Most often, though casting design procedures, and alloy ZAMAK- 3 pressure die casting can be made to meet service or functional requirements. When this is not the case, especially where strength is concerned, ZAMAK- 5 is the logical choice. Except for a nominal 1% copper addition, the chemistry of ZAMAK- 5 is comparable to that of ZAMAK- 3. This composition modification results in higher tensile strength and increased hardness, with a sacrifice in elongation. ZAMAK- 5 also has significantly better creep resistance than the other alloys in the conventional group.
Zamak-5 is not as ductile as some of other alloys, a factor to consider when post casting operations are required, Because of the copper content, trim scrap should be segregated.
|Alloying Elements (%)|
|Al||–||3.9 – 4.3|
|Cu||–||0.75 – 1.25|
|Mg||–||0.04 – 0.06|
|Compressive Strength (psi)||–||87000|
|Tensile Strength (psi)||–||48000|
|Melting Points 0C||–||405|