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ASTM A229 Spring Steel vs. 1050 Aluminum

ASTM A229 spring steel belongs to the iron alloys classification, while 1050 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 1050 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 14
4.6 to 37
Fatigue Strength, MPa 710 to 790
31 to 57
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
26
Shear Strength, MPa 1020 to 1140
52 to 81
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
76 to 140
Tensile Strength: Yield (Proof), MPa 1100 to 1230
25 to 120

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1410
650
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 50
230
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
61
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
200

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
8.3
Embodied Energy, MJ/kg 19
160
Embodied Water, L/kg 46
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
5.4 to 22
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
4.6 to 110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 60 to 67
7.8 to 14
Strength to Weight: Bending, points 40 to 43
15 to 22
Thermal Diffusivity, mm2/s 14
94
Thermal Shock Resistance, points 54 to 60
3.4 to 6.2

Alloy Composition

Aluminum (Al), % 0
99.5 to 100
Carbon (C), % 0.55 to 0.85
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 97.5 to 99
0 to 0.4
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.3 to 1.2
0 to 0.050
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0 to 0.25
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.050

Comparable Variants