The primary component of pot metal is zinc, but often the caster adds other metals to the mix to strengthen the cast part, improve flow of the molten metal, or to reduce cost. With a low melting point of 419 Â°C (786 Â°F), zinc is often alloyed with other metals including lead, tin, aluminium, and copper.
Although beer has a lower freezing point than water, it will freeze if left in a freezer for too long. The exact length of time varies depending on the beer.A frozen beer can sometimes be saved, but it usually isn't something you'd want to drink as it's often flat. However, all is not lost.he actual freezing point varies depending on the beer's content. Initially, some of the water freezes out of the solution. This is fractional freezing and is used in creating eisbock, a high-alcohol beer. However, be aware that as the water freezes, it expands; this can force the cap off a bottle.
Jamie and Adam decide to benchmark the conventional methods of cooling a beer (e.g. cooler with ice, fridge, freezer, et. al.) to see how long they take to cool to about 35-40F. They test the room temperature beer to get a reference point, 62.9F. Then they set up three coolers, one with ice, one with ice water, and one with ice salt water. They also place some beer in the freezer and some in the refrigerator; they plan to test every five minutes to see if it's at drinkable temperature. Meanwhile, they place a six-pack in a bucket and spray it with a fire extinguisher. After three minutes, the beer is at the ideal temperature. At five minutes, the beer in the ice and salt water is done, the fastest of the conventional (and economically feasible) methods. Ice water is next with fifteen, and the freezer is done at 25.