Opportunities for innovative steel products

Use and potential use of steel vs. competitor products

Roof sheeting

Truss

• Steel trusses replacing timber trusses;

• Continuing expansion of use of light steel frames, replacing timber door frames;

• Steel flooring (+ insulation material covering);

• Steel roof trusses replacing timber trusses; • Profiled coated steel sheeting replacing concrete roof -tiles

Walls –load

bearing

Walls

Non-load bearing

Flooring structure

Walls Cladding • More innovative systems, working with insulation developments- accelerating

building process if developed further.

F

R

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Capitalise on/ promote other advantages of using steel structures, i.e.:

• Speed of erection (crucially saving indirect costs in terms of time,)

• Thermal efficiency

• Ease of adaptation

Ste

el

2

1. Aesthetic appeal

Now that we know a bit about Chromadek

My top reasons for Chromadek…. ?

Variety of great colours

2. Corrosion protection

Predictable life cycle

3. Resistance to UV

6. Lightweight

Reduces load on supporting structure

(lighter weight per area vs basis

Less fading, more stable

5. Thermal efficiency

Its really cool (designed to be heat reflective)

7. Flexibility Traditional straight roof or innovative curved roofing designs

3

• Chromadek is specified as a minimum zinc coating of Z200 & ULTIM is Z275

• Key changes to optimise the paint system enhanced colour retention & stability

• On going paint development has led to more heat reflective Chromadek® colours

• Chromadek® has the following advantages:

- improved edge protection

- less prone to formability cracking that could lead to corrosion problems

• All Chromadek® material is branded on the back of the sheet.

• Chromadek® is the registered trade mark for the range of organic coated steels

manufactured solely by ArcelorMittal South Africa.

• By specifying Chromadek®, the purchaser can be certain that the product has been

comprehensively tested and evaluated with full technical back-up.

• Visit the Chromadek website (www.chromadek.com) for more

Things to remember about Chromadek

4

1. Aesthetic appeal

What goes into Chromadek

Why a paint coating?

making a surface more appealing. This includes colour, gloss and

surface structure

2. Corrosion protection A paint gives barrier properties to water and to corrosive agents

3. Resistance to UV

Even if a given colour or gloss can be achieved with almost any paint,

the aesthetic effect can only be guaranteed if the topcoat is stable (as a

function of time. Colour and gloss changes should be limited when the

paint is exposed to sunlight.

4. Mechanical properties and surface robustness

During service, some mechanical properties are needed, such as:

hardness, scratch resistance, wear resistance, abrasion resistance

What is Pre-painted Steel?

5

Prepainted steel is generally composed of:

A steel substrate protected by a surface treatment, a primer

and a topcoat.

6

What differentiates Chromadek ?

The ultimate corrosion barrier, galvanised

Zn offers the best edge protection, insist on it

Zn based steel roofing provides ultimate corrosion protection

A few paint system quick facts …

7

…the substrate? The steel substrate is hot-dip galvanized. The zinc layer gives a first

protection against corrosion in Z200 or Z275 for Chromadek and ULTIM

…the surface treatment? The surface treatment is the first step in coil coating.

This is a very thin layer of a few nanometers to ensure the adhesion of

the organic layer to the substrate enhancing the corrosion resistance.

…the primer? The role of the primer is to promote adhesion ensuring the corrosion

resistance of the top or bottom coat application, usually applied from

5μm.

8

…the topcoat? The topcoat provides the required surface characteristics, such as final

appearance (colour, gloss, texture,…), hardness, resistance to

ultraviolet and resistance to abrasion.

…the back coat? Similar to the top coat with less harsh exposure and most importantly

to guard against opportunistic corrosion derived from moisture and

condensation (in certain instances the back coat is unwashed and this

presents an opportunistic area for failure), this is where ULTIM is

superior

9

This is why Chromadek is a preferred roofing

solution:

10

What makes Chromadek better ?

Chromadek ULTIM:

• The paint system configuration on the back coat

• Newer paint system formulation to improve fading

• Can go into a 1km coastal corrosive zone up to 400m

(closer distance to coast application, more design choices)

Next steps for ULTIM:

• Product and Promotion launch

Out with the old in with the new……..

Standard Chromadek® Chromadek® Plus

Chromadek® 20µm

Zinc coating (Z200-14µm)

Zinc coating (Z200-14µm)

Steel

Single backing coat (8µm)

Primer: 5µm

Pre-treatment

(conversion layer)

Pre-treatment

(conversion layer)

Chromadek® 20µm

Zinc coating (Z275-19µm)

Zinc coating (Z275-19µm)

Steel

Primer: 5µm primer

Pre-treatment

(conversion layer)

Pre-treatment

(conversion layer)

Primer 20µm

Chromadek® 20µm

Zinc: Z200 (14µm)

Top Coat: 20µm Polyester/Polyurethane

Primer: Cr-Free Primer 5µm

Backing: 8µm Single Coat Backer

Zinc: Z275 (19µm)

Top Coat: 20µm Polyester/Polyurethane

Primer: 20µm Cr-Free Primer

Backing: 5µm or 20µm Cr-Free Primer &

20µm top

Chromadek®:: >5km from the sea and

heavy industrial exposure

Chromadek® Plus:

If less than 5km but not less than 1km

from the sea or heavy industrial

exposure

12

Chromadek® ULTIM

Out with the old in with the new……..

13

Chromadek® paint systems enhanced

The aesthetic life is governed by the stability of the paint

system against degradation from sunlight (UV, temperature)

which is revealed by the degree of fading.

14

Chromadek® colour range

Heat Reflective

15

Chromadek® colour range

An exciting development Heat Reflective roofing solutions

Four of the colours of the Chromadek® range (See Data Sheet C1.4),

Charcoal Grey, Dark Dolphin, Buffalo Brown and Aloe Green utilize an

advanced thermal technology paint system. This advanced paint system

incorporates a heat reflective pigment providing up to 8°C cooling and

improved durability. The durability of an exterior coating is measured

according to its capability of maintaining gloss, colour and film integrity.

How Heat Reflective Chromadek® Work?

The heat reflective pigments present in Heat Reflective Chromadek®

are chemically inert and highly stable. Heat Reflective Chromadek®

reflects more of the sun’s energy to prevent the coating from absorbing

energy directly resulting in less heat build up resulting in longer life-

cycles (less fading).

It’s really cool !

16

Chromadek®’s warranty by region

Chromadek® is suitable for greater than 5km from the sea and heavy industrial exposure

If less than 5km and less than 1km (up to 400m) from the sea or for heavy industrial exposure

Chromadek® ULTIM is your solution

Helps you to make the right choice by region

Rural un-polluted Urban Inland/ Industrial Marine/ Heavy Industrial

C1/C2@

Low corrosion risk

C3@

Medium risk

C4/C5@

High Corrosion risk

Colour coated

product

# Coating

thickness

(µm)

Dry with occasional

condensation - no specific

pollution.

Higher humidity with some air

pollution or mild coastal (>5

km from HWM)

Exterior environment of

buildings located 1 to 5 km

from HWM

Industrial area, high

humidity/coastal high salinity

(>400m to 1 km from HWM)

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No

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fora

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Chromadek® 40 10 20 10 20 NR NR NG NG

Chromadek®

ULTIM 60 10 30 10 30 10 20 10 15

Branding and marking

17

• If it doesn’t say Chromadek®, it won’t last like Chromadek

®.

• Not all colour roof sheeting is Chromadek®.

• Chromadek®, is marked on the reverse side at intervals of approximately

900mm, parallel to the length of the strip, about 25mm from the edge.

• The letters are approximately 5mm in height and of the dot-matrix type.

Thank you