Magnesium AZ91C-T6, Cast

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Magnesium AZ91C-T6, Cast
Categories:	Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:	AZ91A, B, C, D, and E have the same nominal composition but differ in ranges and/or specified impurity limits. This alloy is used in sand cast and permanent-mold castings when maximum corrosion resistance is not required. General purpose alloy, high strength.
Key Words:	UNS M11914; Mg; European EN 1753 MC 21120; AMS 4437; ASTM B 80; ASTM B 403; SAE J465; Old SAE 504 (Ingot UNS M11915)
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Physical Properties	Metric	English	Comments

Density	1.81 g/cc	0.0654 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	70	70	500 kg load, 10 mm ball
Hardness, Knoop	93	93	Estimated from Brinell
Hardness, Rockwell E	77	77
Hardness, Vickers	80	80	Estimated from Brinell
Tensile Strength, Ultimate	275 MPa	39900 psi
	305 MPa @Temperature -78.0 °C	44200 psi @Temperature -108 °F
	310 MPa @Temperature -196 °C	45000 psi @Temperature -321 °F
Tensile Strength, Yield	150 MPa @Temperature -78.0 °C	21800 psi @Temperature -108 °F
	180 MPa @Temperature -196 °C	26100 psi @Temperature -321 °F
	145 MPa @Strain 0.2 %	21000 psi @Strain 0.2 %
Elongation at Break	6.0 %	6.0 %	in 50 mm
	1.7 % @Temperature -196 °C	1.7 % @Temperature -321 °F
	5.1 % @Temperature -78.0 °C	5.1 % @Temperature -108 °F
Tensile Modulus	44.8 GPa	6500 ksi
Compressive Yield Strength	145 MPa	21000 psi	at 0.2% offset
Ultimate Bearing Strength	515 MPa	74700 psi
Bearing Yield Strength	360 MPa	52200 psi
Poissons Ratio	0.35	0.35
Fatigue Strength	55.0 MPa @# of Cycles 1.00e+8	7980 psi @# of Cycles 1.00e+8	Notched Fatigue, Rotating Beam, R=-1, Notched, Sand cast
	65.0 MPa @# of Cycles 1.00e+7	9430 psi @# of Cycles 1.00e+7	Unnotched Fatigue, Krouse plate bending, R=-1, Sand cast
	75.0 MPa @# of Cycles 1.00e+6	10900 psi @# of Cycles 1.00e+6	Notched Fatigue, Rotating Beam, R=-1, Notched, Sand cast
	80.0 MPa @# of Cycles 1.00e+8	11600 psi @# of Cycles 1.00e+8	Notched Fatigue, Rotating Beam, R=-1, Smooth, Sand cast
	85.0 MPa @# of Cycles 5.00e+8	12300 psi @# of Cycles 5.00e+8	R.R. Moore Test
	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 1.00e+7	13100 psi @# of Cycles 1.00e+7	Notched Fatigue, Rotating Beam, R=-1, Smooth, Sand cast
	105 MPa @# of Cycles 1.00e+6	15200 psi @# of Cycles 1.00e+6	Notched Fatigue, Rotating Beam, R=-1, Smooth, Sand cast
	105 MPa @# of Cycles 100000	15200 psi @# of Cycles 100000	Unnotched Fatigue, Krouse plate bending, R=-1, Sand cast
	125 MPa @# of Cycles 100000	18100 psi @# of Cycles 100000
Shear Modulus	17.0 GPa	2470 ksi
Shear Strength	145 MPa	21000 psi
Charpy Impact	1.40 J	1.03 ft-lb	V-notch
	1.02 J @Temperature -196 °C	0.752 ft-lb @Temperature -321 °F	Notched
	1.36 J @Temperature -78.0 °C	1.00 ft-lb @Temperature -108 °F	Notched
Charpy Impact, Unnotched	4.06 J @Temperature -196 °C	2.99 ft-lb @Temperature -321 °F
	6.26 J @Temperature -78.0 °C	4.62 ft-lb @Temperature -108 °F
	7.96 J @Temperature 24.0 °C	5.87 ft-lb @Temperature 75.2 °F

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000129 ohm-cm	0.0000129 ohm-cm

Thermal Properties	Metric	English	Comments
Heat of Fusion	373 J/g	160 BTU/lb
CTE, linear	26.0 µm/m-°C @Temperature 25.0 °C	14.4 µin/in-°F @Temperature 77.0 °F
	27.2 µm/m-°C @Temperature 20.0 - 200 °C	15.1 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	1.047 J/g-°C	0.2502 BTU/lb-°F
Thermal Conductivity	72.7 W/m-K	505 BTU-in/hr-ft²-°F
Melting Point	>= 421 °C	>= 790 °F	Incipient Melting
Solidus	470 °C	878 °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	8.1 - 9.3 %	8.1 - 9.3 %
Copper, Cu	<= 0.10 %	<= 0.10 %
Magnesium, Mg	90 %	90 %	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.

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MMAZ90 / 12334

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