Stainless steel bars are formed through a process called hot rolling, which involves heating the steel to a high temperature and then rolling it into the desired shape. Here are the basic steps involved in the process:

1. Melting and casting: The first step in the production of stainless steel bars is to melt the raw materials, which typically include iron, nickel, chromium, and other alloys, in a furnace. The molten metal is then poured into molds to create ingots.

2. Preheating: The ingots are then preheated in a furnace to a temperature of around 1,200 degrees Celsius, which makes them easier to work with.

3. Rolling: The preheated ingots are passed through a series of rollers that gradually reduce their thickness and shape them into the desired size and shape. This process is called hot rolling because the metal is heated during the process to make it more malleable.

4. Cooling: After the bars have been shaped, they are cooled in a water bath or air-cooled to harden them and make them stronger. 5. Finishing: Finally, the bars are polished or otherwise finished to give them a smooth, shiny surface.

Stainless steel bars can also be formed through cold drawing, which involves pulling the metal through a die to create a specific shape. This process is used to create bars with more precise sizes and shapes and can be used to create smaller-diameter bars that are not easily produced through hot rolling.

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