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ASTM A229 Spring Steel vs. QE22A Magnesium

ASTM A229 spring steel belongs to the iron alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
80
Elastic (Young's, Tensile) Modulus, GPa 190
44
Elongation at Break, % 14
2.4
Fatigue Strength, MPa 710 to 790
110
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
17
Shear Strength, MPa 1020 to 1140
150
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
250
Tensile Strength: Yield (Proof), MPa 1100 to 1230
190

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 400
250
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 470
970
Thermal Conductivity, W/m-K 50
110
Thermal Expansion, µm/m-K 12
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
25
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
120

Otherwise Unclassified Properties

Density, g/cm3 7.8
2.0
Embodied Carbon, kg CO2/kg material 1.4
27
Embodied Energy, MJ/kg 19
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
60
Strength to Weight: Axial, points 60 to 67
36
Strength to Weight: Bending, points 40 to 43
46
Thermal Diffusivity, mm2/s 14
59
Thermal Shock Resistance, points 54 to 60
15

Alloy Composition

Carbon (C), % 0.55 to 0.85
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 97.5 to 99
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 0.3 to 1.2
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.050
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3