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EN AC-45100 Aluminum vs. SAE-AISI 9255 Steel

EN AC-45100 aluminum belongs to the aluminum alloys classification, while SAE-AISI 9255 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 EN AC-45100 aluminum and the bottom bar is SAE-AISI 9255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 97 to 130
200
Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 1.0 to 2.8
21
Fatigue Strength, MPa 82 to 99
270
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Tensile Strength: Ultimate (UTS), MPa 300 to 360
680
Tensile Strength: Yield (Proof), MPa 210 to 320
390

Thermal Properties

Latent Heat of Fusion, J/g 470
280
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 630
1430
Melting Onset (Solidus), °C 550
1390
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 140
46
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 95
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.0
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 7.9
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1100
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.5 to 7.6
120
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 710
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 30 to 35
24
Strength to Weight: Bending, points 35 to 39
22
Thermal Diffusivity, mm2/s 54
13
Thermal Shock Resistance, points 14 to 16
21

Alloy Composition

Aluminum (Al), % 88 to 92.8
0
Carbon (C), % 0
0.51 to 0.59
Copper (Cu), % 2.6 to 3.6
0
Iron (Fe), % 0 to 0.6
96.2 to 97
Lead (Pb), % 0 to 0.1
0
Magnesium (Mg), % 0.15 to 0.45
0
Manganese (Mn), % 0 to 0.55
0.7 to 1.0
Nickel (Ni), % 0 to 0.1
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 4.5 to 6.0
1.8 to 2.2
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0