Wholesale Galvanized Steel Coil from China Manufacturer
Galvanized steel coils are mainly classified into two mainstream types based on their processing methods: hot-dip galvanized steel coils and cold-dip galvanized (electro-galvanized) steel coils. There are also special galvanized coils: aluminized zinc steel coils, zinc-aluminum-magnesium anti-corrosion steel coils, and galvanized patterned steel coils, etc., with a complete range of specifications and thicknesses. China factories can meet various processing needs.
The coating grades of hot-dip galvanized (continuous hot-dip galvanizing) and cold-dip galvanized (continuous electro-galvanizing) steel coils comply with the national standards GB/T 2518-2019 and GB/T 15675-2020, respectively, and are mainly classified according to four dimensions: coating type, coating weight, surface quality, and application performance.
The standard range for hot-dip galvanized coating weight grades (total weight on both sides, g/m²) is 30～600 g/m², with common grades as follows:
|
Grade Codes: |
Double-sided weight: |
Single-sided thickness (≈μm) |
Applicable Scenarios |
|
Z30 |
30 |
2.1 |
Extremely light corrosion protection, dry indoor environments |
|
Z60 |
60 |
4.2 |
General indoor use, internal components of household appliances |
|
Z80 |
80 |
5.6 |
General indoor and outdoor use, billboards |
|
Z100 |
100 |
7 |
Regular outdoor use, construction site fencing |
|
Z120 |
120 |
8.4 |
Moderate corrosion protection, light industrial equipment |
|
Z180 |
180 |
12.6 |
High corrosion protection, chemical workshops |
|
Z275 |
275 |
19.3 |
Heavy-duty corrosion protection, bridge and highway guardrails |
|
Z350～Z600 |
350～600 |
24.5～42.0 |
Special high corrosion protection, marine and heavy industry |
The standard range for cold-dip galvanized coating weight grades (total weight on both sides, g/m²) is 3～90 g/m², with common grades as follows:
|
Grade Codes: |
Double-sided weight: |
Single-sided thickness (≈μm) |
Applicable Scenarios |
|
Z3 |
3 |
0.2 |
Temporary protection, disposable supplies |
|
Z5 |
5 |
0.4 |
Electronic components, precision instruments |
|
Z10 |
10 |
0.7 |
Home appliance internal parts, office equipment |
|
Z20 |
20 |
1.4 |
Interior decoration, light-load components |
|
Z30 |
30 |
2.1 |
General indoor use, electrical cabinets |
|
Z40 |
40 |
2.8 |
Higher requirements indoor use, furniture |
|
Z90 |
90 |
6.3 |
Highest grade cold galvanizing, light outdoor use |
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Cold-Rolled Galvanized Steel Coil
China's leading cold-rolled galvanized steel coil manufacturer boasts strong wholesale and processing capabilities. In wholesale, relying on a large-scale production base, its annual capacity reaches millions of tons, with ample stock available. Specifications cover thicknesses of 0.2-5.0mm and widths of 600-1500mm, supporting customized zinc coatings of 60-275g/m², and strong bulk supply capabilities. It also provides deep processing services such as slitting, leveling, bending, and stamping.
Hot-Dip Galvanized Steel Coil
Hot-dip galvanized steel coil manufacturers supply a wide range of specifications with customizable width, thickness, and zinc coating (Z80–Z350) to meet different industrial requirements. As a China steel coil manufacturer and supplier, Lingchuang provides wholesale and project procurement solutions with value-added services including slitting, leveling, bending, and welding, helping customers reduce downstream processing costs and improve efficiency.
Lingchuang is a professional Galvanized Steel Coil manufacturer and supplier in China. Welcome to import quality products from our factory here.
