Zinc ZA-27 (Zn-27Al-2Cu-0.015Mg), Die Cast

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Zinc ZA-27 (Zn-27Al-2Cu-0.015Mg), Die Cast
Categories:	Metal; Nonferrous Metal; Zinc Alloy
Material Notes:	Used in bearing applications. ZA-27 has a higher bearing load capacity than bronze bearing alloys, although its environment (both temperature and corrosive) is more limited.
Key Words:	Zinc Foundry Alloy; UNS Z35841 (Castings); UNS Z35840 (Ingot)
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Physical Properties	Original Value	Comments

Density	5.02 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	119	500 kg load; 10 mm hardened steel ball
Hardness, Knoop	120	Estimated from Brinell Value
Hardness, Rockwell A	40	Estimated from Brinell Value
Hardness, Rockwell B	60	Estimated from Brinell Value
Hardness, Vickers	107	Estimated from Brinell Value
Tensile Strength, Ultimate	426 MPa @Diameter 6.35 mm
Tensile Strength, Yield	371 MPa @Strain 0.2 %
Elongation at Break	2.5 %	in 5 cm
Modulus of Elasticity	77.9 GPa
Compressive Strength	359 MPa	0.1% offset
Fatigue Strength	117 MPa @# of Cycles 5.00e+8	Reverse Bending
Shear Strength	325 MPa
Charpy Impact, Unnotched	12.0 J @Thickness 6.35 mm	square bar
Coefficient of Friction	0.030 - 0.070

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000580 ohm-cm

Thermal Properties	Original Value	Comments
Heat of Fusion	128 J/g
CTE, linear	26.0 µm/m-°C @Temperature 20.0 - 200 °C
Specific Heat Capacity	0.525 J/g-°C
Thermal Conductivity	125 W/m-K
Melting Point	376 - 484 °C
Solidus	376 °C
Liquidus	484 °C

Processing Properties	Original Value	Comments
Casting Temperature	515 - 545 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	25 - 28 %	Addition, Casting
	25.5 - 28 %	Addition, Ingot form
Cadmium, Cd	<= 0.0050 %	Impurity, Ingot form
	<= 0.0060 %	Impurity, Casting
Copper, Cu	2.0 - 2.5 %	Addition, Casting
	2.0 - 2.5 %	Addition, Ingot form
Iron, Fe	<= 0.072 %	Impurity, Ingot form
	<= 0.075 %	Impurity, Casting
Lead, Pb	<= 0.0050 %	Impurity, Ingot form
	<= 0.0060 %	Impurity, Casting
Magnesium, Mg	0.010 - 0.020 %	Addition, Casting
	0.012 - 0.020 %	Addition, Ingot form
Tin, Sn	<= 0.0020 %	Impurity, Ingot form
	<= 0.0030 %	Impurity, Casting
Zinc, Zn	69.396 - 72.488 %	As balance; Ingot per ASTM B 669
	69.39 - 72.99 %	As balance; Castings per ASTM B 791

Descriptive Properties
Damping	10.9 Q^-1 x 10³	at 100 Hz, 100°C
	5 Q^-1 x 10³	at 100 Hz, 20°C

References for this datasheet.

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MZN27C / 14522

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