Zamak 12

zamak
Project Description

ZnAl11Cu1 / ZL12 / Zamak 12

Zamak 12

Zamak 12 is the best gravity casting alloy for sand, permanent mold and the graphite mold casting process. It is also a good (cold chamber) die casting alloy.

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zamak

Zamak 12 is the most versatile zinc alloy in terms of combining high performance properties and ease of fabrication using either gravity or pressure die casting

For these reasons, die cast Zamak 12 often competes with Zamak 27 for strength application. An excellent bearing alloy, Zamak 12 is also palatable, although plating adhesion is reduced compared to the zinc alloys

It holds more difficult coating
Ideal for gravity casting
Can use in cold chamber metal injection
Chemical, Physical and Mechanical Properties

Zamak 12 Chemical Analysis

Analysis  ( %) Zamak 12 / ZnAl11Cu1
Al 10.8 – 11.5
Cu 0.5 – 1.2
Mg 0.02 – 0.03
Pb ≤0.005
Fe ≤0.05
Cd ≤0.005
Sn ≤0.002
Si ≤0.05
Ni ≤0.001

Zamak 12 General Mechanical Properties

Mechanical Properties Metric Value
Ultimate Tensile Strength 400 MPa
Yield Strength (0.2% offset) 317 MPa
Impact Strength 29 J
Elongation % in 2 4 – 7
Shear Strength 296 MPa
Compressive Yield Strength 269 MPa
Fatigue Strength (reverse bending 5×108cycles) 117 MPa
Hardness 95 – 115 Brinell

Zamak 12 General Physical Properties

Physical Properties Metric Value
Solidification Range (melting range) 377 – 432 C
Density 6.0 kg/dm3
Coefficient of Thermal Expansion 24.2 μm/m-°C
Thermal Conductivity 116.1 W/mK
Specific Heat Capacity 448 J/kg-°C