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HDG Coil

Thickness: 0.12–6.0mm
Width: 600–1500mm
Zinc coating: 30–600g/m²
Surface: Coated
Process: Hot-rolled
Coil ID: 508/610mm
Length: Customized
Standard sizes: e.g., 0.12–6.0×1500mm

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Description

What is HDG Coil?

HDG Coil is made by immersing a steel coil in a molten zinc bath. This hot-dip galvanizing process forms a thick, protective zinc coating on the steel surface. The result is a coil that combines the strength of steel with the corrosion resistance of zinc.

Key Properties

Corrosion Resistance

The zinc coating acts as a sacrificial barrier. Even if the steel substrate is scratched, the zinc will corrode first, protecting the steel underneath. This makes HDG Coils ideal for outdoor applications, such as roofing, fencing, and construction in harsh environments.

Durability

With enhanced corrosion resistance, HDG Coils have a long lifespan. They can withstand years of exposure to weather, moisture, and other environmental factors without significant degradation, reducing the need for frequent replacements and maintenance.

Good Formability

Our HDG Coils maintain excellent formability, allowing for easy shaping and processing into various products. Whether it's being rolled into sheets for roofing or formed into complex structures for industrial applications, the coil can be worked with precision.

Product name	Galvanized steel coil
Hs code	721049
Standard	JIS G3302, ASTM A653M / A924M, IS277/92, AS 1397, EN 10142, EN 10147, DIN 17162, ES C. D7. 001 or equivalent
Grade	SGCC, SGCH, DX51D, DX52D, DX53D, S220GD, S250GD+Z, S280GD+Z, S320GD+Z, S350GD+Z, S550GD+Z.
Thickness	0. 11~4. 0mm
width	97-1250mm
Zinc coating	30-275g/m2
Coil id	508mm/610mm
Surface finish	Regular Spangle, Minimized Spangle, Zero spangle(Extra Smooth), Skin-Passed,
Surface treatment	Chromated / Unchromated Treatment, Oiled or Resin Coated (Anti Finger Print), Dry
Hardness	soft hard(HRB<60);medium hard(HRB60~85);full hard(HRB85~95)
Yield Strength	140-300 (DQ Grade)
Tensile Strength	270-500 (CQ Grade)/270-420 (DQ Grade)
Elongation Percentage	22 (CQ Grade thickness less 0. 7mm) / 24 (DQ Grade thickness less 0. 7mm)

Applications

Construction Industry

HDG Coils are widely used in roofing and wall cladding. Their corrosion resistance ensures the longevity of buildings, protecting them from rain, snow, and sunlight. They are also used in the construction of scaffolding, where durability and safety are crucial.

Automotive Industry

In the automotive sector, HDG Coils are used for parts like chassis components and body panels. The corrosion resistance helps cars withstand road salt, water splashing, and various weather conditions during their lifespan.

Manufacturing of Industrial Equipment

HDG Coils find application in the manufacturing of storage tanks, ventilation ducts, and agricultural equipment. Their ability to resist corrosion in industrial and agricultural environments makes them a preferred choice.

Our Factory's HDG Coils

Our factory is equipped with advanced production lines and strict quality control systems.

Customizable Specifications

We offer HDG Coils in a wide range of thicknesses, widths, and zinc coating weights to meet specific project requirements. Whether you need a thin coil for delicate applications or a thick one for heavy-duty use, we've got you covered.

High-Quality Assurance

Every coil undergoes rigorous testing for quality, including checks for coating thickness, adhesion, and mechanical properties. This ensures that our customers receive products that meet international standards and perform optimally in their intended applications.

Hdg coil classification, product range and properties

Standards applied in different countries to set the requirements for hot dipped galvanized steel coils specify steel grade and size ranges for these products. Hot dipped galvanised coils are classified based on the following features:

● Application of coated steel (profiling, cold forming, manufacture of steel structures)

● Chemical composition of coating material (pure zinc, zinc-iron/zinc-aluminium/aluminium-zinc/zinc-magnesium alloys, etc)

● Thickness/weight of protective coating

►HDG coils according to European standards

Galvanised steel coils as per the European EN 10346, can be coated with zinc, zinc-iron alloy, zinc-aluminium alloy, aluminium-zinc alloy or aluminium-silicon alloy:

● Zinc coating (Z) is achieved by dipping the prepared strip into a bath with molten alloy, containing at least 99% zinc. This is the most common and traditional way of protecting rolled steel from corrosion.

● Zinc-iron coating (ZF) is formed by dipping a strip into a bath of molten zinc (at least 99% zinc) with further annealing to form a zinc-iron coating with an Fe content of 8-12%. Such coating is stronger than the traditional zinc coating and has better adhesion with substrate steel due to mutual diffusion between the iron and zinc in the surface layers. That is why this coating is less exposed to lamination or pitting under impact, mechanical stresses or deformation of treated products.

● Zinc-aluminium coating (ZA) is applied to rolled steel by dipping it into a bath of zinc and about 5% aluminium with a minor content of mishmetal (mix of metals). Rolled steel with such coating has better formability and corrosion protection properties compared with zinc-coated steel.

● Aluminium-zinc coating (AZ) is applied by dipping steel into a bath of molten metal consisting of 55% aluminium and 1. 6% silicon (with the remaining being taken up by zinc). The combined action of these metals ensures the best corrosion protection compared with other coatings.

● Aluminium-silicon coating (AS) is created by dipping steel into a bath of molten metal containing aluminium and 8-11% silicon. Galvanized steel coil with such coating is highly resistant to oxidation at high temperature (up to 650°C) and highly resistant to chemical corrosion.