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850.0 Aluminum vs. ASTM A229 Spring Steel

850.0 aluminum belongs to the aluminum alloys classification, while ASTM A229 spring steel belongs to the iron alloys. There are 31 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 850.0 aluminum and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45
490 to 550
Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 7.9
14
Fatigue Strength, MPa 59
710 to 790
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
72
Shear Strength, MPa 100
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 140
1690 to 1890
Tensile Strength: Yield (Proof), MPa 76
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 190
400
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 370
1410
Specific Heat Capacity, J/kg-K 850
470
Thermal Conductivity, W/m-K 180
50
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 47
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
1.8
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.5
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 1160
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 42
3260 to 4080
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 44
24
Strength to Weight: Axial, points 12
60 to 67
Strength to Weight: Bending, points 19
40 to 43
Thermal Diffusivity, mm2/s 69
14
Thermal Shock Resistance, points 6.1
54 to 60

Alloy Composition

Aluminum (Al), % 88.3 to 93.1
0
Carbon (C), % 0
0.55 to 0.85
Copper (Cu), % 0.7 to 1.3
0
Iron (Fe), % 0 to 0.7
97.5 to 99
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0.3 to 1.2
Nickel (Ni), % 0.7 to 1.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.7
0.15 to 0.35
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0
Residuals, % 0 to 0.3
0