Aluminum 355.0-T71, Sand Cast

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Aluminum 355.0-T71, Sand Cast
Categories:	Metal; Nonferrous Metal; Aluminum Alloy; Aluminum Casting Alloy
Material Notes:	Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN. Composition Notes: If iron exceeds 0.45%, manganese content shall not be less than one-half iron content. Composition information provided by the Aluminum Association and is not for design.
Key Words:	Aluminium 355.0-T71; UNS A03550; ISO 3522: AlSi5Cu1Mg; ISO R164: AlSi5Cu1; AA355.0-T71. Comparable to JIS AC4D-T71, LM16; Al355.0-T71
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Physical Properties	Metric	English	Comments

Density	2.71 g/cc	0.0979 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	60 - 95	60 - 95	AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop	101	101	Estimated from Brinell Hardness.
Hardness, Vickers	88	88	Estimated from Brinell Hardness.
Tensile Strength, Ultimate	>= 207 MPa	>= 30000 psi	AA
Tensile Strength, Yield	>= 152 MPa @Strain 0.2 %	>= 22000 psi @Strain 0.2 %	AA
Elongation at Break	1.5 %	1.5 %	in 50 mm
Tensile Modulus	70.3 GPa	10200 ksi	Compressive modulus in is typically about 2% higher for Al alloys
Compressive Yield Strength	205 MPa	29700 psi
Poissons Ratio	0.33	0.33
Fatigue Strength	69.0 MPa @# of Cycles 5.00e+8	10000 psi @# of Cycles 5.00e+8	Notch Status unknown, R.R. Moore Test
Machinability	50 %	50 %	0-100 Scale (100=best)
Shear Modulus	26.2 GPa	3800 ksi
Shear Strength	180 MPa	26100 psi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000440 ohm-cm	0.00000440 ohm-cm	AA; Typical 39% IACS Conductivity

Thermal Properties	Metric	English	Comments
Heat of Fusion	389 J/g	167 BTU/lb	Typical for cast aluminum
CTE, linear	22.3 µm/m-°C @Temperature 20.0 - 100 °C	12.4 µin/in-°F @Temperature 68.0 - 212 °F	AA; Typical
	24.7 µm/m-°C @Temperature 20.0 - 300 °C	13.7 µin/in-°F @Temperature 68.0 - 572 °F	AA; Typical; average over range
Specific Heat Capacity	0.963 J/g-°C	0.230 BTU/lb-°F
Thermal Conductivity	151 W/m-K	1040 BTU-in/hr-ft²-°F	AA; Typical at 25°C
Melting Point	546.1 - 621 °C	1015 - 1150 °F	AA; Typical
Solidus	546.1 °C	1015 °F	AA; Typical
Liquidus	621 °C	1150 °F	AA; Typical

Processing Properties	Metric	English	Comments
Melt Temperature	677 - 816 °C	1250 - 1500 °F
Solution Temperature	521 - 527 °C	970 - 980 °F	hold at temperature for 12 hr; cool in water at 150 to 212°F
Aging Temperature	243 - 249 °C	470 - 480 °F	hold at temperature 4 - 6 hrs; start with solution heat-treated material
Casting Temperature	677 - 788 °C	1250 - 1450 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	90.3 - 94.1 %	90.3 - 94.1 %	As remainder
Chromium, Cr	<= 0.25 %	<= 0.25 %
Copper, Cu	1.0 - 1.5 %	1.0 - 1.5 %
Iron, Fe	<= 0.60 %	<= 0.60 %
Magnesium, Mg	0.40 - 0.60 %	0.40 - 0.60 %
Manganese, Mn	<= 0.50 %	<= 0.50 %
Other, each	<= 0.05 %	<= 0.05 %
Other, total	<= 0.15 %	<= 0.15 %
Silicon, Si	4.5 - 5.5 %	4.5 - 5.5 %
Titanium, Ti	<= 0.25 %	<= 0.25 %
Zinc, Zn	<= 0.35 %	<= 0.35 %

References for this datasheet.

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MAC355071S / 9905

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