8/9/2019 Corten 2011

1/6

GlenMetals

Solutions in Steelwww.glenmetals.com

COR-TENa coat for all

weathers

8/9/2019 Corten 2011

2/6

8/9/2019 Corten 2011

3/6

Strength

EconomicBenefitsCorrosion is a major factor in many branches of industry. High costs are incurred by the

rebuilding of corrosion damaged structures, but the cost of oxidation prevention by

painting 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 advantageof improved weathering properties.

Paint lasts longer on

COR-TENThe 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 of

paint can last twice as long as a coating on ordinary

steel. If weathering steel is continuously exposed to

water, it is usually always recommended to be painted.

An advantage of using weathering steel in wet

conditions is that it, in case of local effects on paint

coating, corrosion on the spot progresses more slowlythan common steel.

Typical applications

Steel framed buildings, bridges, tanks, hoppers, chutes,

containers, cable trays, exhaust systems, rail & roadvehicles, chimneys, ducting, transmission towers and a

wide range of structural applications including building

facades and even sculptures.

8/9/2019 Corten 2011

4/6

Self healing

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

Mn

Maximum 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)

TemperatureC

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 ReLfor COR-TEN steels and as R for COR-TEN steels and as ReHfor 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 products

COR-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 B

COR-TEN A

COR-TEN Thickness mmStrip products

Plate products

Yield strengthRelN/mm

2

Minimum

Tensile strengthRmN/mm

2

Minimum

ElongationAso%Minimum

Mechanical properties and Thickness Range

-

0.8 - 10.0

6.0 - 40.0

6.0 - 12.0

345

345(HR/RMP) 310(CR)

485

485(HR/RMP) 450(CR)

19

20(HR/RMP) 22(CR)

S355J0WS355J2W

S355J0WP

EN10025-5:

2004

Yield strength ReH N/mm2

Minimum Thickness mm

-

355

Tensile strength Rm N/mm2

Minimum Thickness mm

-

510 - 680

Elongation R80 %

Minimum Thickness mm

14 15

14 15

A5 % Minimum

Thickness 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.

Thicknessesmm

CR

Stock Range

0.80 - 1.60

HR

1.50 - 10.0

RMP

10.0 - 40.0

Solutions in Steelwww.glenmetals.com

8/9/2019 Corten 2011

5/6

Advantages ofCOR-TEN

Protection

Develops its own

protective film

which slows the

rate of corrosion

Exhibits more

favourable

properties than

that of mild steel

at elevated

temperatures (up

to 800C).

Its increased

strength over mild

steel can allow a

weight saving of

approximately

30%

Saves the cost of

initial painting and

the maintenance

costs of repainting

Weathers to a

natural brown

colour (which

darkens gradually)

and compliments

the surrounding

environment

costsaving

strength

properties

protection

environment

Thicker more

durable zinc

coatings are

obtainablecompared to

ordinary carbon

steel when

utilising hot dip

galvanising, giving

possible cost

savings over

stainless steel

The chemical

composition gives

better resistance

against acidaccelerated

corrosion

compared to

ordinary carbon

steel

The same paint

systems used for

normal carbon

steel can beapplied to

COR-TEN to

render up to twice

the functional

paint life

Up to 12mm thick,

welds with the

same facility as

mild steelhowever its

greater strength

must be

considered when

selecting a

welding procedure

Painted areas

which are

damaged will

weather to a

protective film,

inhibiting under

paint creep

welds

paintlife

resistance

costsavings

Costs less than mild

steel that has been

subsequently coated

by conventional

means

coating

inhibiting

www.glenmetals.com

8/9/2019 Corten 2011

6/6

Please contact Glen Metals and one of

our COR-TEN experts will deal with

your enquiry: -

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

Head Office

ASD metal services - Tel: 0113 254 0711

Contact

www.glenmetals.com