SWCH45K is a medium carbon steel wire for cold heading. In the field of steel materials, SWCH45K wire stands out for its excellent performance and wide applicability. With its advantages of low decarburization layer and few surface defects, it ensures a low cracking rate during the parts manufacturing process and makes the cold heading process smoother. At the same time, its good heat treatment performance and hardenability further improve the quality and performance of the final product.

Commonly used to produce 8.8-10.9 grade high-strength standard parts.

Chemical element content (%)

Specification：2.00~42.00mm

Production process:

Process D: cold drawing of wire rod into steel wire;
Process DA: annealed cold drawn steel wire and annealed wire rod into cold drawn steel wire.

Deoxidation method: The character after the number in the grade indicates the deoxidation method of the steel, and "K" stands for killed steel.

Application: Used to make bolts, nuts, and screws; widely used in parts manufacturing in industries such as bicycles, automobiles, mechanical equipment, electrical appliances, aviation equipment, cameras, and construction.

Mechanical properties:

-After spheroidizing annealing (DA) before cold working of the wire, the tensile strength must be ≤710MPa, the cross-sectional shrinkage rate must be ≥55%, and the hardness HRB≤97.

It should be noted that for steel wires with a diameter of 20mm or more, the minimum cross-sectional shrinkage should be 5 less than the specified value; for steel wires with a diameter of 3mm or less, the cross-sectional shrinkage is usually not specified.