Magnesium AZ81A-T4, Cast

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Magnesium AZ81A-T4, Cast
Categories:	Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:	Sand Castings: ASTM B 80. Permanent Mold Castings: ASTM B 199. Investment Castings: B403. Readily castable, has a low microshrinkage tendency, and is used in the solution-treated condition (T4 temper). Typically used for commercial and military permanent-mold and investment castings requiring good strength and excellent ductility and toughness. Good castability tough, pressure tight.
Key Words:	UNS M11810; Electron A8; Mg; ASTM B 80; ASTM B 199; ASTM B 403; SAE J465; Old SAE 505; European EN 1753 MC21110 (Ingot UNS M11811)
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Physical Properties	Metric	English	Comments

Density	1.80 g/cc	0.0650 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	55	55	500 kg load, 10 mm ball
Hardness, Knoop	70	70	Estimated from Brinell
Hardness, Rockwell E	66	66
Tensile Strength, Ultimate	275 MPa	39900 psi
Tensile Strength, Yield	83.0 MPa @Strain 0.2 %	12000 psi @Strain 0.2 %
Elongation at Break	15 %	15 %	in 50 mm
Tensile Modulus	45.0 GPa	6530 ksi
Compressive Yield Strength	83.0 MPa	12000 psi	at 0.2% offset
Ultimate Bearing Strength	400 MPa	58000 psi
Bearing Yield Strength	240 MPa	34800 psi
Poissons Ratio	0.34	0.34
Fatigue Strength	76.0 MPa @# of Cycles 1.00e+8	11000 psi @# of Cycles 1.00e+8	R.R. Moore Test
Machinability	100 %	100 %	Relative Rating, 100=Best
Shear Modulus	17.0 GPa	2470 ksi
Shear Strength	125 MPa	18100 psi
Charpy Impact	6.10 J	4.50 ft-lb	V-notch

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000150 ohm-cm	0.0000150 ohm-cm

Thermal Properties	Metric	English	Comments
Heat of Fusion	370 J/g	159 BTU/lb
CTE, linear	25.0 µm/m-°C @Temperature 0.000 - 100 °C	13.9 µin/in-°F @Temperature 32.0 - 212 °F
	27.2 µm/m-°C @Temperature 20.0 - 200 °C	15.1 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	1.00 J/g-°C	0.239 BTU/lb-°F
Thermal Conductivity	51.1 W/m-K	355 BTU-in/hr-ft²-°F
Melting Point	>= 421 °C	>= 790 °F	Incipient Melting
Solidus	490 °C	914 °F
Liquidus	610 °C	1130 °F

Processing Properties	Metric	English	Comments
Casting Temperature	705 - 845 °C	1300 - 1550 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	7.0 - 8.1 %	7.0 - 8.1 %
Copper, Cu	<= 0.10 %	<= 0.10 %
Magnesium, Mg	92 %	92 %	As Remainder
Manganese, Mn	>= 0.13 %	>= 0.13 %
Nickel, Ni	<= 0.010 %	<= 0.010 %
Silicon, Si	<= 0.30 %	<= 0.30 %
Zinc, Zn	0.40 - 1.0 %	0.40 - 1.0 %

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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MMAZ84 / 12332

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