Magnesium QH21A-T6, Cast

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Magnesium QH21A-T6, Cast
Categories:	Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:	Good castability, pressure tight, creep resistance and high yield strength to 250°C.
Key Words:	Mg
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Physical Properties	Metric	English	Comments

Density	1.83 g/cc	0.0661 lb/in³

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	275 MPa	39900 psi
	97.0 MPa @Temperature 315 °C, Time 601 sec	14100 psi @Temperature 599 °F, Time 0.167 hour	tested at elevated temperature
	235 MPa @Temperature 150 °C, Time 601 sec	34100 psi @Temperature 302 °F, Time 0.167 hour	tested at elevated temperature
Tensile Strength, Yield	205 MPa @Strain 0.2 %	29700 psi @Strain 0.2 %
Elongation at Break	4.0 %	4.0 %	in 50 mm
Modulus of Elasticity	45.0 GPa	6530 ksi
Compressive Yield Strength	210 MPa	30500 psi	Machined specimen with L/D less than or equal to 3
Poissons Ratio	0.32	0.32	Calculated
Fatigue Strength	105 MPa @# of Cycles 5.00e+7	15200 psi @# of Cycles 5.00e+7	unnotched
Machinability	100 %	100 %	Relative Rating, 100=Best
Shear Modulus	17.0 GPa	2470 ksi	Estimated from similar Mg alloys.

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000685 ohm-cm	0.00000685 ohm-cm

Thermal Properties	Metric	English	Comments
Heat of Fusion	370 J/g	159 BTU/lb	Estimated from trends in similar Mg alloys.
CTE, linear	26.7 µm/m-°C @Temperature 0.000 - 100 °C	14.8 µin/in-°F @Temperature 32.0 - 212 °F
	27.0 µm/m-°C @Temperature 20.0 - 200 °C	15.0 µin/in-°F @Temperature 68.0 - 392 °F	Estimated from similar Mg alloys
Specific Heat Capacity	1.00 J/g-°C	0.239 BTU/lb-°F	Typical Mg alloy value.
Thermal Conductivity	113 W/m-K	784 BTU-in/hr-ft²-°F
Melting Point	535 - 640 °C	995 - 1180 °F
Solidus	535 °C	995 °F
Liquidus	640 °C	1180 °F

Processing Properties	Metric	English	Comments
Casting Temperature	820 - 850 °C	1510 - 1560 °F	Sand Casting

Component Elements Properties	Metric	English	Comments
Copper, Cu	<= 0.10 %	<= 0.10 %
Magnesium, Mg	95 %	95 %	As Remainder
Neodymium, Nd	0.60 - 1.5 %	0.60 - 1.5 %	Nd-rich rare earths
Nickel, Ni	<= 0.010 %	<= 0.010 %
Silver, Ag	2.0 - 3.0 %	2.0 - 3.0 %
Thorium, Th	0.60 - 1.6 %	0.60 - 1.6 %
Zinc, Zn	<= 0.20 %	<= 0.20 %
Zirconium, Zr	0.40 - 1.0 %	0.40 - 1.0 %

References for this datasheet.

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MMQH21 / 12461

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