Aluminium is lighter than zinc, but zinc has a lower melting point. This means that manufacturing with zinc is quicker, more energy-efficient and has lower production costs. Zinc is therefore the best choice for slightly smaller products, where the weight is less important.Click to see full answer. Beside this, is zinc more expensive than Aluminium?Of the three, zinc is the most expensive, both in terms of material and installation costs. This can mean that on projects where budgets are restricted zinc can prove cost prohibitive. Aluminium is less expensive, but steel is by far the most cost-effective option due to the price of the material.Subsequently, question is, how can you tell the difference between Aluminium and zinc? Zinc is 3 times heavier then aluminum by volume. If you break it, it should look grainy. If it’s aluminum, it usually bends (if its not cast). If it’s zinc, it breaks. Beside this, is zinc alloy strong? Though some Zinc alloys can be very strong, overall stainless steel is stronger. However, zinc is a heavy element, and when alloyed with other metals it provides better corrosion resistance, stability, dimensional strength and impact strength. Ultimately, which alloy to use will depend on your casting needs.Is aluminum strong or weak?Aluminum is about one-third the weight of steel, meaning parts can be made thicker and stronger while still reducing weight in vehicles and other applications. Depending on the alloy and processing technique used, pound for pound aluminum can be forged to be just as strong if not stronger than some steel.