Cargill was able to increase the cost by 10 percent to $63.27 per ton for up to 140 percent of the amount; over that, the company charged market price, $82.71 per ton. If a salt delivery was late, the contract allowed municipalities to withhold 50 cents per ton, per day as damages. Delivery woes this past winter.
White tin is the normal form of the metal and has many uses. Unfortunately, white tin will turn into gray tin if its temperature falls below 13.2Â°C. This change can be prevented if small amounts of antimony or bismuth are added to white tin. Tin resists corrosion and is used as a protective coating on other metals. Tin cans are probably the most familiar example of this application. A tin can is actually made from steel.
Copper is much used for electrical wiring, either as a pure metal or in alloys with silver. Copper tubing was most commonly used for plumbing but nowadays PVC plastic is extensively used instead because of its much cheaper cost.Copper is also used to make jewelry and coinage.Copper is used in computers, it is used for building integrated circuts, and even chips. used in alloys like brass, bronze. it is a good conductor of electricity hence is used in electric wires. Copper has many uses, among which are: 1  Rooftops.et another answer Copper is sometimes used for covering roofs because it is much less expensive than gold, which is the very best metal to use against erosion! However, if it is situated in a corrosive atmosphere, over several years copper turns a light-green colour due to surface oxidation.