Hot Dipped Galvanized Steel

Hot-dipped galvanized steel combines the strength of steel with the corrosion resistance and durability of zinc coating. It is commonly used in the construction, automobile, and home appliance industries. As a professional supplier of galvanized metal, Wanzhi Steel has two hot dip galvanizing lines with an annual output of 300,000 tons. We can offer hot dip galvanized steel in coil, sheet, plate, and strip, with or free of spangles. The available thickness ranges from 0.12 to 4 mm and the width is from 600 to 1,500mm. Welcome to contact us for more details.

Specifications of HDG Steel

Item	HDG Steel Coil & Sheet
Thickness	0.12 mm-4 mm
Zinc Coating Thickness	30 g/㎡-275 g/㎡
Width	600 mm-1,500 mm
Length	1,000 mm-6,000 mm (sheets/plates)
Coil Weight	3-8 tons (can be customized)
Substrate	Hot rolled steel/cold rolled steel
Surface Structure	Zero spangles, regular (normal) spangles, small (minimum) spangles
Surface Treatment	Passivation treatment, oiling treatment, chromic passivation, etc.
Package	Standard export package

Note: The thickness of cold-rolled galvanized steel is less than 1.5 mm, and the thickness of hot-rolled galvanized steel is 1.5 -4.0mm.

Inspection of Hot-Dip Galvanized Steel

The inspection of hot-dip galvanized steel products includes the base metal material and mechanical properties (tensile test/bending test), thickness, width, length, zinc coating thickness, spangles (surface), packaging, profiles, etc. At Wanzhi Steel, we have a strict quality inspection system. Also, our products are subject to third-party quality tests. Moreover, we can offer samples for your inspection. Welcome to contact us for more details!

Hot Dipped Galvanized Steel Prices

Below are the price charts of hot dipped galvanized steel (from https://tudu.mysteel.com/). As shown in the charts, galvanized steel prices last March were much higher than those in the same period this year. Besides, since the beginning of 2023, hot-dipped galvanized steel prices have shown an upward trend. In March, our HDG coil FOB price ranges from USD 680 to 1,100. It is greatly influenced by zinc coating thickness, thickness, width, order quantity, etc. The galvanized sheet and strip prices will be higher than that of coils (for the same specifications). Welcome to contact us with specification information to get the latest price.

Hot Dip Galvanized Steel Properties

1. Excellent Resistance to Corrosion

The zinc coating forms a barrier that protects the underlying steel from corrosion caused by exposure to moisture, chemicals, and oxygen. It also acts as a sacrificial anode, corroding before the steel, thereby increasing its resistance to corrosion. The thicker the zinc coating, the better the corrosion resistance.

2. Longevity

Hot-dip galvanized steel has a long lifespan due to its high resistance to corrosion, making it suitable for outdoor applications where it is exposed to harsh environmental conditions.

3. Low Maintenance

Galvanized steel requires less maintenance than other types of steel because the zinc coating protects it from rusting and corroding. This leads to lower maintenance costs over time.

4. Toughness

Galvanized steel keeps the properties of steel. It is a durable material that can withstand harsh conditions, including impact and abrasion. Its toughness makes it an ideal material for construction and industrial applications.

5. Cost-effective

Although the initial cost of galvanized steel may be higher than untreated steel, its long lifespan and reduced maintenance costs make it a cost-effective solution over time.

6. Aesthetics Appearance

HDG steel has a shiny and smooth appearance with beautiful spangles (or zero spangles) so that it can be used directly. Moreover, it can be embossed or painted to meet different applications.

Uses of HDG Steel

HDG steel is mainly used in construction, home appliances, automobile manufacturing, containers, transportation, and other industries.

In the construction industry, it is widely used as roofing sheets, gutters, downpipes, sewers, partition walls, exterior wall decoration, ventilation ducts, fire pipes, prefabricated houses, guardrails, steel warehouses, steel structures, rolling doors, ceiling brackets, etc.

Besides, HDG steel is also the base metal for PPGI steel. And it is popular in home appliances, such as air-conditioning accessories, back or side panels or shells of electrical equipment, freezers, etc. 

How Is Hot-dip Galvanized Steel Made?

Hot-dip galvanized steel is produced by a continuous hot-dip galvanizing process with hot-rolled steel or cold-rolled steel as the substrate. That is, continuously immerse the base metal into the molten zinc bath (at 450 degrees) to apply a layer of zinc coating to its surface. Before galvanizing, the base metal will be degreased, washed, dried, and then annealed first. It is available in sheet and coil.

According to GB/T 2518-2008, the code of HDG products includes steel grade (or serial number), steel characteristics (if any), hot-dip galvanizing (D, E for electro galvanizing), coating type (Z/AZ/ZAM), and thickness (number). For example, DC51D+Z30 refers to cold rolled HDG steel for general uses and the zinc coating weight is 30 g/m².

Conclusion

Wanzhi Steel is one of the top China hot dip galvanized steel coil manufacturers. There are two hot galvanizing lines and an electro galvanizing line at our factory. The zinc coating thickness of our HDG steel products ranges from 30 to 275 g/m². Besides, we also supply galvanized checkered sheets and coils for sale. As a wholesale supplier, we sell at a factory-direct-sale price. Welcome to contact us for a free quote!