SWCH6A is a carbon steel wire for cold heading. It has good strength and can withstand certain tensile and compression requirements. It is suitable for cold heading processing. It has good plasticity and formability during cold deformation and is not prone to cracks and fractures. It can provide sufficient mechanical strength to meet the load-bearing requirements of the manufactured parts during use. The surface is relatively smooth, reducing defects and flaws during processing.

In practical applications, swch6a wire usually needs to be further processed and treated according to specific usage requirements, such as cold heading, cold extrusion, cutting, etc. At the same time, in order to ensure its performance and quality, it is also necessary to strictly control various process parameters in the production process.

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 characters after the number in the grade indicate the deoxidation method of the steel. The "a" in swch6a stands for aluminum killed steel.

Application：Used to manufacture various standard parts and components, such as bolts, nuts, screws, etc., and widely used in machinery manufacturing, automobile industry and other fields.

Mechanical properties:

-The wire is spheroidized annealed (da) before cold working, with a tensile strength of ≥290MPa, a cross-sectional shrinkage of ≥55%, and a hardness of HRB≤80;

-For wires with a diameter of not more than 3mm, the tensile strength after cold working (d) is ≥540MPa, and the cross-sectional shrinkage is not specified;

-For wires with a diameter greater than 3mm and not greater than 4mm, the tensile strength after cold working (d) is ≥440MPa, and the cross-sectional shrinkage is ≥45%;

-For wires with a diameter greater than 4mm and not greater than 5mm, the tensile strength after cold working (d) is ≥390MPa, and the cross-sectional shrinkage is ≥45%;

-For wires with a diameter greater than 5mm, the tensile strength after cold working (d) is ≥340MPa, the cross-sectional shrinkage is 6.45%, and the hardness is ≤85HRB.


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.