Key points for selecting materials for welded mesh

The selection of materials for welded mesh is a crucial step in determining its performance, lifespan, and application effectiveness. It requires comprehensive consideration from five aspects: material type, wire diameter specifications, surface treatment, mechanical properties, and environmental standards. The following are specific selection points:

1、 Material type: Select according to the application scenario

LOW CARBON STEEL WIRE

Features: Low carbon content (≤ 0.25%), excellent welding performance, good plasticity and toughness, low cost.

Applicable scenarios: ordinary building exterior wall insulation, interior wall crack prevention, fences and other scenarios that do not require high strength.

Example: Q195 and Q235 low-carbon steel wires are widely used in residential exterior wall insulation systems.

Stainless steel wire

Features: Corrosion resistance (based on actual reports), strong performance (especially 304 and 316 stainless steel), with a lifespan of over 20 years, but high cost.

Applicable scenarios: Corrosive environments such as coastal areas and chemical industries, or decorative projects with high aesthetic requirements.

Example: 304 stainless steel welded mesh is used for marine platform protection, and 316 is used for fencing in food processing plants.

Galvanized iron wire

Features: Through hot-dip galvanizing or electroplating treatment, the anti-corrosion performance (based on actual reports) is improved, the hot-dip galvanized layer is thicker (≥ 45 μ m), and the service life is over 10 years.

Applicable scenarios: Wet environments (such as basements, bathrooms) or outdoor projects that require long-term exposure.

Example: Hot dip galvanized welded mesh is used as the insulation backing layer for steel structure roofs.

Aluminum alloy wire

Features: Low density, good strength, corrosion resistance (based on actual reports) better than ordinary steel, but higher cost.

Applicable scenarios: scenarios with high demand for lightweight, such as aviation and excellent building decoration.

2、 Wire diameter specification: matching mechanical performance requirements

Principle of wire diameter selection

The thicker the wire diameter, the higher the mesh strength, but the cost increases. Choose according to the engineering stress requirements:

Light engineering (such as interior wall crack prevention): wire diameter 0.5mm-0.8mm.

Medium sized projects (such as exterior wall insulation): wire diameter 0.8mm-1.2mm.

Heavy engineering (such as fence and bridge protection): wire diameter ≥ 1.2mm.

Deviation control

The deviation of wire diameter should meet the standard (such as ± 0.05mm) to avoid insufficient welding strength or mesh deformation caused by uneven wire diameter.

3、 Surface treatment: Enhance performance stability and functionality

CGL

Process: Immerse the mesh into molten zinc solution (450-480 ℃) to form a zinc iron alloy layer.

Advantages: Good anti-corrosion performance (based on actual reports), suitable for humid, acidic and alkaline environments.

Standard: Zinc layer thickness ≥ 45 μ m (GB/T 13912-2002).

Electroplated galvanizing

Process: Zinc layer is deposited by electrolysis, with a thickness of about 5-15 μ m.

Advantages: Low cost, smooth surface, but weaker anti-corrosion performance (based on actual reports) compared to hot-dip galvanizing.

Applicable scenarios: indoor dry environments or short-term use projects.

PVC coated plastic

Process: Apply a PVC plastic layer on the surface of the mesh, with a thickness of 0.3-0.5mm.

Advantages: It combines anti-corrosion (based on actual reports) and decorative functions, with a variety of colors (such as dark green and grass blue).

Applicable scenarios: garden fences, landscape engineering.

Spray treatment

Process: Powder coating is attached to the surface of the mesh through electrostatic spraying, and then cured at high temperature.

Advantages: Strong weather resistance, good surface hardness, suitable for long-term outdoor exposure scenarios.

4、 Mechanical performance: Confirm the structural safety

weld strength

The solder joints should be full and free of virtual soldering, and the tensile strength of a single solder joint should be ≥ 100N (taking 0.8mm wire diameter as an example).

Testing method: Conduct destructive testing on solder joints using a tensile testing machine.

tensile strength

The overall tensile strength of the mesh must meet the design requirements (such as ≥ 400MPa).

Testing method: Cut the sample strip for tensile testing and record the fracture strength.

Mesh uniformity

The deviation of mesh size should be controlled within ± 1mm to avoid installation difficulties or uneven stress caused by uneven mesh size.