Glen Metals

Solutions in Steel

Please contact Glen Metals and one ofour COR-TEN® experts will deal withyour enquiry: -

www.glenmetals.com

Tel: 01236 424 396 Fax: 01236 433 330E: glenmetals@asdmetalservices.co.ukwww.glenmetals.com

Head Office

ASD metal services - Tel: 0113 254 0711

ContactCOR-TEN®

a coat for allweathers

Advantages ofCOR-TEN®

Protection

Develops its ownprotective filmwhich slows therate of corrosion

Exhibits morefavourableproperties thanthat of mild steelat elevatedtemperatures (upto 800°C).

Its increasedstrength over mildsteel can allow aweight saving ofapproximately30%

Saves the cost ofinitial painting andthe maintenancecosts of repainting

Weathers to anatural browncolour (whichdarkens gradually)and complimentsthe surroundingenvironment

cost saving

strength

properties

protection

environment

Thicker moredurable zinccoatings areobtainablecompared toordinary carbonsteel whenutilising hot dipgalvanising, givingpossible costsavings overstainless steel

The chemicalcomposition givesbetter resistanceagainst acidacceleratedcorrosioncompared toordinary carbonsteel

The same paintsystems used fornormal carbonsteel can beapplied toCOR-TEN® torender up to twicethe functionalpaint life

Up to 12mm thick,welds with thesame facility asmild steelhowever itsgreater strengthmust beconsidered whenselecting awelding procedure

Painted areaswhich aredamaged willweather to aprotective film,inhibiting underpaint “creep”

welds

paint life

resistance

cost savings

Costs less than mildsteel that has beensubsequently coatedby conventionalmeans

coating

inhibiting

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Glen MetalsThe COR-TEN® Specialists

Quality Strength Self healingEconomicBenefits

COR-TEN®The steel that protects itself

COR-TEN® is a high strength, low alloy, weldablestructural steel possessing excellent weatheringresistance. It may be used to advantage in the paintedor unpainted condition.

The steel owes its weathering characteristics to the formation of a

tightly adherent protective oxide coating which seals the surface

against further corrosion. The protective layer or ‘patina’ is of a

natural dark brown appearance and if chipped or damaged will

actually repair itself to give continuity of protection and

appearance.

COR-TEN® is particularly recommended for use where high

structural strength is required and where maintenance is difficult.

The colour of the ‘patina’ will be determined by the nature of the

atmosphere and the frequency with which the surface is exposed

to the wetting and drying cycle. As the ‘patina’ blends with many

natural surroundings, increasing use has been made of COR-TEN®

for aesthetic reasons in the current environmentally conscious

world.

Corrosion is a major factor in many branches of industry. High costs are incurred by therebuilding of corrosion damaged structures, but the cost of oxidation prevention bypainting and repainting must also be considered.

Many applications of COR-TEN® show that better economy can be achieved in either the

painted or unpainted form where high strength similar to conventional S355 steels can be used

to construct lighter structures utilising well established design practice, but with the advantage

of improved weathering properties.

Paint lasts longer onCOR-TEN®The surface of weathering steel can be painted usingthe same methods applied in painting ordinary steels.As a result of the special alloying of the steel, a coat ofpaint can last twice as long as a coating on ordinarysteel. If weathering steel is continuously exposed towater, it is usually always recommended to be painted.An advantage of using weathering steel in wetconditions is that it, in case of local effects on paintcoating, corrosion on the spot progresses more slowlythan common steel.

Typical applicationsSteel framed buildings, bridges, tanks, hoppers, chutes,containers, cable trays, exhaust systems, rail & roadvehicles, chimneys, ducting, transmission towers and awide range of structural applications including buildingfacades and even sculptures.

COR-TEN® B S355J0W and S355J2WCOR-TEN® A S355J0WP

Steel Grades

MaterialProperties

COR-TEN® EN 10025-5:2004

COR-TEN® B 0.19COR-TEN® A 0.12

C

0.30 - 0.650.25 - 0.75

Si

0.80 - 1.250.20 - 0.50

MnMaximum Maximum Maximum

Content % (ladle analysis)

Chemical Composition

0.035 max.0.07 - 0.15

P

0.0300.030

S

0.020 - 0.060.015 - 0.06

Al

0.02 - 0.10-

V

0.25 - 0.400.25 - 0.55

Cu

0.40 - 0.650.50 - 1.25

Cr

0.400.65

Ni

COR-TEN® BCOR-TEN® A

Smallest allowable internal bending radius mm

Thickness mm

Formability values apply to all forming directions

-6

-8

-10

-12

2121

2424

3030

3636

4242

48-

54-

60-

COR-TEN® A

Thickness mm

Carbon Equivalent CEV

CEV= C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15

0.8 - 10.0

CEV typical

0.35

Product

Strip products

Normalising 860 - 940(target 910

Stressrelieving

550 - 600(target 580)

Temperature°C

1 minute / mm thickness, minimum 15 minutesFree cooling in air atmosphere outside the oven.

2 minutes / mm thickness, minimum 30 minutesSlow cooling in the furnace

Treatment TimeManner of cooling

Heat Treatment

The yield strength is guaranteed as ReL for COR-TEN ® steels and as R for COR-TEN® steels and as ReH for weathering steel gradesaccording to EN 10025-5:2004. A Charpy V impact test is carried out on standard steels equivalent to COR-TEN® B.

Steel grades and their approximatecorrespondence for weatherresistance.

COR-TEN® A 6.0 - 12.0 0.39 Plate productsCOR-TEN® B 6.0 - 20.0 0.48 Plate productsCOR-TEN® B (20.0) - 40.0 0.50 Plate products Rural

Corrosion allowance to be added forone side of the nominal thicknessfor each 10-year period of workinglife. First 10 year period mm

Type ofatmosphere

Example of corrosion allowance foruntreated COR-TEN® steel

0.10

Each following10 year periodmm

0.05Urban1) 0.20 0.05Industrial2) 0.20 0.10

(2) -3 (3) -4 (4) -5 (5) -6 (6) -7 (7) -8 (8) -10 (10) -12 (12) -14 (14) -16 (16) -18 (18) -20

COR-TEN® BCOR-TEN® A

COR-TEN® Thickness mmStrip products

Plate products

Yield strengthRel N/mm2

Minimum

Tensile strengthRm N/mm2

Minimum

ElongationAso %Minimum

Mechanical properties and Thickness Range

-0.8 - 10.0

6.0 - 40.06.0 - 12.0

345345(HR/RMP) 310(CR)

485485(HR/RMP) 450(CR)

1920(HR/RMP) 22(CR)

S355J0WS355J2W

S355J0WP

EN10025-5:2004

Yield strength ReH N/mm2

Minimum Thickness mm

-

355

Tensile strength RmN/mm2

Minimum Thickness mm

-

510 - 680

Elongation R80 %Minimum Thickness mm

14 15

14 15

A5 % MinimumThickness mm

20

20

2 - 16 2 - (3) 2 (2) - 2.5 3 - 40

355

355

470 - 630

470 - 630

16

16

(16) - 40 3 - 40 (2.5) - (3)

1)With the chief impurity in the air being sulphur dioxide, SO2.2)In addition to SO2. the air also contains chloride. Also for locations inthe immediate vicinity of salt water.

ASD Glen Metals is part of the largest independent steel stockholding group in theUnited Kingdom and is the leading UK Stockholder of COR-TEN® products.We hold themost comprehensive range of both standard and non-standard sizes of COR-TEN®sheet and plate in the UK. Furthermore, the company has extensive coil stocks fromwhich non-standard lengths can be cut.

With over 25 years experience of supplying COR-TEN® products to UK industry, we have

successfully demonstrated our strong commitment to customer satisfaction in terms of

quality and reliability of service.

Our own extensive processing capabilities, backed by group resources, enable us to meet all your

needs in COR-TEN®

Thicknessesmm

CR

Stock Range

0.80 - 1.60

HR

1.50 - 10.0

RMP

10.0 - 40.0

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