs to the iron alloys classification, while 308.0 aluminum belongs to the aluminum alloys. There are 28 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 SAE-AISI D4 steel and the bottom bar is 308.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
73
Elongation at Break, % 8.4 to 15
2.0
Fatigue Strength, MPa 310 to 920
89
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 74
27
Shear Strength, MPa 460 to 1210
150
Tensile Strength: Ultimate (UTS), MPa 760 to 2060
190
Tensile Strength: Yield (Proof), MPa 470 to 1540
110

Thermal Properties

Latent Heat of Fusion, J/g 270
470
Melting Completion (Liquidus), °C 1430
620
Melting Onset (Solidus), °C 1380
540
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 31
140
Thermal Expansion, µm/m-K 12
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
37
Electrical Conductivity: Equal Weight (Specific), % IACS 5.0
110

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
10
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 3.3
7.7
Embodied Energy, MJ/kg 49
140
Embodied Water, L/kg 100
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 160
3.3
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 27 to 75
18
Strength to Weight: Bending, points 24 to 47
25
Thermal Diffusivity, mm2/s 8.3
55
Thermal Shock Resistance, points 23 to 63
9.2

Alloy Composition

Aluminum (Al), % 0
85.7 to 91
Carbon (C), % 2.1 to 2.4
0
Chromium (Cr), % 11 to 13
0
Copper (Cu), % 0 to 0.25
4.0 to 5.0
Iron (Fe), % 80.6 to 86.3
0 to 1.0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 0.6
0 to 0.5
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.6
5.0 to 6.0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0 to 1.0
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5