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SAE-AISI M4 Steel vs. 2195 Aluminum

SAE-AISI M4 steel belongs to the iron alloys classification, while 2195 aluminum belongs to the aluminum alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 M4 steel and the bottom bar is 2195 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 76
26
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
590

Thermal Properties

Latent Heat of Fusion, J/g 260
390
Melting Completion (Liquidus), °C 1610
660
Melting Onset (Solidus), °C 1560
550
Specific Heat Capacity, J/kg-K 440
900
Thermal Conductivity, W/m-K 25
130
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Base Metal Price, % relative 25
31
Density, g/cm3 8.3
3.0
Embodied Carbon, kg CO2/kg material 14
8.6
Embodied Energy, MJ/kg 210
160
Embodied Water, L/kg 110
1470

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
46
Strength to Weight: Axial, points 26 to 72
55
Strength to Weight: Bending, points 23 to 45
53
Thermal Diffusivity, mm2/s 6.9
49
Thermal Shock Resistance, points 24 to 68
26

Alloy Composition

Aluminum (Al), % 0
91.9 to 94.9
Carbon (C), % 1.3 to 1.4
0
Chromium (Cr), % 3.8 to 4.8
0
Copper (Cu), % 0 to 0.25
3.7 to 4.3
Iron (Fe), % 75.9 to 81.4
0 to 0.15
Lithium (Li), % 0
0.8 to 1.2
Magnesium (Mg), % 0
0.25 to 0.8
Manganese (Mn), % 0.15 to 0.4
0 to 0.25
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0 to 0.12
Silver (Ag), % 0
0.25 to 0.6
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.080 to 0.16
Residuals, % 0
0 to 0.15