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JUNHE carbon steel welded mesh for security fencing is manufactured from low carbon steel wires (Q195, Q235 grades) with precision resistance welding at each intersection. The product is available with galvanized or PVC coated surface treatments, and is designed for perimeter protection, boundary demarcation, and safety barrier applications across industrial, commercial, and infrastructure sectors. Wire diameters range from 0.5mm to 6mm, with mesh openings from 10×10mm to 200×200mm, supporting customized specifications to meet project-specific requirements.
Parameter | Value | Standard Reference |
|---|---|---|
Base Material | Low carbon steel (Q195, Q235) | GB/T 700-2006 |
Wire Diameter Range | 0.5mm - 6mm | GB/T 343-1994 |
Wire Diameter Tolerance | ±0.02mm | GB/T 343-1994 |
Tensile Strength of Welded Joints | 80 N/mm² | GB/T 2657-1981 |
Tensile Strength of Steel Wire | 350-550 N/mm² | GB/T 343-1994 |
Specification | Range | Notes |
|---|---|---|
Mesh Opening | 10×10mm to 200×200mm | Custom sizes available |
Mesh Opening Tolerance | ±0.5mm | For openings ≤50mm |
Standard Width | 0.5m - 3m | Roll or panel form |
Standard Length | 1m - 50m | Custom lengths accepted |
Panel Form | 1m×2m, 1.2m×2.4m, 1.5m×3m | Common stock sizes |
Treatment Type | Coating Thickness | Salt Spray Resistance | Applicable Environment |
|---|---|---|---|
Electro-galvanized | 8-15 g/m² | ≥48 hours (ASTM B117) | Indoor, dry environments |
Hot-dip galvanized | 30-60 g/m² | ≥500 hours (ASTM B117) | Outdoor, moderate corrosion |
PVC Coated | 0.4-0.8mm thickness | ≥1000 hours (ASTM B117) | Outdoor, high humidity, coastal |
The production process begins with incoming raw material inspection. Each coil of steel wire undergoes diameter verification using a micrometer, tensile strength testing, and chemical composition analysis to confirm compliance with Q195 or Q235 grade specifications. Only wire coils that pass all inspection criteria proceed to the production line.
The mesh is manufactured using automated resistance welding machines. Horizontal and vertical wires are fed through precision guides, and copper alloy electrodes deliver controlled current and pressure at each intersection point. The welding parameters—current intensity, welding time, and electrode pressure—are calibrated based on wire diameter to ensure consistent joint strength of 80 N/mm² across the entire mesh surface. Each production batch includes welding strength spot testing at 5 percent of intersections, with results recorded in batch inspection reports.
For galvanized products, the mesh passes through a degreasing bath, acid pickling tank, flux coating, and finally the molten zinc bath. The immersion time and zinc bath temperature (440-460°C for hot-dip galvanizing) are controlled to achieve the specified coating weight. For PVC coated mesh, the galvanized base mesh is preheated and then passed through a fluidized bed powder coating chamber, followed by a curing oven at 180-200°C to ensure uniform coating adhesion.
Finished mesh panels and rolls undergo multi-point inspection: mesh opening accuracy is verified at 10 points per panel, flatness is measured against a 2mm tolerance per square meter, and surface coating integrity is checked via visual inspection and adhesion testing. Each shipment is accompanied by a quality inspection report detailing batch number, specifications, and test results.
Electro-galvanized mesh has a thinner zinc coating (8-15 g/m²) applied via electrolytic deposition, suitable for indoor or dry environment applications. Hot-dip galvanized mesh receives a thicker zinc coating (30-60 g/m²) by immersion in molten zinc, providing significantly longer corrosion resistance for outdoor exposure. Hot-dip galvanized products show 500+ hours of resistance in ASTM B117 salt spray testing, compared to 48+ hours for electro-galvanized.
Welded joint strength is tested according to GB/T 2657-1981 standard, with a minimum requirement of 80 N/mm² tensile strength at each intersection. Production quality control performs destructive pull tests on sample pieces from each production batch, and the results are documented in batch quality records. Third-party inspection reports from organizations such as SGS or BV can be arranged upon request for an additional fee.
The minimum order quantity for standard size mesh rolls or panels is 500 square meters. For custom mesh openings, non-standard dimensions, or custom PVC colors, the minimum order quantity is 1000 square meters. Smaller trial orders may be accommodated depending on current production scheduling and material availability, and are evaluated on a case-by-case basis.
Sample pieces of standard specification products can be provided at no charge, with the purchaser covering courier shipping costs. Custom specification samples require a sample production fee of 30-100 USD depending on complexity, which can be credited toward subsequent bulk orders. Sample production typically takes 3-5 working days for standard items and 7-10 working days for custom items.
The appropriate specification depends on the security level required and the installation environment. For general perimeter fencing, 50×50mm or 50×100mm mesh openings with 3-4mm wire diameter are common. For high-security applications, 25×25mm openings with 4-6mm wire provide enhanced cut and climb resistance. For coastal or high-humidity locations, hot-dip galvanized or PVC coated finishes are recommended. Project-specific recommendations can be provided based on application details submitted by the purchaser.
