Special Characteristics
Excellent corrosion resistance and mechanical strength and is the most suitable material for bolts,screws and other fasteners and has a marked work hardening characteristics.
Supply Conditions
All topone wires are coated to ensure smooth heading operations Condition. Cold drawn and Annealed, Cold drawn, Annealed and skin pass or as per customer requirement with very fine tolerance.
| Annealed Finish |
Light Drawn |
| Type |
Grade |
Tensile Strength N/mm2 (Kgf/mm2) |
Elongation (%) |
Reduction of area rate (%) |
Tensile Strength N/mm2 (Kgf/mm2) |
Elongation (%) |
Reduction of area rate (%) |
| Austenite |
AISI 304/316 |
490-740 (60-75) |
40 over |
70 over |
650-800 (66-81) |
25 |
65 |
| |
AISI 302HQ |
440-90 (45-60) |
40 over |
70 over |
460-640 (47-65) |
25 |
65 |
| Ferrite |
AISI 430 |
40-55 |
20 over |
65 over |
460-640 (47-65) |
10 |
60 |
What is stainless steel cold heading wire?
Stainless steel wire is often used for the manufacture of screws, rivets, bolts and nails the wire is used cold in order to form the required shape. Cold heading is basically a way of forming wire into a given shape without the need for heat. The process involves striking blows to a length of wire inserted in a die.
The force of the blow or blows causes the metal to flow into a restricted die cavity. The head or upset portion of the part is generally larger in diameter than the original blank of wire and shorter in length. The processes can be more complicated to achieve the correct type of head or have additional shaping processes for example for a hexagon bolt head.
For stainless steel cold heading the most popular grades are in the 300 400 series as they cold head much like carbon and low alloy steels. Type 430 stainless is the easiest to head, The 300 series provides more challenges than the 400 series since alloys in the 300 group have a higher work hardening rate.
Stainless steels in the 300 series require more energy to head than those in the 400 series Grades 302 HQ and 304 Cu which are similar to standard grade 304 with the addition of copper and therefore are the easiest to head, 303 stainless steel is also used for its machining properties.
There are now many alternatives that incorporate a mixture of the key components of machinability, formability and corrosion resistance required for the perfect cold heading wire to meet the customer applications.
Toponew Stainless Steel Wire for Cold Heading is made by special heat treatment, copper-bearing austenitic steel302CHQ, 304HQ, normal 304 and 430 are also used for cold heading fasteners.
About Us
Continuous improvement, seeking higher quality level. Our highly dedicated sales staff has never shied away from going that extra mile to meet and exceed the customer’s expectations. We treat our customers with the same loyalty and devotion, no matter the size of their business or industry.
We have a clean and tidy, wide workshop and a production and development team with rich experience, providing strong support for your r&d and production needs!All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world. If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
