This type of ingot is used for high-temperature burning, and even used in hot-temperature burning fuels. Metal ingot is another used for burning fuels in steel kilns, and evenars.
Medium-sized ingots are made of steel wire, plastic, or metal and are the most common type. On Alibaba.com, you can find medium-sized ingots of steel and gold ingots for sale, and for the most common shapes, they are divided into two main types: medium-sized ingots and steel ingots.