>Wire diameter: 1.8mm-30mm
>Coil weight: 100-2,000kg
>Technical: Pickling&coating etc.

Cold heading quality wire(CHQ Wire)involves particular raw materials and chemistry to withstand swedging and heading and forming with great quality.  It is suitable for fastener and cold heading applications such as bolts, nuts, screws, rivets, nails, etc.SMC keeps strict control of the surface and chemical composition of the wire to offer the best product.

Specifications of Cold Heading Quality Wire(CHQ Wire) for Nut :

1. Brand: SMC
2. Wire diameter: 1.8mm~30mm
3. Coil weight: 100~2,000kg
4. Grade: SUJ2, SWCH6A-10A, SWCH12A-45K, SCM415-420, SCM435-440, SCr415-440, SWCH6A-22A, SWCH6A, SNCM240, SCr415-420, SCr435-440, SCM415-420, SCM435-440, SCr415-420, SCM415-420, etc.
5. Technic Process: Pickling & coating, Intermediate drawing, Spheroidized annealing, Skin pass
6. Alloy or not: Alloy
7. Diameter tolerance: +/-0.04mm for below 10mm, and above 10mm +/-0.55mm.
8. Other available material:
• Low and medium carbon steel
• Alloy steel
• Stainless steel
• Non ferrous materials like copper and brass etc.
9. Executive standard: ASTM A545
10. Customized shapes and sizes are accepted.

Chemical composition of Cold Heading Quality Wire(CHQ Wire) for Nut :

Parameter of Cold Heading Quality Wire(CHQ Wire) for Nut :

Process of Cold Heading Quality Wire(CHQ Wire) for Nut :

Pickling & coating
The hot-rolled coil or wire rod passes through the pickling line, where hydrochloric acid solution is used to remove surface scale for clean surface finish before further processing and to form a lubrication film on the surface to reduce the coefficient of friction in the drawing and cold working process. The Gantry Crane moves between the tank during the process.

Intermediate drawing
This process which produces half-finished products for the following stage improves the spherodized ratio during spheroidized annealing. The wire drawing machine composed of Supply Stand ,Drawing Drum, Take up stages produces half-finished coil products.

Spheroidized annealing
This annealing process with the purpose of obtaining spheroidized carbides facilitates the cold works. Once inserted in the heat treatment furnace, the process takes place in the order of controlled heating up to a given time, temperature and furnace atmosphere, along with maintenance at such temperature during a certain period and cooling controlled in accordance with the purpose intended. This process is controlled by automatic heat cycle.

Pickling & coating
The hot-rolled wire rod passes through the pickling line, where hydrochloric acid solution is used to remove surface scale for clean surface finish before further processing and to form a lubrication film on the surface to reduce the coefficient of friction in the drawing and cold working process.

Skin pass
The wire drawing machine produces half-finished coils where products meet the customers' needs in terms of the size and mechanical properties of products.

Packing of Cold Heading Quality Wire(CHQ Wire) for Nut :

SMC Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.
1)SMC Standard
2)Customization

Service

To meet the entirety of our customers business needs, SMC offers its services as a “One-Stop Shop” for business services including Purchasing, Value-Added Manufacturing, Packaging/Labeling, and Delivery. SMC prides itself on achieving superior results and satisfying customer needs. In this, we earnestly strive to fulfill our role as trustworthy and reliable supplier of business services throughout the entire world.
Our Value-Added Manufacturing Services not only save our customer time from having to out-source, but also spare them the cost of dealing with several disparate shops and deadlines.

Features of:

High strength and hardness
High production efficiency
Low cost and strong fatigue resistance
Grain flow which improves the finished part grain structure

Applications of Cold Heading Quality Wire(CHQ Wire) for Nut :                                    

• Automative:                                                                                                  
- Engine: spark plug shell,cylinder head bolt, piston rod, etc.
- Steering system (ball joint stud, tie rod pin, pinion, etc.)
- Wheel: hub bolt, nut, etc.
• Airplanes: High-tension bolts for wings
• Bearing : roller bearing,ball bearing,etc.
• Construction: fastener bolt, etc.
• Electronic parts: Material for Switch Relay
• Industrial machines & Electronic parts : fastener bolt, nut, screw, etc.

For more details, you can visit our official website: or you can scan our QR code here.