Spheroidized annealed CHQ wire for precision fasteners

Spheroidizing annealing plays a key role in the production of cold heading quality (CHQ) wire, ensuring consistent performance and formability for precision fastener applications.

This heat treatment transforms pearlitic carbides into a globular structure, resulting in improved ductility, stable tensile properties, and excellent machinability.

The process is typically carried out in nitrogen-protected furnaces with controlled methanol-based atmospheres. This setup ensures a high spheroidization rate, consistent grain size, and superior resistance to oxidation and decarburization. These characteristics are essential for maintaining dimensional stability and surface quality during subsequent cold forming operations.

Wuxi AoTian Steel Wire Products Co., Ltd. manufactures the following steel grades:

• SAE1006, SAE1008, SAE1010, SAE1015, C1018, C1022
• EN/DIN equivalents: C10C, C17C, C20C
• JIS grades: SWRCH22A, SWCH6A

Diameter range: 0.5 mm to 42.0 mm
Inner coil diameters: 350 mm to 1500 mm

Typical hardness after spheroidized annealing: 110–150 HV (depending on grade and customer requirements)

Key benefits:

• High spheroidization rate for reliable cold forming
• Stable ductility and tensile properties
• Uniform microstructure, ideal for precision fasteners
• Reduced tool wear and risk of defects

Certified under ISO 9001 and IATF 16949, this wire ensures quality and traceability for manufacturers of precision fasteners across automotive and industrial sectors.

For additional specifications or technical support, please contact Wuxi AoTian Steel Wire Products directly.