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8/13/2019 Corten a Steel Weather Resistant Steel
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COR-TEN,CORTEN A,CORTEN STEEL,A242,A558 GR A,S355JOW,
DIFFERENT TYPE AND GRADES OF CORTEN STEEL.
CORTEN A STEEL / Weathe e!"!ta#t !tee$
Ph%!"&a$ P'(et"e!
Weather resistantsteel
StandardTensile StrengthMPa
Yield StrengthMPa
Elongation in 2 inches(min.) %
CORTEN !S steel "#$&'$ ' 2$
RSM "*+# ndianRail,a-s
"$ min '"$ min 2*
STM STM " MN '" min 2*
Che)"&a$ P'(et"e!
Weatherresistantsteel C Mn P S Si Cr Ni Mo C/
Corten $.*2 $.2$$.$
$.$#$$.*$
$.$'$ $.2$.#
$.$*.2
$.& $.2$.
RS M"* $.*$ $.2$."
$.$#$.**2
$.$'$ $.2$.#2
$.'$."+
$.2$$."+ $.'$$.'+
STM
$.2$ $.#*.'$
$.$" M0 $.$$ $.*$.$
$.'$$$ $.$M0
$.2$$."$
AST* A242-+4 "h-Ste#th L'-a$$'% St&ta$ Stee$
Chemicals Com1osition% Tensile Test
C Mn P S C/ Elongation
T-1e*
$.* Ma *.$$ Ma
t3*+.$ % Min
*+.$3t3'.*$
'.*$3t3*$*.&
4radeThi5ness
(t)mmYield Point6si(N7mm2)
Tensile Strength
6si(N7mm2)
$.*Ma
$.$Ma
$.2$Min
$('")Min #$("$) Min Test Piecen (mm)
"&('*) Min ("&$) Min 489(2$$)4892($)
*2*"2(2+$) min &'("') Min
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Remarks:1 For plates wider than24 in(600mm), the Elongatior requirment is reduce Two Percentagepoints2 For normal thic!ness "#16in($mm), the deduction %rom the speci%ied percentage o%elongation in $ in(200mm) &hall 'e made %or decereses o% the nominal thic!ness 'elow"#16 in($mm) &ee elongation requirement adustment under the tension tests section o%
speci%ication 6 %or deduction *alues
S(e&"0"&at"'#! 0' C'te# Stee$ St"( 1 C'"$ a&&'"# t( J"! 325-8SPA- 1 SPA-C6JAPAN STANDA
T-1eS-m:ol
C Si Mn P S C/ Cr NiYield
N7mm2TensileN7mm
SP; $.*2ma
$.2 to$.#
$.2$ to$.$
$.$# to$.*
$."ma
$.2to$.&$
$.'$ to*.2
$.&ma
'"' min "* min
SPC '" min "* min
&tandards
E/ro1eMaterial
no.< = 4> !S ?
Sal@gitter=lachstahl =6
*)
S'?$WP *.+" E '&W '
WR $
ll,esta *$ P >
S'?2WP *.+"& E '&W "
2"2T-1e *
ll,esta *$ =P >
S'?$W *.++ E '&W> ' WR $> SM $W ll,esta *$ >
S'?2W *.+&WTSt2'
E '&W> "
WR $C
SM $
CPll,esta *$ = >
S'6242W *.+ ll,esta *$ =
"$>
1)FK = Tensile strength class
Chemical composition in percent by weight1)[% !"eat analysis)
4rade C Si Mn P S N C/ Cr Ni
ma. ma. ma. ma. ma.
S'?OWP $A*2 $A# ma. *A$$ $A$& $A* $A$' $A$$+') $A2 $A $A'$ *A2 $A&
S'?2WP $A*2 $A# ma. *A$$ $A$& $A* $A$'$ B") $A2 $A $A'$ *A2 $A&
S'?OW $A*& $A$ $A$ *A$ ma. $A$' $A$'$A$$+2)
') $A2 $A $A"$ $A$ $A&
S'?2W $A*& $A$ $A$ *A$ ma. $A$'$ $A$'$ B") $A2 $A $A"$ $A$ $A&
S'62W $A*& $A$ $A$ *A$ ma. $A$'$ $A$'$ B") $A2 $A $A"$ $A$ $A&
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1) The steel ma+ contain a maimum o% 0,6" - .i, 0,/0 - o and 0,1" - r2) Eceeding the speci%ied maimum *alue is permitted i% the phosphorous contentremains 'elow the maimum *alue '+ 0,00" - %or each 0,001 - o% nitrogen howe*er, thenitrogen content must not eceed 0,012 - in the heat anal+sis/) The maimum nitrogen content shall not appl+ i% the steel grades contain at least 0,020- ltotal or su%%icient quantities o% other nitrogen3%iing elements
4) The steel grades contain at least one o% the %ollowing elements ltotal 5 0,020 -, .'0,01" 3 0,060 -, 0,02 3 0,12 -, Ti 0,02 3 0,10 - 7% a com'ination o% these elements ispresent, at least one o% them is contained with the speci%ied minimum content
#echanical properties1)
4radePosition
o
sam1le
Min. -ieldstrength
Tensilestrength
Min. total elongation D%
MPa MPa 8$9 $ mm8$9 A&
FS$
e2)G *& e2)H *& e2)3 ' e2)I ' e2)G 2 2 3 e2)G 2A2A 3
e2)G 'e2)I '
S'?$WP l7t ' *$ &$
"#$ &'$
*&7*" *#7* *7*& 2272$
S'?2WP l7t ' *$ &$
"#$ &'$
*&7*" *#7* *7*& 2272$
S'?$W l7t ' '"*$ &$
"#$ &'$
*&7*" *#7* *7*& 2272$
S'?2W l7t '') '"*$ &$
"#$ &'$
*&7*" *#7* *7*& 2272$
S'62W l7t '') '"*$ &$
"#$ &'$
*&7*" *#7* *7*& 2272$
1) The tensile test *alues gi*en in the ta'le appl+ to longitudinal samples in case o%strip and sheet steel o% widths o% 5 600 mm, trans*erse samples should 'e ta!en2) .ominal thic!ness e 8mm9/) &/"":0;P and &/"":2;P e < 12 mm
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$otch impact energy in condition o deli&ery !minim'm &al'es obtained 'singCharpy( samples)
Gae N't&h ")(a&t e#e%6 P'!"t"'#
? $C
S'?$WP 2# $
S'?2WP 2# 2$
S'?$W 2# $
S'?2W 2# 2$
S'62W "$ 2$
Jerage Jal/es o ' sam1lesK one indiJid/al Jal/e ma- all short o the reL/ired minim/m
Jal/e :- not2)More than '$ %. The sam1le ,idth shall eL/al the 1rod/ct thic5ness i the latter is:et,een *$ mmA')The tests :eing 1erormed /sing sam1les ,hich are similar to Char1- sam1les. TheJal/ess1eciied")n the ta:le a:oJe are to :e red/ced 1ro1ortionall- to the sam1le ,idth.
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COR-TEN, CORTEN, CORTEN A, CORTEN STEEL, A242, A558 GR A,S355JOW,
S&'(eCORTEN a11lies to 1lates /1 to *2.mm in thic5nessA CORTEN > a11lies to 1lates /1 to $mmin thic5ness.
De0"#"t"'#
Weathering means that d/e to their chemical com1ositions CORTEN and CORTEN > steelsA,hen /tilised /n1rotectedA ehi:its increased resistance to atmos1heric corrosion com1ared to/nallo-ed steels. This is :eca/se it orms a 1rotectiJe la-er on its s/race /nder the inl/ence o the,eather.
The corrosion retarding eect o the 1rotectiJe la-er is 1rod/ced :- the nat/re o its str/ct/re
com1onents and the 1artic/lar distri:/tion and concentration o allo-ing elements in it. The la-er1rotecting the s/race deJelo1s and regenerates contin/o/sl- ,hen s/:ected to the inl/ence o the,eather.
=ormationA d/ration o deJelo1ment and 1rotectiJe eect o the coJering la-er on ,eathering steelsde1end largel- /1on the corrosiJe character o the atmos1here. ts inl/ence Jaries and de1endsmainl- /1on general ,eather condition (e.g. continental) macroclimate (e.g. ind/strialA /r:anAmaritime or co/ntr-side climate) and the orientation o the str/ct/re com1onents (e.g. e1osed to orshaded rom the ,eatherA Jertical or hori@ontal 1osition). The amo/nt o aggressiJe agents in the airhas to :e ta5en into acco/nt . n general the coJering la-er oers 1rotection against atmos1hericcorrosion in ind/strialA /r:an and co/ntr-side climate.
When /tilising this steel in /n1rotected condition it is /1 to the designer to ta5e into acco/nt thee1ected loss o thic5ness d/e to corrosion and as ar as necessar-A com1ensate or it :- increasingthe thic5ness o the material.
n cases o 1artic/lar air 1oll/tion :- aggressiJe agents conJentional s/race 1rotection isrecommended. Coating is a:sol/tel- necessar- in cases o contact ,ith ,ater or long 1eriodsA ,hen1ermanentl- e1osed to moist/reA or i it is to :e /sed in the Jicinit- o the sea. The s/sce1ti:ilit- o1aint coats to /ndercree1age :- r/st is less in the case o ,eathering steel than in the case ocom1ara:le non,eathering steel.
A(($"&at"'#!
The corten steel is /sed or Jario/s t-1es o ,eldedA :olted and riJeted constr/ctions e.g. steelrame str/ct/resA :ridgesA tan5s and containersA eha/st s-stemsA Jehicles and eL/i1mentconstr/ctions.
>asic g/idles or the /se o corten steel in the /n1rotected condition are descri:ed in EN *$$2and
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,eather in the /n1rotected condition.
To /se the :eneits o the higher atmos1heric corrosion resistance o CORTEN in com1arison to/nallo-ed steel it is necessar- that design and eec/tion o str/ct/res as ,ell as the 1erormance omaintenance ,or5s allo, an im1eded ormation and regeneration o the 1rotectiJe r/st la-er. Themethods m/st meet the latest reL/irements o technical 1rogress and m/st :e s/ited or the1ro1osed a11lication. G*& ' "#$&'$ 2$
H *& G$ '"
) * M1a 9 *N7mm2
The notched:ar im1act energ- is determined on SO longit/dinal test s1ecimans at a tem1erat/reo 2$QC as an aJerage o three tests. =or 1rod/ct thic5nesses I*$mm the aJerage Jal/e is at least2# ?. =or thic5nesses :et,een *$mm and &mmA the minim/m im1act Jal/e is red/ced
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:'$t"# a# R"et"#
?oining elements s/ch as :oltsA riJets and their accessories (n/ts and ,ashers) m/st :e so selectedthat the ormation o local electrochemical cells are aJoided. The oining elements sho/ld1reera:l- consist o ,eathering steel.
t these oints ca1illar- action can lead to 1ermanent moist/re res/lting in increased corrosion.
Critical @ones sho/ld thereore :e 1rotected :- 1aintingA sealing or other 1rotectiJe meas/res.n the case o highstrength connections (;) the conditions or non,eathering str/ct/ral steels asgiJen in