RuukkidoublegradeS420MH/S355J2HRectangularRuukkidoublegradeS420MH/S355J2HisastructuralhollowsectionthatmeetstherequirementsofstandardEN10219.ItcombinesthehighstrengthofgradeS420MHandtheexcellentusabilityofgradeS355J2H.BydesigningthestructureusinggradeS420MH,considerableweightreductioncanbeachievedandlongerspanscanbeusedinstructures.RuukkidoublegradereplacesS355J2HasastockgradeandissuitableforalltheS355J2HandS420MHapplications.

Applications:

Frameworkstructuresofbuildings

Bridgestructures

Railings

Frameworkstructuresformachinery,transportationvehiclesandliftingequipment

Pillars

Masts

Theinformationonourwebsiteisaccuratetothebestofourknowledgeandunderstanding.Althougheveryefforthasbeenmadetoensureaccuracy,thecompanycannotacceptanyresponsibilityforanydirectorindirectdamagesresultingfrompossibleerrorsorincorrect

applicationoftheinformationofthispublication.Wereservetherighttomakechanges.

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Documentprintedon01.06.2013 www.ruukki.com

Dimensions

Outsidedimensionsmm

Wallthicknessmm/Weightkg/m

HxB 2.0 2.5 3.0 4.0 5.0 6.0 7.1 8.0 8.8 10.0 12.5

40x20 1.68 2.03 2.36

40x30 1.99 2.42 2.83

50x30 2.31 2.82 3.30 4.20

60x40 2.93 3.60 4.25 5.45 6.56

70x50 3.56 4.39 5.19 6.71 8.13

80x40 3.56 4.39 5.19 6.71 8.13

80x60 5.17 6.13 7.97 9.70

90x50 5.17 6.13 7.97 9.70

100x40 5.17 6.13 7.97 9.70

100x50 5.56 6.60 8.59 10.5 12.3

100x60 5.96 7.07 9.22 11.3 13.2

100x80 6.74 8.01 10.5 12.8 15.1

120x40 5.96 7.07 9.22 11.3 13.2

120x50 6.35 7.54 9.85 12.1 14.2

120x60 6.74 8.01 10.5 12.8 15.1

120x80 7.53 8.96 11.7 14.4 17.0 19.4 21.4 23.1 25.6

120x100 8.31 9.90 13.0 16.0 18.9

140x60 8.96 11.7 14.4 17.0

140x70 7.92 9.43 12.4 15.2 17.9

140x80 9.90 13.0 16.0 18.9

150x50 7.53 8.96 11.7 14.4 17.0

150x100 11.3 14.9 18.3 21.7 24.9 27.7 30.0 33.4

160x70 13.6 16.8 19.8 25.2

160x80 10.8 14.3 17.6 20.8 23.8 26.4 28.6 31.8

160x90 11.3 14.9 18.3 21.7 24.9 27.7 30.0

180x100 16.8 20.7 24.5 28.3 31.4 34.2 38.1

180x120 18.0 22.3 26.4 30.5 34.0 36.9 41.3 48.7

200x80 16.8 20.7 24.5 28.3 31.4 34.2 38.1

200x100 18.0 22.3 26.4 30.5 34.0 36.9 41.3 48.7

200x120 23.8 28.3 32.7 36.5 39.7 44.4 52.6

220x120 25.4 30.2 35.0 39.0 42.5 47.5

250x100 26.2 31.1 40.2 49.1

250x150 30.1 35.8 41.6 46.5 50.8 57.0 68.3

260x140 35.8 41.6 46.5 50.8 57.0 68.3

260x180 39.6 46.1 51.5 56.3 63.2

RuukkidoublegradeS420MH/S355J2HRectangular

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Outsidedimensionsmm

Wallthicknessmm/Weightkg/m

HxB 2.0 2.5 3.0 4.0 5.0 6.0 7.1 8.0 8.8 10.0 12.5

300x100 30.1 35.8 41.6 46.5 50.8 57.0 68.3

300x150 40.5 47.2 52.8 64.8 78.1

300x200 45.2 52.8 59.1 64.6 72.7 88.0

400x200 54.7 63.9 71.6 78.4 88.4 108.0

Recommendedseries

Downloadhollowsectionsdimensionsandcrosssectionalproperties

Properties

Mechanicalproperties

Comparison between the mechanical properties of Ruukki double grade S420MH / S355J2H and the EN 10219 steelgradesS355J2HandS420MH.

Rp0.2MPaMinimum

RmMPaT

Torsion/515% Compression/010% Compression/515%

Processinginstructions

Hotdipgalvanising

The thickness of the zinc layer created during hotdip galvanising depends on the silicon content of the steel. Ruukkiguarantees a silicon content of 0.150.25% for double grade structural hollow sections.Whenusingappropriate hotdipgalvanisingmethodsthisallowstheformationofazinclayerofover100m,whichissufficientformostapplications.

Machining

Ruukkiusesmicroalloyingandlowcarboncontent initsfinegrainsteels.Forthisreason,longitudinallyweldedjointdoesnotharden,whichdecreasesthewearofcuttingblades.ComparedtogradeS355J2H,thetensilestrengthofRuukkidoublegradeisonly30MPahigher,whichmeansthatmachiningpropertiesofthetwosteelgradesaresimilar.

Forming

The formabilityofRuukkidoublegrade isparticularlygood. Itsminimumelongation is thesameaswithS355J2H,whichensuresexcellentdeformationcapacity. Inaddition, thesteelgradehasauniformmicrostructureandavery lowsulphurcontent.Thisensures,forexample,excellentexpandability.

Welding

Ruukkiguaranteesamaximumcarbonequivalentof0.39fordoublegradestructuralhollowsections.Therefore,theproductcan be welded with all conventional welding methods and no special measures, such as preheating, are needed.Recommended welding consumables are shown in table 4. The structural engineer must take the steel gradespecificminimumandmaximumweldspecificationsintoaccountwhendesigningwelds.

Whenwelding structures that requirewelding qualifications in compliancewith standardEN 2871, the qualification testmustbepassedat theminimum inmaterialclass2.1of thestandard ISO5608.Suchstructures include,amongothers,steelstructuresmadeincompliancewithEN10902.

Weldingconsumablerecommendations

Weldingprocess Manufacturer/Distributor Wire(+Gas)

MAGwelding ESAB OKAutrod12.51+M21

ELGA ElgaMatic100+M21,CO2

RETCOOY ISAFIS10BRONZE+M21,CO2

LINCOLNELECTRIC LincolnLNM26+M21

RuukkidoublegradeS420MH/S355J2HRectangular

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Weldingprocess Manufacturer/Distributor Wire(+Gas)

OYUDDEHOLMAB BhlerWeldingEMK6+M21

IMPOMETOY OerlikonCarbofil1+M21,CO2

FluxcoredarcweldingMetalcoredwire

ESAB OKTubrod14.12+M21

ELGA ElgaMXA100+M21

RETCOOY TrimarkMETALLOY76+M21

LINCOLNELECTRIC LincolnOSMC710H+M21

OYUDDEHOLMAB BhlerWeldingMV70+M21

IMPOMETOY OerlikonFluxofilM8+M21

FluxcoredarcweldingFluxcoredwire

ESAB OKTubrod15.14+M21,CO2

ELGA ElgaDWA50+M21

RETCOOY TrimarkTM770+M21

LINCOLNELECTRIC LincolnOS71EH+M21,CO2

OYUDDEHOLMAB BhlerWeldingRV71+M21

IMPOMETOY OerlikonFluxofil14HD+M21

FluxcoredarcweldingNongaswire

ESAB Coreshield8

ELGA

RETCOOY

LINCOLNELECTRIC LincolnISNR203Ni1

OYUDDEHOLMAB

IMPOMETOY

MetalarcweldingwithcoveredelectrodesGeneralpurposeelectrode

ESAB Esab48.00/Filarc35

ELGA ElgaP48S/48M

RETCOOY SOUDOMETALCOMETJ50+

LINCOLNELECTRIC LincolnCONARC48

OYUDDEHOLMABIMPOMETOY

BhlerWeldingFOXEV50OerlikonTenacito

MetalarcweldingwithcoveredelectrodesHighefficiencyelectrode

ESAB Esab38.65/FilarcC6HH

ELGA ElgaMAXETA11

RETCOOY

LINCOLNELECTRIC LincolnCONARCV180

OYUDDEHOLMAB

IMPOMETOY

Order&delivery

Identification

Hollowsectionsareinkjetmarkedwiththefollowinginformation:

TheRuukkiemblem

Product

RuukkidoublegradeS420MH/S355J2HRectangular

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Productdimensions

Identificationnumber

Basedonthisinformation,itispossibletotracebackthemanufacturingandrawmaterialdata,ifneeded.

Inspectioncertificate

Mechanicalpropertiesare tested from the finishedhollowsectionsand theyarenormallysuppliedwithanEN102043.1inspectioncertificate.

Generaldeliveryinformation

GeneraldeliveryinformationcanbefoundfromdocumentGeneraltermsofsale.

Thecontentofthisdocumenthasbeencreatedfromwebpagelastupdated12Nov2012Oursalesandtechnicalsupportarehappytogiveyoumoreinformation.Visitwww.ruukki.com/contactus.

RuukkidoublegradeS420MH/S355J2HRectangular

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