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AWS BMg-1 vs. ACI-ASTM CA15M Steel

AWS BMg-1 belongs to the magnesium alloys classification, while ACI-ASTM CA15M steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 AWS BMg-1 and the bottom bar is ACI-ASTM CA15M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
200
Elongation at Break, % 3.8
20
Fatigue Strength, MPa 72
330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Tensile Strength: Ultimate (UTS), MPa 180
690
Tensile Strength: Yield (Proof), MPa 110
510

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Maximum Temperature: Mechanical, °C 130
760
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 440
1410
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 76
27
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 55
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.5
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 22
2.1
Embodied Energy, MJ/kg 160
29
Embodied Water, L/kg 980
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
130
Resilience: Unit (Modulus of Resilience), kJ/m3 120
670
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 66
25
Strength to Weight: Axial, points 27
25
Strength to Weight: Bending, points 39
22
Thermal Diffusivity, mm2/s 43
7.2
Thermal Shock Resistance, points 10
25

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Beryllium (Be), % 0.00020 to 0.00080
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
11.5 to 14
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
82.1 to 88.4
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
0.15 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
0 to 0.65
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0