500G Balck Annealed Wire

Firmstone (Tianjin) International Limited is one of the leading manufacturers and suppliers of 500g balck annealed wire in China. We are committed to providing high quality customized products for global clients. If you're going to buy durable 500g balck annealed wire made in China, welcome to get pricelist from our factory.

500G Black Annealed Wire – medium-weight soft black iron wire, standard 500g coil, upgraded for medium-volume binding and fixing. High-temperature sealed annealing eliminates internal stress for excellent flexibility and ductile temper without rigidity or rebound. Natural matte black oxidized surface from annealing, no coating or polishing, smooth and burr-free for easy manual bending, twisting and knotting. Adapts to continuous manual and semi-mechanical binding. Balanced coil weight and stable strength overcome 200G capacity limits, ideal cost-effective choice for medium-volume daily and industrial binding.

The product maintains a versatile diameter range from 0.63mm to 4.5mm, covering all common specifications for medium-duty binding and temporary fixing scenarios. Each finished coil follows a strict standard net weight of 500g, realizing larger single-coil capacity than small-size annealed wires to reduce frequent coil replacement during continuous operation. The wire features pure soft ductile temper with no hard bends, no wire breakage and no rebound deformation during repeated twisting and bending. Adopting standardized carton packaging, the product is effectively protected from dust and minor extrusion during transportation and storage, ensuring complete coil shape and stable performance for bulk engineering and daily use.

This black annealed wire adopts premium Q195 low carbon steel wire as the core raw material, which possesses fine and uniform steel texture, low impurity content and superior inherent ductility. After strict high-temperature sealed annealing treatment, the original rigid and tough mechanical properties of drawn steel wire are completely optimized, forming a soft and flexible temper suitable for frequent bending and tying. The wire surface generates a dense natural black oxide film through high-temperature oxidation, replacing traditional zinc coating protection. This unique material processing retains excellent manual operability and provides basic anti-oxidation performance for short-term use, fully matching the positioning of economical medium-load binding wire for construction, agriculture and factory use.

Designed for medium-volume binding demands, 500G Black Annealed Wire is widely applied in construction, agricultural and industrial temporary fixing scenarios. It is mainly used for construction brick binding and auxiliary building material fixing, waste paper and scrap metal centralized bundling and sorting, agricultural crop and seedling tying support, as well as factory spare parts and semi-finished product temporary positioning and fixing. With moderate capacity and excellent flexibility, it is an ideal economical binding material for medium-intensity daily and engineering operations.

The product adopts mature and standardized production procedures to ensure stable soft performance and consistent quality: firstly, conduct multi-pass precision steel wire drawing to process raw steel rods into standard finished wire sizes with uniform diameter; secondly, put the drawn wires into a high-temperature sealed annealing furnace for integral softening treatment to eliminate internal stress; thirdly, form a uniform and compact natural black oxide film on the wire surface through high-temperature oxidation; fourthly, complete automatic mechanical coiling to shape standard 500g uniform rolls; finally, conduct quantity sorting, quality inspection and standardized carton packaging for bulk storage and transportation.

This wire has no galvanized anti-corrosion layer, so it is restricted to indoor and short-term outdoor use and should not be exposed to long-term rainy, humid or corrosive environments to avoid surface rust and performance degradation. It is only applicable for medium-volume light binding, avoiding excessive heavy tension or violent pulling to prevent wire fracture. Store the packaged wires in dry, ventilated and clean warehouses to slow down natural oxidation. Prevent sharp friction and collision during handling to avoid damage to the surface oxide film.

Compared with 200g small-coil black annealed wire, this 500g version features larger single-coil capacity, fewer coil replacements and higher working efficiency, more suitable for medium-volume continuous binding work. Different from galvanized wires with anti-rust coating, it has lower cost and softer texture but weaker outdoor durability. Unlike high-tensile hard steel wires for heavy-load engineering, it prioritizes flexible manual operability rather than structural strength, presenting outstanding cost performance and practicality for medium-duty conventional binding scenarios.

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