Product Introduction
Galvanized steel coils are metal sheet coils made by uniformly coating a layer of zinc on the surface of carbon structural steel. Their core function is to utilize the sacrificial anode protection mechanism of the zinc layer to isolate the contact between the steel substrate and corrosive media such as air and water, thereby significantly enhancing the corrosion resistance of the steel and prolonging its service life.
| Product Name | Galvanized Steel Coil |
| Material | SGCC, DX51D+Z, DX52D+Z, DX53D+Z, DX54D+Z, S220GD+Z, A653 etc. |
| Grade | Q235, Q345, SS400, ST37-2, ST52, Q420, Q460, S235JR, S275J |
| Tolerance | ±1% |
| Oiled or Non-oiled | Non-oiled |
| Standard | JIS, G3302, ASTM, A653M, EN10327, DIN17162, EN10142, EN10147, EN10292 |
| Zinc coating | 40-600g/m2 , Can be customized |
| Technique | Hot Rolled Based |
| Surface treatment | Galvanized, PVC black and painted, transparent oil, antirust oil, can be customized. |
| Thickness | 0.1-10mm , can be customized |
| Width | 50cm-2.2m or as required |
| Length | Customized(1-30t/coil) |
| Application | Automotive Manufacturing, Bridges, Electronic Appliances, Shipbuilding, Automobiles, Roofing, Elevator, Construction |
Material and Composition
The base material of galvanized steel coils is mainly low-carbon carbon structural steel. In some scenarios, low-alloy high-strength steel is used. The core components and their functions are as follows:
|
Element |
Mn |
Si |
P |
S |
Zn |
| Content |
0.30% - 1.65% |
≤ 0.50% |
≤ 0.035% |
≤ 0.035% |
Purity ≥ 99.9% |
Mechanical Property
If your requirements are for ordinary load-bearing, simple processing, high cost performance, cost control, making fences, ordinary steel structures, simple brackets, etc., you can choose Q235 galvanized steel coils.
Meanwhile,your project requires high-strength load-bearing capacity, such as large steel structures, bridges, or mechanical components, you can choose Q345, which has higher strength, better toughness, and is suitable for more demanding engineering scenarios.
|
Performance Item |
Unit |
Q235 Galvanized Steel Coil |
Q345 Galvanized Steel Coil |
|
Yield Strength |
MPa |
≥235 |
≥345 |
|
Tensile Strength |
MPa |
375～460 |
470～630 |
|
Elongation |
% |
≥26 |
≥20 |
|
Impact Energy |
J |
≥27 |
≥34 |
Customized Service
We provide flexible and tailored customization services for Galvanized Sheet Coil to fully meet your specific needs.
• Size Customization
Customize thickness, width and length according to your actual use scenarios, with precise tolerance control.
• Material Customization
Provide Q235, Q345 and other materials to match your load-bearing and processing needs.
• The Surface Customization
the surface zinc flakes (Spangle) of big spangle, no spangle and small spangle galvanized steel coils can be customized.
Manufacturing Process
Based on your needs, our hot-dip galvanizing process has 4 core advantages, concise and reliable:
High-Quality Base Material
Uses qualified cold/hot-rolled steel coils, compatible with Q235/Q345, ensuring stable performance for various scenarios.
Rigorous Process & Durable Coating
Pre-treated (degreasing, derusting) and dipped in 450℃ molten zinc, forming a dense, non-peeling zinc layer with strong corrosion resistance.
Detailed Control & Cost-Saving
Air knife thickness control, passivation and oil coating enhance rust resistance, reducing later maintenance costs.
Strict Quality Inspection
Strictly inspected before packaging, avoiding zinc peeling and rust, ensuring qualified delivery and worry-free use.
Dimensional Range & Tolerances
Our product tolerance strictly complies with GB/T 708-2019 standard, with precise control that reflects our strong production strength and commitment to quality, bringing you more reliable use experience:
Hot-Rolled Base Thickness Tolerance
±0.10mm - ±0.30mm, flexibly adjusted according to thickness specifications, ensuring uniform thickness and stable base material performance for subsequent processing.
Width Tolerance
Standard tolerance ±1mm - ±3mm; we can optimize it to ±0.5mm through professional finishing process, meeting your high-precision use needs.
Our precise tolerance control not only meets national standards but also exceeds industry average levels, ensuring product consistency and usability, and saving your time and cost in subsequent use.
Benefits of Galvanized Steel Coil
Galvanized steel coil offers outstanding performance and versatility for various industrial and construction applications. It provides excellent corrosion resistance at a more competitive cost compared with stainless steel, and its durable zinc coating ensures long service life even in harsh outdoor and humid environments. The smooth, uniform surface and stable mechanical properties make it highly suitable for efficient processing and mass production.
Other advantages of galvanized steel coil are:
• High cost-performance
• Low maintenance
•Strong durability
• Easy processing
• Flexible customization
• Stable quality
Typical Applications
Galvanized steel coil is widely used in key industries with excellent corrosion resistance and processability.
Construction Industry:
Roll-formed into structural members such as C/Z beams, roof and wall panels, scaffolding and guardrails for buildings, factories and warehouses.
Machinery Manufacturing
Processed into casings, brackets, hardware parts and toolboxes for agricultural machinery, electrical equipment and logistics systems.
Home Appliances & Daily Use
Stamped into casings for refrigerators, washing machines and air conditioners, as well as furniture frames and metal packaging.
Why choose us as your Hot-dip galvanized coils manufacturer?
We are a professional and reliable factory with stable production capacity, committed to supplying high-quality hot-dip galvanized coils. We support large-scale orders while ensuring stable delivery and consistent product performance.
We provide flexible and tailored customization services for Galvanized Sheet Coil to fully meet your specific needs. And we can support by competitive prices and responsive customer service ,we strive to be your trustworthy partner.
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