How is stainless steel manufactured?
Initially, chromite is crushed and turned into chromite concentrate. The chromite concentrate is taken to a facility with a sintering plant and electric smelting furnaces. The concentrate is combined with other raw materials and converted into ferrochrome, which is a key component of all stainless steels. From there, the ferrochrome is taken to a steel melting shop and melted down with recycled steel, nickel and molybdenum oxide. The end product is a slab of stainless steel that must then undergo hot-rolling and cold-rolling processes.
The hot-rolling process turns the slabs of stainless steel into coiled bands. This is done by transporting the slabs to a furnace and heating them to a temperature of more than 1,000 degrees Celsius. The slabs are rolled backward and forward, eventually forming a band-like shape with reduced thickness. They are then coiled and can either be sold to a customer or undergo a cold-rolling process. During the cold-rolling process, the coiled bands are unrolled and undergo a chemical treatment that helps improve their finish.
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