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AWS BMg-1 vs. SAE-AISI 1070 Steel

AWS BMg-1 belongs to the magnesium alloys classification, while SAE-AISI 1070 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 SAE-AISI 1070 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
190
Elongation at Break, % 3.8
10 to 13
Fatigue Strength, MPa 72
270 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
72
Shear Strength, MPa 100
380 to 460
Tensile Strength: Ultimate (UTS), MPa 180
640 to 760
Tensile Strength: Yield (Proof), MPa 110
420 to 560

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Maximum Temperature: Mechanical, °C 130
400
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 440
1420
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 76
50
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
10
Electrical Conductivity: Equal Weight (Specific), % IACS 55
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 22
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 980
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
59 to 86
Resilience: Unit (Modulus of Resilience), kJ/m3 120
470 to 850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 66
24
Strength to Weight: Axial, points 27
23 to 27
Strength to Weight: Bending, points 39
21 to 24
Thermal Diffusivity, mm2/s 43
14
Thermal Shock Resistance, points 10
21 to 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
0.65 to 0.75
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
98.3 to 98.8
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0.6 to 0.9
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
0
Sulfur (S), % 0
0 to 0.050
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0