Gloss Finish Color Coated Steel Roll Forming Material Guide: High Gloss Coating, Coil Sizes & Uses

Gloss Finish Color Coated Steel Roll Forming Material

1. Overview of Gloss Finish Color Coated Steel in Roll Forming

Gloss finish color coated steel is the most widely used pre-painted steel in the roll forming industry. It features a smooth, reflective surface that enhances color brightness and provides a clean, uniform appearance.

This material is typically produced using coating systems such as Polyester (PE), SMP, or PVDF applied over galvanized steel (PPGI) or Aluzinc steel (PPGL).

In roll forming, gloss coated steel is the standard choice for roofing panels, wall cladding, trims, and general construction applications due to its balance of cost, availability, and performance.

2. Material Composition & Structure

Gloss coated steel consists of:

• Steel base (cold rolled steel)
• Zinc or Aluzinc coating
• Chemical pre-treatment
• Primer layer
• Gloss topcoat
• Backing coat

Layer Structure:

1. Steel core
2. Zinc or Aluzinc coating
3. Chemical pre-treatment
4. Primer coating
5. Gloss finish topcoat
6. Back coat

3. Available Coil Specifications

Thickness Range

• 0.25mm – 1.2mm

Coil Width

• 600mm – 1250mm

Coil Weight

• 3 tons – 10 tons

Coil ID / OD

• ID: 508mm / 610mm
• OD: up to 1400mm

Tolerance

• Tight thickness tolerance
• Consistent surface quality

4. Mechanical Properties

Typical values:

• Yield Strength: 180 – 350 MPa
• Tensile Strength: 300 – 550 MPa
• Elongation: 10% – 25%
• Hardness: 100 – 180 HB

Grades:

• DX51D
• S320GD / S350GD

5. Coating Types (GLOSS SYSTEM)

Gloss coatings are available in:

Polyester (PE)

• Most common
• Cost-effective

SMP

• Improved durability
• Better UV resistance

PVDF

• Premium performance
• Long lifespan

Coating Thickness

• Top coat: 15–30 microns
• Back coat: 5–10 microns

Gloss Level

• Typically 30–80 GU

Cost Level

• Low to high (depending on system)

6. Surface Finishes

• High gloss
• Semi-gloss
• Smooth reflective finish
• Bright color finishes
• Standard industrial colors

7. Common Roll Forming Applications

Gloss coated steel is used in:

• Roofing panels (PBR, corrugated, trapezoidal)
• Wall cladding
• Flashing and trims
• Gutters and downpipes
• Agricultural buildings
• Residential and commercial projects

8. Advantages of Gloss Finish Coated Steel

• Widely available
• Cost-effective
• Bright and uniform appearance
• Easy to roll form
• Suitable for most applications

9. Disadvantages / Limitations

• Reflective (can cause glare)
• Shows oil canning more visibly
• Lower premium appearance vs matte
• May fade over time (depending on coating)

10. Roll Forming Machine Considerations

Roll Tooling

• Chrome plated rollers recommended
• Smooth surfaces required

Speed

• 15–60 m/min

Lubrication

• Sometimes required

Cutting

• Hydraulic or flying shear
• Clean cut important for finish

Common Issues

• Surface scratching
• Oil canning
• Roller marks
• Paint cracking (tight bends)

11. Common Problems in Production

• Oil canning (more visible due to gloss)
• Surface scratches
• Color inconsistency between coils
• Handling damage
• Roller marking

12. Pricing Guide

Typical global pricing:

• Low: $800–$1000 per ton
• Medium: $1000–$1400 per ton
• High: $1400–$2000+ per ton

Factors affecting price:

• Coating system (PE, SMP, PVDF)
• Base material (GI or Aluzinc)
• Color and finish
• Supplier

13. Comparison with Other Materials

Gloss vs Matte

• Gloss = reflective, standard finish
• Matte = premium, low reflection

Gloss vs SMP

• Gloss = finish type
• SMP = coating system

Gloss vs PVDF

• Gloss = general use
• PVDF = high-performance

14. Best Industries Using Gloss Coated Steel

• Construction
• Agriculture
• Industrial buildings
• Residential roofing
• Commercial cladding

15. How to Choose Gloss Finish Coated Steel

Choose Gloss When:

• Standard roofing and cladding
• Cost is a key factor
• High production speed required
• Widely available material needed

Avoid When:

• Premium architectural finish required
• Low reflection needed
• High-end projects

16. FAQ Section

What is gloss coated steel?

Steel with a smooth, reflective painted finish.

Is gloss coating the most common?

Yes, it is the most widely used.

Does gloss show oil canning?

Yes, more than matte finishes.

Is gloss good for roofing?

Yes, it is the standard choice.

What coating systems are used?

PE, SMP, and PVDF.

17. Machine Matcher Section

We supply roll forming machines for all material types including gloss finish coated steel.

• Custom-built machines to your profile
• New machines built to specification
• Global delivery available
• UK and USA technical support

Contact:
Machine Matcher
Sales & Technical Team

Quick Specs

Thickness
0.25–1.2mm

Yield Strength
180–350 MPa

Coil Width
600–1250mm

Coil ID
508 / 610mm