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EN AC-42100 Aluminum vs. ASTM A229 Spring Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while ASTM A229 spring 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-42100 aluminum and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
490 to 550
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 3.4 to 9.0
14
Fatigue Strength, MPa 76 to 82
710 to 790
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
72
Tensile Strength: Ultimate (UTS), MPa 280 to 290
1690 to 1890
Tensile Strength: Yield (Proof), MPa 210 to 230
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 500
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 610
1450
Melting Onset (Solidus), °C 600
1410
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 150
50
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1110
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
3260 to 4080
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 53
24
Strength to Weight: Axial, points 30 to 31
60 to 67
Strength to Weight: Bending, points 37 to 38
40 to 43
Thermal Diffusivity, mm2/s 66
14
Thermal Shock Resistance, points 13
54 to 60

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Carbon (C), % 0
0.55 to 0.85
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.19
97.5 to 99
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
0.3 to 1.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 6.5 to 7.5
0.15 to 0.35
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0

Comparable Variants