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M A Z A K  8

Z n A l 8 C u 1
EN1774 ZL0810, R301(ZnAl8Cu1)

Mazak 8 is a creep resisting high strength alloy for hot chamber pressure diecasting. It offers significant advantages in elevated temperature applications subject to continuous stress such as automotive underbonnet parts, electrical components and pneumatic equipment. The yeild strength of pressure diecast Mazak 8 is very high which combined with its good wear resistance makes it especially suitable for parts such as gears and mechanical linkages.

Mazak 8 can also be gravity diecast to produce parts with good surface finish suitable for subsequent electroplating. It is less prone to shrinkage problems than zinc alloys containing higher quantities of aluminium and still offers good mechanical properties.

Mechanical Properties As-cast Aged Gravity
Tensile Strength (MPa) 375 300 220 - 255
Yield Strength (MPa) 240 225 210
Shear Strength (MPa) 275 227 241
Elongation (% in 51mm) 6 - 10 20 1 - 2
Hardness (Brinell - 500Kg) 100 - 106 91 85 - 95
Impact Strength (Energy, Joules) 42 17
Fatigue Strength 5 x 108 cycles (MPa) 103 52


Physical properties  
Density 6,700 Kg/m3 at 21°C
Solidification shrinkage 1.1%
Casting shrinkage 0.7% (pressure diecast)
Freezing range 375 - 404°C
Casting temperature 415 - 430°C
Specific heat capacity 435.4 J/Kg/°C at 20 - 100°C
Thermal expansion 23.3 x 10-6 linear per °C at 20 - 100°C
Thermal conductivity 114.7 W/m/hr/m2/°C at 70 - 140°C
Electrical conductivity 27.7% IACS
Electrical resistance 6.2 u ohm cm at 20°C


TYPICAL ANALYSIS

Alloying elements  
Aluminum 8.6%
Copper 1.1%
Magnesium 0.025%
 
Impurities  
Iron < 0.03%
Lead < 0.003%
Cadmium < 0.003%
Tin < 0.001%
Nickel < 0.001%
Thallium < 0.001%
Indium < 0.0005%
Manganese < 0.01%