Import Black Annealed Iron Wire — Buy in Bulk from Supplier in China

Black annealed iron wire from Hebei Huaruida Metal Wire Products Co., Ltd is a low-carbon steel wire that has undergone an annealing heat treatment to achieve a soft, ductile finish with a dark oxide surface. The wire is drawn to consistent gauge and then heated in a controlled atmosphere to relieve internal stresses, resulting in a product that bends easily without cracking or spring-back. Typical wire diameters for this grade range from 0.5 mm to 6.0 mm, with BWG (Birmingham Wire Gauge) and SWG (Standard Wire Gauge) being the common sizing systems used in international trade. The black oxide coating provides mild corrosion resistance during storage and handling, though additional protection is recommended for outdoor exposure.

This wire is manufactured from Q195 or Q235 low-carbon steel billet, grades standard for binding and tying applications where tensile strength is secondary to formability. The annealing process reduces hardness from approximately 120-180 HV (as-drawn) to 80-120 HV, yielding a product with tensile strength typically between 350 and 550 N/mm² depending on diameter and exact process parameters. Elongation at break generally exceeds 15 percent, which is critical for applications requiring twisting and knotting without fracture. The black colouration comes from mill scale formed during annealing, not from a separate coating, distinguishing it from galvanised or PVC-coated alternatives. Standard coil weights range from 0.5 kg to 500 kg, with smaller coils (1-25 kg) common for construction hand tools and larger coils for mechanical baling equipment.

Primary buyers include construction contractors for rebar tying, agricultural operations for vine and plant support, packaging firms for bailing cardboard and textiles, and manufacturers of wire mesh and fencing. The wire serves as a consumable in concrete reinforcement workflows, where workers use manual or automatic tying guns to secure steel bar intersections. For import purposes, this product typically ships in 20-foot or 40-foot containers from Tianjin Port, with coils wrapped in hessian or plastic film and secured on wooden pallets. Buyers should confirm whether the supplier provides mill test certificates or third-party inspection reports, as these are not indicated in the available listing data.

Hebei Huaruida Metal Wire Products Co., Ltd is located in Yantuan Industrial Zone, Anping County, Hengshui, Hebei Province, China, an area with established wire mesh and metal product manufacturing infrastructure. The supplier is classified at the imported tier with a harbor trust designation, which indicates a baseline verification status on the platform. Notably, the response rate is recorded at 0.00 percent with an average response time of zero hours, suggesting that inquiry responsiveness data is either unavailable or not yet populated for this account. Buyers should therefore anticipate potential delays in communication and plan sourcing timelines accordingly.

The listing does not specify factory size, annual output, export history, or quality management certifications such as ISO 9001. No client references, sample policy, or trade show participation is mentioned. The company profile available does not state years in operation, number of employees, or revenue figures. Buyers are advised to request a company brochure, factory audit report, or video verification before committing to large orders. The supplier's location in Anping is relevant because this county is China's principal cluster for wire mesh and wire product manufacturing, which implies access to raw material suppliers and skilled labour, though this does not substitute for individual supplier due diligence.