Cold Rolled Hard Steel Wire

Company profile

 

TIANJIN BO YI DA IMPORT AND EXPORT CO.,LTD is a modern production and exporting enterprise funded in 2014 with rich-full exporting experiences.

Our Product: ROOFING, BLACK PIPE, GALVANIZED PIPE, HOLLOW SECTION, GALVANIZED WIRE, STEEL COIL, etc have been exported to Africa: West Africa, East Africa, South east Asia: Philippines, Vietnam, Singapore, South America etc. Products are widely used in building and constructions.

We firmly believe in "Quality first, Service first" and to add value to our corporation. Looking forward win win business with global customers!

 

why choose our products

 

Cold rolled hard steel wire is steel that has not been fully finished in a cold reduction mill. The steel is un-annealed cold-rolled, meaning it has no finish treatment. Cold-rolled steel is manufactured in cold reduction mills, where the material is cooled to near room temperature before annealing and/or tempers rolling. The processing begins with rolling a hot rolled slab to hot rolled coil, followed by a pickle bath to remove the scale and imperfections. Cold-rolled steel is typically harder and stronger than standard hot rolled steels. It also has a better surface finish, improved tolerances, and a wide range of straightness. Cold-rolled steel has sharp edges, a very smooth surface texture, and an oily or greasy feel to it.

Cold rolled hard steel wire the chemical composition of the wire is 0.01C-0.3Si-0.2Mn. The wire is heated to 500 °C, rolled by an oval–square roll and coiled. Then, the rolled wire is again heated and rolled by a set of different oval–square rolls and coiled. Finally, the same process was repeated with the other oval–square roll set to obtain a wire 3 mm in diameter. Though the apparent reduction in cross-section is only 75% (strain = 1.35), a strain that is larger than 4 is introduced in the material. The appearance of the rolled wire is shown in Figure. Several hundred meters of wire were obtained.

Cold rolled hard steel wire is a high-strength, rigid wire used in mechanical and industrial applications where durability matters more than flexibility. For corrosion resistance, galvanized or stainless steel wire is preferred.

This causes an increase in its strength and often improves corrosion resistance. Along with improving its surface finish, another advantage of cold rolling is better dimensional accuracy. A cold rolled stainless steel coil can be precision manufactured, allowing the metal to be produced to extremely tight tolerances

● Surface finish: Cold rolled steel wire has a smooth, shiny surface that is free of rust and scale.

● Work hardening: Cold rolled steel wire is work hardened during the rolling process, which makes it easily machined.

● Ductility: Cold rolled steel wire is an extremely ductile material, making it ideal for applications where precision is necessary.

Common Wire Gauges (Sizes)

 

 

 

✔High strength & durability – withstands heavy loads.
✔ Good dimensional accuracy – precise thickness due to cold drawing.
✔ Retains shape – ideal for springs, fasteners, and mechanical parts.

Store in dry conditions to prevent rust (oiled versions resist corrosion better).

Avoid excessive bending to prevent fractures.

For outdoor use, choose galvanized or PVC-coated variants.

 

 

after sales service

√Provide product usage guidelines and installation suggestions.
√A professional team offers technical support to customers.
√In case of quality issues with the product, offer quick replacement or return services.
√Provide global logistics tracking to ensure timely delivery of orders.

Automotive & Machinery: Springs, clutch wires, cables.

Construction: Nails, staples, wire mesh.

Industrial: Fasteners, barbed wire, wire ropes.

Consumer Goods: Paper clips, hangers, welding rods.

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