Does cold rolled steel rust?

It will, although it is a type of steel plate, it is not rust-proof. This steel plate has a very precise thickness and a smooth surface, and possesses many good mechanical properties, especially when it comes to machining. However, before processing, it needs to be annealed, pickled and other procedures. Life in many places need to use to steel, it has many kinds, cold car steel plate is one of them.

The difference between cold rolled steel and hot rolled steel

1 Appearance and surface quality

By the dry cold plate is through the cold car after the funeral of the executive plate, and since the cold car will also carry out some surface finishing, so the surface quality of the cold plate is better, the dry coating quality requirements of higher products, such as subsequent painting, usually choose cold plate. Uncut plate usually has a layer of oxide, black in colour, or a layer of iron tetraoxide on the surface. In layman's terms, it is like a blessed colour, and will usually bull rust if stored in a poor environment.

2. Properties

Under normal circumstances, the mechanical properties of the executive plate as well as the cold plate are considered to be the same in the lower course, although the cold plate has a certain degree of hardening in the cold car discussion process, but the elastic limit of the cold plate is usually slightly higher depending on the degree of annealing of the cold plate, and its surface hardness is also higher. However, the strength of annealed cold plates is higher than that of hot plates.