Magnesium AZ92A-T4, Cast

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Magnesium AZ92A-T4, Cast
Categories:	Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:	A, B, C, D, and E Have the same nominal composition but differ in ranges and/or specified impurity limits. Sand Casting: AMS 4434, ASTM B 80; Investment Casting: AMS 4453, ASTM B 403; Permanent Mold Casting: AMS 4484, ASTM B 199; Typically used for commercial and military pressure-tight sand and permanent-mold castings having high tensile strength and good yield strength.
Key Words:	UNS M11920; Mg; SAE J465; Old SAE 500; AMS 4434; AMS 4453; AMS 4484; ASTM B 80; ASTM B 199; ASTM B 403 (Ingot UNS M11921)
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Physical Properties	Metric	English	Comments

Density	1.83 g/cc	0.0661 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	63	63	500 kg load, 10 mm ball
Hardness, Knoop	84	84	Estimated from Brinell
Hardness, Rockwell E	75	75
Hardness, Vickers	70	70	Estimated from Brinell
Tensile Strength, Ultimate	275 MPa	39900 psi
Tensile Strength, Yield	97.0 MPa @Strain 0.2 %	14100 psi @Strain 0.2 %
Elongation at Break	10 %	10 %	in 50 mm
Tensile Modulus	45.0 GPa	6530 ksi
Compressive Yield Strength	97.0 MPa	14100 psi	at 0.2% offset
Ultimate Bearing Strength	470 MPa	68200 psi
Bearing Yield Strength	315 MPa	45700 psi
Poissons Ratio	0.35	0.35
Fatigue Strength	40.0 MPa @# of Cycles 1.00e+8	5800 psi @# of Cycles 1.00e+8	Notched Fatigue, Notched, K_t=5, Rotating Beam, Sand cast
	55.0 MPa @# of Cycles 1.00e+6	7980 psi @# of Cycles 1.00e+6	Notched Fatigue, Notched, K_t=5, Rotating Beam, Sand cast
	60.0 MPa @# of Cycles 1.00e+7	8700 psi @# of Cycles 1.00e+7	Unnotched Fatigue, Krouse plate bending, R=-1, Sand cast
	75.0 MPa @# of Cycles 1.00e+8	10900 psi @# of Cycles 1.00e+8	Notched Fatigue, Notched, K_t=2, Rotating Beam, Sand cast
	85.0 MPa @# of Cycles 1.00e+6	12300 psi @# of Cycles 1.00e+6	Unnotched Fatigue, Krouse plate bending, R=-1, Sand cast
	90.0 MPa @# of Cycles 5.00e+8	13100 psi @# of Cycles 5.00e+8	Notched Fatigue, 5x Smooth, Rotating Beam, Sand cast
	90.0 MPa @# of Cycles 5.00e+8	13100 psi @# of Cycles 5.00e+8	R.R. Moore Test
	95.0 MPa @# of Cycles 1.00e+8	13800 psi @# of Cycles 1.00e+8	Notched Fatigue, Smooth, Rotating Beam, Sand cast
	100 MPa @# of Cycles 1.00e+6	14500 psi @# of Cycles 1.00e+6	Notched Fatigue, Notched, K_t=2, Rotating Beam, Sand cast
	105 MPa @# of Cycles 1.00e+7	15200 psi @# of Cycles 1.00e+7	Notched Fatigue, Smooth, Rotating Beam, Sand cast
	105 MPa @# of Cycles 100000	15200 psi @# of Cycles 100000	Unnotched Fatigue, Krouse plate bending, R=-1, Sand cast
	110 MPa @# of Cycles 1.00e+6	16000 psi @# of Cycles 1.00e+6	Notched Fatigue, Smooth, Rotating Beam, Sand cast
	125 MPa @# of Cycles 100000	18100 psi @# of Cycles 100000	Notched Fatigue, Smooth, Rotating Beam, Sand cast
	205 MPa @# of Cycles 1.00e+7	29700 psi @# of Cycles 1.00e+7	Unnotched Fatigue, Axial, R=0.25, Sand cast
	215 MPa @# of Cycles 1.00e+6	31200 psi @# of Cycles 1.00e+6	Unnotched Fatigue, Axial, R=0.25, Sand cast
	235 MPa @# of Cycles 100000	34100 psi @# of Cycles 100000	Unnotched Fatigue, Axial, R=0.25, Sand cast
Machinability	100 %	100 %	Relative Rating, 100=Best
Shear Modulus	17.0 GPa	2470 ksi
Shear Strength	140 MPa	20300 psi
Charpy Impact	2.70 J	1.99 ft-lb	V-notch

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000168 ohm-cm	0.0000168 ohm-cm

Thermal Properties	Metric	English	Comments
Heat of Fusion	373 J/g	160 BTU/lb
CTE, linear	26.0 µm/m-°C @Temperature 0.000 - 100 °C	14.4 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	1.05 J/g-°C	0.251 BTU/lb-°F
Thermal Conductivity	44.3 W/m-K	307 BTU-in/hr-ft²-°F
Melting Point	>= 410 °C	>= 770 °F	Incipient Melting
Solidus	445 °C	833 °F
Liquidus	595 °C	1100 °F

Processing Properties	Metric	English	Comments
Casting Temperature	650 - 815 °C	1200 - 1500 °F	Permanent Mold Casting
	705 - 845 °C	1300 - 1550 °F	Sand Casting

Component Elements Properties	Metric	English	Comments
Aluminum, Al	8.3 - 9.7 %	8.3 - 9.7 %
Copper, Cu	<= 0.25 %	<= 0.25 %
Magnesium, Mg	89 %	89 %	As Remainder
Manganese, Mn	>= 0.10 %	>= 0.10 %
Nickel, Ni	<= 0.010 %	<= 0.010 %
Silicon, Si	<= 0.30 %	<= 0.30 %
Zinc, Zn	1.6 - 2.4 %	1.6 - 2.4 %

References for this datasheet.

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MMAZ99 / 12346

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