1. Beautiful and novel shape, rich color, strong decoration, flexible combination, can express different architectural styles;
2. light weight (6~10kg/m²) high strength (yield strength 250~550MPa), with good skin stiffness, waterproof agent good seismic performance;
3. convenient construction and installation, reduce installation and transportation workload, shorten the construction period;
4. profited steel plate is environmentally friendly building materials, recyclable, the promotion and application of profited steel plate in line with the policy of sustainable development of national economy.

Due to its high-standard corrosion-resistant and water-proof characteristics. Colored corrugated sheets are widely used in the modern construction industry and residential areas. For the construction industry, corrugated steel roofing sheet is popular in building factories, warehouses, departments, stores, barns, stables, cattle sheds, etc. Colored corrugated roofing also has an excellent performance in most residential construction projects, such as houses, makeshift houses, garages, storage rooms, log cabins, sheds, etc. All contribute to its low installation cost and good performance to corrosion resistance, the pre-painted corrugated roofing sheet appears on more and more public buildings nowadays including cinemas, exhibition halls, gyms, schools, and hospitals.

Hot rolled steel sheets are available in a wide range of grades, each with its own unique characteristics. Choosing the correct grade is therefore essential to produce a high quality end product in the most economical way.
Lai can help customers to select the right grade for each application. We are also prepared to work with our customers by providing the best technical and production support.

Plating Finish
The hot rolled sheet (pickled) is coated with ol to prevent rusting. Lubricants used in the forming process may also remain on the surface. All such impurities and traces of impurities present on the surface must be removed prior to starting the planing operation.

Rust protection
In order to provide maximum protection against rust and at the same time promote degreasing, hot rolled sheets are treated lightly and evenly with a low viscosity oil that is easy to remove but still provides excellent protection against rust, as the sheets are or are lightly oiled, they may rust if exposed for a long time after lay-up.

Welding
The manufacture of a satisfactory end product depends to a large extent on the selection of a suitable welding method and the skills of the welder. The appropriate method should be determined according to the desired appearance and strength of the final product as well as economic considerations.

Shipbuilding
The product is characterised by high strength, low temperature toughness and high heat input welding to meet customer requirements such as complexity and diversity of quality in the lighter weight trend of ships in recent years. Mostly used for bulkheads, upper decks and hatch covers of tankers, bulk carriers, container ships and LNG carriers.

Pressure vessels
Due to the frequent use in high-pressure environments, the product has excellent heat and corrosion resistance. Mostly used in gas storage tanks, crude oil storage vessels, boilers, heat exchangers, power generation equipment, etc.

General / welded construction
The use of this product has expanded as structures have become larger and larger. It is mainly used in bridges, industrial machinery, buildings and marine structures.

Pipelines
As a steel with high strength and excellent low-temperature toughness or weldability, it is used for the production of pipelines such as steel pipes for high-volume transportation of crude oil and natural gas, oil casing and marine structural steel pipes.

The main industries that consume cold-rolled steel sheets include construction, machine building, automotive, white goods and consumer goods.

In the construction sector, cold-rolled sheets are primarily used to produce steel structures, bent closed and open profiles, facade elements, doors, etc.

In transport machine building and manufacture of white goods, cold-rolled sheets are predominantly used to manufacture bodies and load-bearing elements of cars and vehicles. Cold-rolled sheets should have good formability and a surface suitable for the application of various coating materials.

These steel are also used to manufacture tableware, packing materials and houseware for various applications. Large consumers of coldrolled sheets include service metal centres, which render their services to different sectors, from construction to instrumentation engineering. Using high-precision automated equipment, these companies cut, bend, machine and drill goods and parts made from cold-rolled steel sheets.

Hot-dip galvanized steel coils are available with a pure zinc coating through the hot-dip galvanizing process. It offers the economy, strength and formability of steel combined with the corrosion resistance of zinc. The hot-dip process is the process by which steel gets coated in layers of zinc to protect against rust. It’s especally useful for countless outdoor and industrial applications.

They are mainly used in building roof, door, window, roller shutter doorand automobile’s vehicle shell, chassis, door, trunk lid, Oil tank, and fender, and also electric equipments, such as refrigerator base and shell and so on.

Strong corrosion resistance, 3 times that of galvanized steel sheet.
The density of 55% aluminum is smaller than the density of zinc. When the weight is the same and the thickness of the plating layer is the same, the area of the galvalume steel sheet is 3% or larger than that of the galvanized steel sheet.

The common prepainted galvanized steel coil colors include sky blue, grey, silver, traffic red, moss green, olive green, leaf green, etc.
Welcome to send us a RAL color code or pattern or a sample to customize your own PPGI coated coil.

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.

1.The cold-rolled coil products are accurate in size, uniform in thickness, and the thickness difference of the coils generally does not exceed 0.01-0.03 mm or less, which can meet the requirements of high-precision tolerances.

2.It is possible to obtain extremely thin strips that cannot be produced by hot rolling (up to 0.001 mm or less).

3.The surface quality of cold-rolled products is superior, there are no defects such as pitting, hot-pressed iron oxide, etc.,which are often found in hot-rolled coils, and coils of different surface roughness (glossy or hemp) can be produced according to user requirements. Rough surface, etc., to facilitate the processing of the next process.

4.The cold rolled plate has a good mechanical properties and process properties (such as higher strength, lower yield limit, good deep drawability, etc.).

5.High-speed rolling and full-continuous rolling can be realized with high productivity.

Hot rolled steel coils are used in the manufacture of steel structures, pipes and closed sections, as well as closed structures and façade elements. Profiled and round tubes are used in the industry mainly for

1. Steel structures and frames to support industrial and civil facilities
2. Protective covers for various utility lines (wires and cables, plastic or other pipes)
3. Support for major pipelines, water supply lines and heating networks, bridges and trestles
4. Sewer lines, flue pipes and ventilation systems
5. For road construction – utility poles, guide rails, drainage elements, lighting posts and crash barriers
6. Steel structures for sports fields and children’s playgrounds, vertical fences and partitions and other solutions

Key requirements for such rolled products in this market segment include minimum dimensional tolerances, heavy coil weights, weldability, high strength and toughness, resistance to cracking (also at negative temperatures) and external resistance for certain specific spheres. Recently, there has been a trend in the construction sector to replace cold rolled steel products with cheaper, thin hot rolled products. However, high-strength rolled product types are now widely used to reduce the weight of products.