Cr Fastner Coil

The term "CR Fastener Coil" most likely refers to Cold Rolled (CR) steel coil that is specifically used in the manufacturing of fasteners or related components.

Here is a general description, focusing on the "Cold Rolled Coil" aspect, as this is the raw material:

1. What a CR Coil Is (Cold Rolled Coil)

• Manufacturing Process: CR (Cold Rolled) coils are produced from hot-rolled steel that is further processed at or near room temperature. This involves passing the steel through a series of high-precision rollers (cold rolling process).

• Resulting Properties (compared to hot-rolled steel):

  • Superior Surface Finish: They have a smooth, clean surface, ideal for applications requiring a high-quality finish, like painting or plating (common for many fasteners).

  • Tighter Dimensional Accuracy: Cold rolling provides excellent control over thickness and flatness, resulting in very precise dimensions.

  • Increased Strength: The process increases the steels tensile and yield strength, making the material stronger and harder.

  • Improved Formability/Ductility (if annealed): Depending on the final processing (such as annealing, which results in CRCA - Cold Rolled Closed Annealed), the material can also have excellent ductility and formability, which is essential for stamping, bending, or drawing into complex shapes like certain fasteners.