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AWS BMg-1 vs. Grade 250 Maraging Steel

AWS BMg-1 belongs to the magnesium alloys classification, while grade 250 maraging steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, 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 grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
190
Elongation at Break, % 3.8
7.3 to 17
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
75
Shear Strength, MPa 100
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 180
970 to 1800
Tensile Strength: Yield (Proof), MPa 110
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 440
1430
Specific Heat Capacity, J/kg-K 980
450
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
32
Density, g/cm3 1.8
8.2
Embodied Carbon, kg CO2/kg material 22
4.9
Embodied Energy, MJ/kg 160
65
Embodied Water, L/kg 980
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
130 to 150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 66
23
Strength to Weight: Axial, points 27
33 to 61
Strength to Weight: Bending, points 39
26 to 40
Thermal Shock Resistance, points 10
29 to 54

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0.050 to 0.15
Beryllium (Be), % 0.00020 to 0.00080
0
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0
0 to 0.030
Cobalt (Co), % 0
7.0 to 8.5
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
66.3 to 71.1
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 0 to 0.0050
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.050
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zinc (Zn), % 1.7 to 2.3
0
Zirconium (Zr), % 0
0 to 0.020
Residuals, % 0 to 0.3
0