Anneal steel pipe

Cold rolled black annealed steel pipe is a type of steel pipe that has undergone a cold rolling process followed by annealing. The cold rolling process involves passing the steel through a series of rollers at room temperature to reduce its thickness and improve its surface finish. This can result in a smoother, more uniform surface and tighter dimensional tolerances compared to hot rolled steel.

After cold rolling, the steel pipe is then subjected to an annealing process, which involves heating the material to a specific temperature and then allowing it to cool slowly. This annealing step helps to relieve internal stresses, refine the microstructure, and improve the ductility and machinability of the steel.

The resulting cold rolled black annealed steel pipe is often used in applications where a smooth surface finish and precise dimensions are required, such as in furniture, automotive components, and certain structural applications. The annealing process can also help to achieve specific mechanical properties and enhance the formability of the steel.