Quality Steel Products made in Korea

Prepainted Steel Sheet with Silicon Polyester

Product Description

Prepainted steel sheet is coated and baked with paint containing silicon resin.

It is a popular construction material because of its highly weather resistant properties.

Countries, including Korea, that have industrial complexes along their coastal regions will find it more economical to use steel plates coated with Si-P/E paint than PE paint.

- Sandwich panel

- Steel plate for roof in factory complex

- Sandwich panel - Steel plate for roof in factory complex

- Sandwich panel
- Steel plate for roof in factory complex

Cross section


Note 1) Materials used for prepainted steel sheet: GI, GA, EGI, SGL, AL, BP, TFS, TP, SUS, ALCOT etc.

Note 2) 2 COAT 2 BAKING is available for coating layer on both the top and back sides.

Applied materials      

Hot-dip galvanized steel sheet (KS D 3506, GI)

The cold rolled steel sheet passes through a molten zinc pot containing 97% zinc (0.03% or less AL), undergoing the galvanizing process, which gives each side of the sheet and equal thickness of coating.


Surface types for hot-dip galvanized steel sheet (GI)


While an increased volume of coating enhances the anti-corrosion properties of galvanized steel sheet, the workability is inevitably decreased. Anti-corrosion properties, workability, tension, and elongation must be taken into consideration when selecting plates.

  1. The normal wall thickness of galvanized steel plates refers to the thickness of pre-coated steel plates. The clearance of the machine, therefore, must account for the thickness of the zinc plating indicated in Table 1 as well as the coating thickness (usually 25μ).
  2. Zinc flacks may stick inside the metallic pattern during the deep drawing process, requiring extra caution be taken as this may damage the coating's exterior.
  3. Lubrication oil used in treatment shall not contain chlorine or phosphoric acid, which reacts to zinc. Table 1 shows the zinc weight and coating thickness for hot-dip galvanized steel sheet used for prepainted steel sheet. These figures are adopted by KS (Korean Standards), JIS (Japan Industrial Standards), and ASTM (American Society for Testing Materials).

table 1

Electrolytic galvanized steel sheet (KS D 3528, EGI)

The surface of the cold rolled steel sheet (KS D 3512) undergoes a dull finishing treatment, followed by a double-sided coating process (zinc weight: 13g~25g/㎡). Five products are available depending on the coating weight. Electro galvanized iron (EGI) is usually used in home electrical appliances that require extensive workability. Due to its low zinc weight, EGI cannot be used for products that require anti-corrosion properties.


Aluminum steel sheet (KS D 6701)

Specific gravity of aluminum is light yet it possesses high tensile strength. Due to its superb anti-corrosion properties, aluminum is widely used in the production of aircrafts, automobiles, containers, blinds, ceiling material, and composite panels.



Cold rolled stainless steel sheet (KS D 3698)

Due to its anti-corrosion and chemical resistant properties that far exceed other steel products, stainless steel sheet is optimum for products that require extremely high levels of corrosion resistance and durability.
Stainless steel sheet is produced from Iron/Chrome or Nickel/Chrome alloy. STS 304 or STS 430 are used mainly for PCM (JIS uses the symbol SUS).

Size availability 


Quality Tests   


Applied specifications      

KS D 3520, KS D 6711
JIS G 3312, JIS G 3321
ASTM A 653, ASTM A 792
EN 10142, EN 10147