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AZ91A Magnesium vs. EN 1.4646 Stainless Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.4646 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, 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 AZ91A magnesium and the bottom bar is EN 1.4646 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
220
Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
34
Fatigue Strength, MPa 99
340
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 140
500
Tensile Strength: Ultimate (UTS), MPa 240
750
Tensile Strength: Yield (Proof), MPa 160
430

Thermal Properties

Latent Heat of Fusion, J/g 360
290
Maximum Temperature: Mechanical, °C 130
910
Melting Completion (Liquidus), °C 600
1390
Melting Onset (Solidus), °C 470
1340
Specific Heat Capacity, J/kg-K 990
480
Thermal Expansion, µm/m-K 26
17

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 990
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
220
Resilience: Unit (Modulus of Resilience), kJ/m3 280
460
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
27
Strength to Weight: Bending, points 49
24
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.020 to 0.1
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.1
1.5 to 3.0
Iron (Fe), % 0
59 to 67.3
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
10.5 to 12.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.030
3.5 to 4.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.35 to 1.0
0