Magnesium EQ-21A-T6, Sand/Permanent Mold Castings

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Magnesium EQ-21A-T6, Sand/Permanent Mold Castings
Categories:	Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:	Typically used for commercial and military sand and permanent-mold castings used in the solution-treated and artificially aged condition (T6 temper) with high yield strengths up to 200°C. Alloy is equivalent to QE22A, but with lower silver content, and thus lower cost. Castings have excellent short-time elevated-temperature mechanical properties and are pressure tight and weldable.
Key Words:	UNS M18330; European EN 1753 MC65220; AMS 4417; ASTM B 80; ASTM B 199; ASTM B 403 (Ingot UNS M18330)
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Physical Properties	Original Value	Comments

Density	1.81 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	65 - 85	500 kg load, 10 mm ball
Tensile Strength, Ultimate	34000 psi
Tensile Strength, Yield	28000 psi
Elongation at Break	2.0 %	in 50 mm
Tensile Modulus	45.0 GPa
Compressive Yield Strength	28000 psi
Compressive Strength	50000 psi
Poissons Ratio	0.35
Fatigue Strength	54.0 MPa @# of Cycles 1.00e+8	Rotating Beam, R=-1, Notched, K_t=2
	58.0 MPa @# of Cycles 1.00e+6	Rotating Beam, R=-1, Notched, K_t=2
	96.0 MPa @# of Cycles 5.00e+7	Unnotched, Rotating Beam, R=-1
	98.0 MPa @# of Cycles 1.00e+7	Unnotched, Rotating Beam, R=-1
	100 MPa @# of Cycles 1.00e+6	Unnotched, Rotating Beam, R=-1
	113 MPa @# of Cycles 100000	Unnotched, Rotating Beam, R=-1
Shear Modulus	17.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000685 ohm-cm

Thermal Properties	Original Value	Comments
Heat of Fusion	374 J/g
CTE, linear	26.7 µm/m-°C @Temperature 20.0 - 200 °C
Specific Heat Capacity	1.00 J/g-°C
Thermal Conductivity	113 W/m-K
Melting Point	540 - 640 °C
Solidus	540 °C
Liquidus	640 °C

Processing Properties	Original Value	Comments
Casting Temperature	750 - 820 °C	Sand Casting

Component Elements Properties	Original Value	Comments
Copper, Cu	0.050 - 0.10 %
Magnesium, Mg	95.7 %	As Remainder
Neodymium, Nd	1.5 - 3.0 %	Nd-rich rare earths
Nickel, Ni	<= 0.010 %
Other, total	<= 0.30 %
Silver, Ag	1.3 - 1.7 %
Zirconium, Zr	0.40 - 1.0 %

References for this datasheet.

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MMEQ22 / 12421

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