Do you know the difference between hot rolled and cold rolled steel?

Let’s start with hot rolled steel first.

Hot rolling is a rolling mill process that involves rolling steel at high temperatures in excess of 1700 degrees Fahrenheit.This makes the metal easier to shape and form the metal. The steel is then cooled,which causes it to Tshrink.This means there is less control over the size and shape of the finished product.This is part of the reason why hot rolled steel is usually cheaper than cold rolled steel.

Hot rolled steel is used when precise shapes and tolerances are not required.The three ways to identify hot rolled steel are a scaly surface finish,rounded edges on bar stock, and non-oily surface.Some common uses for hot rolled steel are: building construction, piping, truck frames, doors and shelves, railroad tracks, streetcar parts, and more.

Let’s talk the cold rolled steel second.

Cold rolled steel is essentially hot rolled steel that has been further processed. Hot-rolled steel is heated and then cooled, and cold-rolled steel is heated, cooled at room temperature, and then annealed or temper-rolled.These additional processes allow for a wider range of finishes,and closer dimensional tolerances.The term cold rolled is mistakenly used on all products,but the name actually refers to the rolling of flat rolled plate and coil products.The terms “cold finished” or “cold drawn” are used to refer to bar products,which are usually formed into shape by cold drawing through a die.The three ways to identify cold rolled steel are an oily or greasy finish,a very smooth surface,and very sharp edges on bar stock.

Cold rolled steel are widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc.

All above,hope this helps you understand the difference between hot rolled and cold rolled steel.

Solucky Steel Limited located in the magic city of Shanghai, the warehouse is close to Baosteel. As a distributor of steel products in China, it is can cut to size which you want of metal,including hot rolled and cold rolled steel.