Color Coated Steel Coil

Color coated steel is used in a variety of applications, especially in the construction and automotive industries. At Wanzhi Steel, there are 3 color coating lines with an annual output of over 300,000 tons. Available in coil, strip, and sheet, our color coated steel comes in an array of colors, patterns, paints, and finishes to suit various design requirements.

Wanzhi Steel offers color-coated steel coils in both galvanized and galvalume substrates. Also, we have a wide selection of paints, such as PE, HDP, SMP, PVDF, etc. We also use some famous paint brands, such as Nippon Paint, Winter Paint, Akzo Paint, etc. Welcome to contact us for more details!

Color Coated Steel Coil Specifications

Item	Color Coated Steel Coil
Substrate	CR, GI, GL
Thickness	0.12 mm-2.0 mm
Width	600 mm-1,500 mm
Coil Weight	3-8 tons (can be customized)
Paints	PE, SMP, HDP, PVDF
Paint Thickness	Top: 10-35 μm   Back: 5-14 μm
Colors	As per RAL Color (custom patterns are available)
MOQ	10 tons
Package	Standard Export Package

Types of Color Coated Steel Coil

Different substrates can be used for color-coated steel. And cold-rolled sheets, galvanized sheets, and galvalume sheets are commonly used.

1. Color Cold Rolled Steel Coil

The color-coated coil, with cold-rolled steel as its base metal, has a smooth and attractive appearance. And it maintains the processing performance of cold-rolled steel. However, cold-rolled steel is prone to rusting when there are any minor scratches on the surface. Hence, color cold-rolled steel products are only recommended for indoor applications with low requirements.

2. Prepainted Galvanized Steel Coil (PPGI Coil)

The most popular type of color-coated steel uses galvanized steel as its base metal, including both hot-dip galvanized sheets and electro-galvanized sheets. Hot-dip galvanized steel is particularly favored as a base material. These prepainted galvanized steel coils are protected from rusting by a layer of zinc and organic coatings. Hence, its service life is longer than that of the hot-dip galvanized sheet. Despite this, due to their smooth surface and attractive appearance, they are widely used for interior decoration, steel furniture, home appliances, and other similar applications. The zinc thickness of the hot-dip galvanized substrate ranges from 30 g/㎡ (double-sided) to 275 g/㎡. You can choose according to the use environments.

3. Electro-galvanized Color-coated Steel

Color coated steel is also made using electro-galvanized sheets as the substrate. However, the zinc layer on the electro-galvanized sheet is typically thin, with a range of 10-30 g/㎡, making it unsuitable for use in exterior wall or roof panels. Despite this limitation, electro-galvanized color coated steel is valued for its attractive appearance and outstanding processing performance, making it a popular choice for home appliances, steel furniture, interior decoration, and other applications.

4. Colour Coated Galvalume Coil (PPGL Coil)

You can also find color coated steel coil with galvalume steel (55% Al-Zn alloy coating) as metal, that is, PPGL coil. Galvalume coil has superior corrosion resistance, as well as excellent adhesion and flexibility. So it is widely used in home appliances, construction, etc.

Popular Colors of Color Coated Steel Coil

According to our sales data, the hot-selling colors for pre-painted coil include cement grey (RAL 7033), signal blue (RAL 5005), traffic red (RAL 3020), moss green (RAL 6005), colza yellow (RAL 1021), wine red (RAL 3005), etc. While pattern coils are very popular for ceiling, door, or interior decoration. It all depends on your needs and preference. If you want other colors or patterns, please contact us for a custom design.

Note: The actual color may differ slightly due to the different coating materials, light, etc. But we promise to use the paint as agreed upon in the contract.

Applications of Color Coated Steel Coil

Pre-painted steel coils can be slit, sheared, and profiled for different uses, for example,
1. Construction uses, for example, walls and roofs of public buildings, workshops, prefabricated houses, integrated houses, door panels, window frames, ceilings, partitioning walls, roller shutters, guard gates, etc.
2. Transportation industry, such as decorative panels of cars, bodies of trains or ships, containers, back panels, hoardings, tractors, ship compartments, etc.
3. Home Appliances, are mainly used to make side or back panels or shells of refrigerators, washing machines, air conditioners, electric stoves, etc. 
4. Steel Furniture, like wardrobes, lockers, radiators, lampshades, tables, beds, bookcases, shelves, etc.
5. Other Industries, such as advertising boards, traffic signboards, elevators, whiteboards, etc.
Considering its flexible uses and good formability, it is profitable to invest in pre-painted steel coils.

Why Purchase Pre-painted Steel Coils?

As an emerging material, colour coated sheet is very popular in our life. But it is a kind of material, which makes it a great investment project. Let’s review its features.

1. Easy to Transport & Cheap Price

Compared to color coated steel sheets, coils are easier to transport. In this way, it will save your shipping cost. Besides, the color coated steel coil price is cheaper.

2. Wide Applications

As a kind of material, the color coated coil has features like light in weight, beautiful appearance, and good processability. That’s why it is popular in many areas. Its wide usage and cheap price make it promising to invest in.

3. Easy Processing

Due to the good formality, it is easy to shear, or shape the color steel coils according to different applications. You may just need less equipment and simple operation. While it is cheaper than end products. For large projects, it will greatly lower your investment cost.

4. Less Maintenance

Because of its excellent corrosion resistance of galvanized steel or galvalume steel, prepainted steel coil and products made of color-coated steel require less maintenance. For investors, you will never worry about after-sales problems. While for users, it is a cost-effective choice.

5. Friendly to the Environment

Colour coated sheet coil is good for the environment. For example, there is no need to undermine if using color coated steel as building materials, which is good for the environment. Even the used color coated steel can be reused.

Prepainted Steel Coating Process

The coating process is the process by which a steel coil is coated continuously. The steel coil will go through uncoiling, welding, press rolling, inlet looping, pre-treatment (including chemical degreasing and chemical conversion), primer coating, drying, cooling, finish coating, drying, cooling, outlet looping, and coiling. Below is a flow chart for your reference.

Through the coating process, both sides of the steel coil are coated twice. Generally, the back coating thickness is 5-14 μm and the top one is 11-35 μm, which can be customized according to your needs. Below is a picture showing the coating structure.

Color Coated Steel Coil Price

The colour coated coil price starts from $600 to $1,100 per ton on the market. It will be different with the base metal, paint types/brands, paint thickness, width, thickness, etc. Keep reading for more details!

1. Substrates

According to the substrate, there are 3 kinds of color-coated steel coils to choose from, namely, cold-rolled steel (CR), galvanized steel (GI), and Al-Zn-coated steel (GL). Among them, CR is the cheapest one, but its corrosion resistance is not as good as that of GI or GL. Commonly, it is often used as an interior lining panel, lamp, etc. While PPGL is expensive, it is a great building material because of its great corrosion resistance and reflectivity. Below is a video for your reference.

2. Paintings

The commonly-used coatings include polyester (PE), silicone modified polyester (SMP), high durability polyester (HDP), and polyvinylidene fluoride (PVDF). PVDF is more expensive than others, while its physical properties are also much better. Also, it is suggested to choose the paint according to the different use environments.

Items	Cost	Durability	Colors	Film Integrity	UV Resistance	Chalking Resistance	Dirt Resistance
PE	Low	Good	Rich	Excellent	Medium	Good	Poor
SMP	Medium	Good	Rich	Good	Medium	Good	Medium
HDP	Medium	Very Good	Rich	Good	Very Good	Very Good	Good
PVDF	High	Excellent	Limited	Good	Excellent	Excellent	Good

3. Main Painting Methods

1. Paint the top surface twice, and the back surface once. Bake twice. The single-layer back paint has poor resistance to corrosion and scratch, but it has good adhesion. So it is ideal for sandwich panels.

2. Both the top and back sides are painted twice and baked once. The back paint has good corrosion and scratch resistance and good adhesion. Therefore, it is suitable for single-layer corrugated sheets and sandwich panels.

3. Paint the upper and lower surfaces twice and bake twice. It has great resistance to corrosion and scratch and good workability, but poor adhesion. So this kind of steel coil is used for corrugated sheets, but is not suitable for sandwich panels.

You can choose painting structure and painting types according to the uses of the color coated steel coil. If you want more details, please let us know.

How to Choose Prepainted Steel Coil?

There are many factors to consider before purchase, such as the substrate, coating, thickness, cost, etc. Below are some tips for your reference.

1. Take the use environment into account

The first thing is to take the corrosion of the use environment into consideration, such as the snow load capacity, corrosive factors, etc. It matters how to choose the substrate, thickness, coating, paint structure, etc. So inform us where and what you will use the color coated coil for, and our professional sales team will offer suitable options.

2. Pay more attention to product quality

There are many color-coated steel coils on the market. Some are very cheap. But you need to pay more attention to the quality rather than the price. If possible, you can ask for samples for reference or visit the factory on-site.

3. Take your budget into consideration

You need to make the best choice according to your budget. For the other thing, it is important to compare the price to get the most cost-effective solution. Welcome to contact us for a price list!

4. Cooperate with the company with great service

Service is also very important. You need to choose the pre-painted steel coil suppliers who offer great service, such as product warranty, after-sales system, etc. Taking Wanzhi Steel for example, we have a full service system with professional engineers and multilingual consultants to serve you 24*7 hours a week.

Conclusion

Wanzhi Steel is one of the leading pre-painted steel coil suppliers in China. We have a wide variety of color coated coils for sale, such as red, blue, grey, green, etc. The thickness availability is from 0.12 mm to 2.0 mm and the width availability is from 600 mm to 1,500 mm. Besides, we offer custom solutions to meet special requirements. More than that, we will offer discounts for bulk orders. Welcome to contact us for sample products or come to visit us on-site!

Tips for Buying Color Coated Steel Coil

1. Confirm the base metal, mainly including GI and GL, as well as the zinc or Al-Zn coating thickness; cold rolled color coated steel is not recommended.

2. Choose the coating types and the coating thickness, generally 10/5 μm (top/back). The common paints are PE (7-8 years service life), SMP (10-12 years), HDP (15+ years), and PVDF (20+ years); And the top and back paints can be different. Moreover, we commonly adopt twice painting for double sides. If you have special requirements, please let us know.

3. Determine the color or pattern, surface (smooth or embossed, matte or glossy, etc.), and specifications (including width, length, thickness, coil weight, etc.);

4. Inform us of the order quantity. The MOQ is 10 tons. But considering the shipping cost, 25 tons (a full container) will be better.

5. Please leave us your other requirements, such as packaging, samples, surface treatment (such as oiling, passivation, etc.), and more.

6. It is available to visit our factory and office online or on-site. Also, we will offer free samples if you need them.

So if you have any questions, please contact us. We will get you back in 12 hours. You can also call us directly for more details.