EQ21A (EQ21A-T6, M18330) Magnesium
Magnesium Alloys
Property Overview
Density1.9g/cm³
Elastic Modulus44GPa
Tensile Strength250MPa
Yield Strength190MPa
Brinell Hardness80HB
Maximum Service Temperature160°C
Chemical Composition
NI
0 to 0.010%
CU
0.050 to 0.1%
AG
1.3 to 1.7%
MG
93.9 to 96.8%
RES.
Residuals res. | | 0 to 0.3%
RESIDUALS RES.
0 to 0.3%
UNSPECIFIED RARE EARTHS RARE E.
1.5 to 3.0%
ZR
0.4 to 1.0%
Mechanical
Compressive (Crushing) Strength
350 MPa
Elastic (Young's, Tensile) Modulus
44 GPa
Elongation at Break
2.4 %
Fatigue Strength
110 MPa
Fracture Toughness
16 MPa-m 1/2
Poisson's Ratio
0.29
Shear Modulus
17 GPa
Shear Strength
150 MPa
Tensile Strength: Ultimate (UTS)
250 MPa
Tensile Strength: Yield (Proof)
190 MPa
Hardness
Brinell Hardness
80
Physical
Density
1.9 g/cm 3
Thermal
Latent Heat of Fusion
340 J/g
Maximum Temperature: Mechanical
160 °C
Melting Completion (Liquidus)
640 °C
Melting Onset (Solidus)
560 °C
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
980 J/kg-K
Thermal Conductivity
110 W/m-K
Thermal Diffusivity
62 mm 2 /s
Thermal Expansion
27 µm/m-K
Thermal Shock Resistance
15 points
Electrical
Electrical Conductivity: Equal Volume
25 % IACS
Electrical Conductivity: Equal Weight (Specific)
120 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
5.6 MJ/m 3
Resilience: Unit (Modulus of Resilience)
410 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
63 points
Strength to Weight: Axial
37 points
Strength to Weight: Bending
47 points
Environmental
Base Metal Price
80 % relative
Embodied Carbon
27 kg CO 2 /kg material
Embodied Energy
210 MJ/kg
Embodied Energy
210 MJ/kg 89 x 10 3 BTU/lb
Registered Designations & Aliases
EQ21A (EQ21A-T6, M18330) MagnesiumEQ21A-T6M18330
Standards
ASTM B199 ASTM B199: Standard Specification for Magnesium-Alloy Permanent Mold Castings
ASTM B403 ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings
ASTM B80 ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings