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Prepainted color steel sheet

SSSC’s prepainted color steel sheet in coil (PPGI/PPGL) is manufactured from the steel base: SSSC’s GI/GL with the finish paint coating of either polyester or PVDF or SMP and the primer paint coating of either expoxy or PU.

SSSC’s PPGI/PPGL coil has the glossy surfaces, its machinability is suitable for applications of fabrication, forming, etc.

The SSSC’s PPGI is in accordance with the standards: JIS G3312, ASTM A755/A755M, SSSC’s standard: TCTMM.

The SSSC’s PPGL is in compliance with the standards: JIS G3322, ASTM A755/A755M, SSSC’s standard: TCCS04.

Samples of color of SSSC’s prepainted color steel sheet.

Specifications of product

Thickness (mm) 0.16 to 2.00
Width (mm) 1250
Unit coil weight (ton) 10
Painting film thickness (µm) 6 ÷ 30
Coil inner diameter (mm) 508

Production process chart

QUALITY STANDARDS (SSSC’s standards – TCTMK and TCCS-04)

  • T-bend (both sides): ≤ 4T
  • Erichsen: The rate of grids with painting layers peeled off is ≤ 5%
  • Impact (applied to CQ quality only): The painting layer is not peeled off from the steel base. 
  • Pencil hardness: ≥ 3H
  • Rubbing with M.E.K solvent: The painting layer is not peeled off from the steel base.
Sides Standard
Top finish ≥ 100 dr
Bottom backer ≥ 70 dr
Bottom monocoat ≥ 70 dr

Width tolererance: 0 ÷ 7 mm
Thickness tolerance: It shall apply to the thickness after prepainting.

Nominal thickness

Width< 1000 mm

Width 1000 ÷ 1250 mm

< 0,25

+ 0,08 / - 0,03

+ 0,08 / - 0,03
0,25 ÷ < 0,40

+ 0,09 / - 0,04

+ 0,09 / - 0,04

0,40 ÷ < 0,60

+ 0,10 / - 0,05

+ 0,10 / - 0,05

0,60 ÷ < 0,80

+ 0,11 / - 0,06

+ 0,11 / - 0,06

0,80 ÷ < 1,00

+ 0,11 / - 0,06

+ 0,12 / - 0,07

1,00 ÷ < 1,25

+ 0,12 / - 0,07

+ 0,13 / - 0,08

1,25 ÷ < 1,50

+ 0,14 / - 0,09

+ 0,15 / - 0,10

Paint film

For 04 layers (Unit: µm)

Layers

Paint coating

Finish layer 12 ÷ 20
Top primer layer 5 ÷ 7
Bottom primer layer 5 ÷ 7
Backer layer 7 ÷ 10

For 03 layers (Unit: µm)

Layers

Paint coating

Finish layer 12 ÷ 20
Top primer layer 5 ÷ 7
Bottom monocoat layer 8 ÷ 10

* Remarks: The standards of other paint coatings shall be agreed by the manufacturer and the purchaser.

Gloss of paint coating

Width Type
Wavy-edge (max) Center buckling (max)
< 1000 8 6
>= 1000 9 8

Appearance: The product must be free from defects that are detrimental to its practical use.

Sides Duration (hrs)
Top side ≥ 500 hrs
Bottom side ≥ 200 hrs

MARKING, PACKING AND MAINTENANCE

Packing

The product is packed either in accordance with the SSSC’s regulation or the customer’s requirement.

Transport and maintenance:

Transport: Transporting the product must avoid a big impact, which may be detrimental to quality, shape and appearance of the product.
Maintenance: It complies with the guide on maintenance attached on the product.

APPLICATIONS