Products Description
Looking for trusted galvanized steel plate manufacturers in China? You've come to the right place. As a direct factory with 20 years of structural steel experience, GNEE Steel supplies EN 10346 compliant sheets at factory prices. Choosing and using S350GD+Z120 galvanized steel plate correctly is essential to ensure optimal performance and cost-effectiveness in your projects.
Packaging and transportation
Selecting the right galvanized steel plate involves considering various factors including material specifications, application requirements, environmental conditions, and processing needs. Proper handling and installation are also crucial to maintain the material's performance.
Key Selection Criteria for S350GD+Z120 Galvanized Steel Plate
When selecting S350GD+Z120 galvanized steel plates, consider the following key criteria to ensure they meet your project requirements.
| Selection Criterion | What to Consider | Acceptable Range for S350GD+Z120 | Inspection Method |
|---|---|---|---|
| Material Certification | EN 10346 compliance, mill test certificate | Must meet EN 10346 standard | Check certification documents |
| Thickness Tolerance | Uniform thickness across the sheet | ±0.05mm for thickness <2mm, ±0.08mm for thickness ≥2mm | Use micrometer at multiple points |
| Surface Quality | Smooth surface, no visible defects | No peeling, blisters, rust, or excessive zinc spangles | Visual inspection under good lighting |
| Zinc Coating Adhesion | Coating should not peel during bending | Passes 180° bending test without coating peeling | Bending test according to EN 10346 |
| Dimensional Accuracy | Correct width and length as ordered | ±2mm for length and width | Use measuring tape or ruler |
Proper Handling and Storage of S350GD+Z120 Galvanized Steel Plate
Improper handling and storage can damage the zinc coating and reduce the material's service life.
| Handling/Storage Aspect | Correct Practice | Common Mistakes to Avoid | Recommended Tools/Equipment |
|---|---|---|---|
| Lifting and Transport | Use wide-faced slings or vacuum lifters | Using sharp hooks or cables that can scratch the coating | Wide slings, vacuum lifters, forklift with soft pads |
| Stacking | Stack on level, dry surface with wooden spacers between layers | Stacking on uneven or wet surfaces, no spacers between sheets | Wooden spacers, level pallets, waterproof covers |
| Storage Environment | Dry, well-ventilated area, protected from rain and snow | Storing outdoors without protection, in humid or corrosive environments | Indoor warehouse, waterproof tarpaulins if outdoor storage is necessary |
| Separation from Other Materials | Store separately from uncoated steel or copper materials | Storing with copper or uncoated steel that can cause galvanic corrosion | Separate storage areas or partitions |
| Inventory Rotation | First-in, first-out (FIFO) principle | Using newer stock first, leaving older stock to potentially deteriorate | Clear labeling with receiving dates |
Welding Guidelines for S350GD+Z120 Galvanized Steel Plate
Welding galvanized steel requires specific techniques to ensure strong welds and minimize zinc vapor exposure.
| Welding Aspect | Recommended Practice | Parameters for S350GD+Z120 | Safety Precautions |
|---|---|---|---|
| Welding Method | MIG/MAG welding (preferred), TIG welding | MIG: ER70S-6 wire, 80%Ar+20%CO2 shielding gas | Use proper ventilation, wear respirator rated for zinc fumes |
| Pre-Welding Preparation | Clean weld area, remove zinc coating 20-30mm from weld line | Grind or file away zinc coating to expose base metal | Angle grinder with flap disc, wire brush |
| Welding Current/Voltage | Slightly higher than for uncoated steel of same thickness | 180-220A, 22-26V for 2-3mm thickness | Adjust based on actual welding conditions |
| Post-Welding Treatment | Clean weld area, apply zinc-rich paint to exposed areas | Remove welding spatter, touch up with zinc-rich primer | Wire brush, zinc-rich paint, paintbrush |
| Weld Inspection | Check for weld defects and coating damage | No cracks, porosity, or incomplete fusion | Visual inspection, dye penetrant test if required |
Proper selection, handling, and use of S350GD+Z120 galvanized steel plate are critical to maximizing its performance and service life. By following the guidelines provided, you can ensure your projects benefit from the full advantages of this high-quality material. If you need additional technical guidance on using S350GD+Z120 galvanized steel plates, contact GNEE Steel's technical support team for professional assistance!
- Zinc Thickness
| Zinc Coating Grade | Zinc Coating (g/m²) | Corrosion Resistance | Typical Applications | Remarks |
| Z30 | 30 | Very low | Indoor parts, home appliance inner panels, ventilation ducts | Not suitable for outdoor use |
| Z60 | 60 |
Low |
Indoor structures, temporary facilities | Low cost |
| Z80 | 80 | Medium | Light steel structures, base metal for PPGI | Good cost performance |
| Z100 | 100 | Medium | PPGI, fencing, general construction
|
Common export grade |
| Z120 | 120 | Medium-High |
|
Longer service life |
| Z140 | 140 | Medium-High | Industrial buildings, agricultural facilities | Suitable for outdoor use |
| Z180 | 180 | High | Long-term outdoor structures, equipment housings
|
Recommended for outdoor use |
| Z200 | 200 | Very high | Humid environments, heavy structures
|
Higher cost |
| Z275 | 275 | Excellent
|
Coastal areas, solar mounting systems, high-corrosion environments | High standard |
Request mechanical properties report + SGS test certificate
