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ASTM A229 Spring Steel vs. EN AC-45300 Aluminum

ASTM A229 spring steel belongs to the iron alloys classification, while EN AC-45300 aluminum belongs to the aluminum 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 ASTM A229 spring steel and the bottom bar is EN AC-45300 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
94 to 120
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 14
1.0 to 2.8
Fatigue Strength, MPa 710 to 790
59 to 72
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
27
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
220 to 290
Tensile Strength: Yield (Proof), MPa 1100 to 1230
150 to 230

Thermal Properties

Latent Heat of Fusion, J/g 250
470
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1450
630
Melting Onset (Solidus), °C 1410
590
Specific Heat Capacity, J/kg-K 470
890
Thermal Conductivity, W/m-K 50
150
Thermal Expansion, µm/m-K 12
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
36
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
120

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.4
8.0
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 46
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
2.7 to 5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
160 to 390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 60 to 67
23 to 29
Strength to Weight: Bending, points 40 to 43
30 to 35
Thermal Diffusivity, mm2/s 14
60
Thermal Shock Resistance, points 54 to 60
10 to 13

Alloy Composition

Aluminum (Al), % 0
90.2 to 94.2
Carbon (C), % 0.55 to 0.85
0
Copper (Cu), % 0
1.0 to 1.5
Iron (Fe), % 97.5 to 99
0 to 0.65
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.35 to 0.65
Manganese (Mn), % 0.3 to 1.2
0 to 0.55
Nickel (Ni), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
4.5 to 5.5
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15

Comparable Variants