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TECHNICAL GUIDEWELDING

INTRODUCING OUR NEW PRODUCTNOMENCLATUREBisalloy Steels has recently introduced a new productnomenclature. The following table details the gradeequivalents.Note: Only the designation has changed – not the productPrevious NameNew NameBISPLATE 60BISALLOY Structural 60 steelBISPLATE 70BISALLOY Structural 70 steelBISPLATE 80BISALLOY Structural 80 steelBISPLATE 100BISALLOY Structural 100 steelBISPLATE 80PVBISALLOY Structural 80 PressureVessel steelBISPLATE 320BISALLOY Wear 320 steelBISPLATE 400BISALLOY Wear 400 steelBISPLATE 450BISALLOY Wear 450 steelBISPLATE 500BISALLOY Wear 500 steelBISPLATE 600BISALLOY Wear 600 steelBISPLATE HIA - Class 1BISALLOY Armour RHA300 steelBISPLATE HIA - Class 2BISALLOY Armour RHA360 steelBISPLATE HTABISALLOY Armour HTA400 steelBISPLATE UHTBISALLOY Armour UHT440 steelBISPLATE HHABISALLOY Armour HHA500 steelBISPLATE UHHBISALLOY Armour UHH600 steel 02 BISALLOY is a registered trade mark of Bisalloy Steels Group Limited, ABN 22 098 674 545

WELDING OF BISALLOY QUENCHEDAND TEMPERED STEELSGeneral InformationHYDROGEN CONTROLAll grades of BISALLOY steel can be readily welded usingany of the conventional low hydrogen welding processes.To ensure adequate welding of BISALLOY steel, it isnecessary to be more mindful of the levels of hydrogen,preheat temperatures and arc energy inputs in order tominimise the hardening and maintain the properties of theweld Heat Affected Zone (HAZ).Their low carbon content and carefully balanced, butrelatively small additions of alloying elements (Mn, Cr, Mo,B) ensures good weldability, in addition to the advantages ofhigh strength, impact toughness and high hardness.Particular attention must be paid to the control of hydrogencontent to minimise the risk of weld and HAZ cracking.Weld hydrogen content is minimised by careful attent ionto the cleanliness and dryness of the joint preparationsand the use of hydrogen controlled welding consumables.Recommendations on the correct storage and handling ofconsumables may be obtained from welding consumablemanufacturers, for instance the use of “Hot Boxes” forstorage and reconditioning are required when using manualmetal arc welding electrodes . Refer WTIA Tech Note 3 forfurther guidance.HEAT AFFECTED ZONE PROPERTYCONTROLThe HAZ, a region directly adjacent to the weld, experiencesa thermal cycle ranging from unaffected parent plate to nearmelting at the fusion boundary.The properties of this zone are determined by the steelcomposition as well as the cooling rate.2016 TECHNICAL GUIDE - WELDING 03

STEEL COMPOSITIONTable 1:BISALLOY steel gradePLATETHICKNESS(mm)CARBONEQUIVALENT(IIW) TYPICALCETTYPICALAVERAGE60, 70, 80,100, 320, 4005 - 160.400.2960, 70, 80,320, 40016 - 320.500.3560, 70, 80,320, 400 32 - 800.540.3260, 70, 80,320, 40081 - 1000.580.344506 - 2025 - 500.460.580.300.365008 - 1000.620.4260012 - 500.750.52BISALLOY Steel grades and chemical compositions may bedivided into categories based on Carbon Equivalent and CETas seen in Table 1:Notes:1.C.E. (IIW) C Mn Cr Mo V Cu Ni65152.CET C Mn Mo Cr Cu Ni102040These categories give an indication of the degree of carerequired in the proper selection of welding preheat/heatinputs.COOLING RATELimitations on both preheat and heat input are necessary toensure that the HAZ cools at an appropriate rate and thatthe correct hardness and microstructure are achieved. Tooslow a cooling rate can result in a soft HAZ and thus a lossof tensile and fracture toughness properties. Too rapid acooling rate produces a hard HAZ which may cause loss ofductility.Cooling is controlled by a balance between preheat and heatinput for a particular plate thi c kness and joint configuration.PREHEAT/ HEAT INPUTThe preheat/heat input recommendations outlined in tables2 and 3 will ensure that the cooling rate of the HAZ issatisfactory.04 BISALLOY is a registered trade mark of Bisalloy Steels Group Limited, ABN 22 098 674 545

RECOMMENDED PREHEAT/INTERPASSTEMPERATURES ( C) FOR BISALLOY STEELTable 2:BISALLOY steel gradeJOINT COMBINED THICKNESS (t1 t2 t3) (mm) 30 30 40 40 50 50 100 10060 (AS 3597 Grade 500)Nil*50507514070 (AS 3597 Grade 600)Nil*50507514080 (AS 3597 Grade 700)Nil*505075140100 (AS3597 Grade 0450Nil*Nil*100125 ****500100150150150**600150150150****80 - 450 Grades150150175200220500 Grade150175175200220600 Grade150175175220220Minimum Preheat Temperature C High Strength StructuralGradesMinimum Preheat Temp CAbrasion Resistant GradesMaximum lnterpassTemperature C* Chill must be removed from plates prior to welding.** Refer to Bisalloy Steels for availability, preheat/interpass requirements.***A reduced 100ºC min preheat can be used for product 50 – 60 JCTPERMISSIBLE HEAT INPUT (KJ/MM)FOR BISALLOY STEELTable 3:Note that under rigid weld joint restraint or high ambienthumidity conditions preheating temperature should beincreased by 25ºCWeldingProcessMAXIMUM PLATE THICKNESS IN JOINT(mm) 40 40 60 60 100 0SAW1.0-2.51.0-3.51.5-4.51.5-5.0Heat Input (kJ/mm) Volts X Amps X 0.06Travel Speed (mm/minute)Note: For thicknesses up to 12 mm in structural grades, themaximum arc energy may need to be limited to 1.5 KJ/mmmaximum in specific applications2016 TECHNICAL GUIDE - WELDING 05

WELDING CONSUMABLESWelding Consumable Selection Guide for BISALLOY steel (AS Classifications)Table 4a:MAXIMUM PLATE THICKNESS IN JOINT (mm)BISALLOYStructural 60steelBISALLOY Structural 70steelBISALLOY Structural 80steelBISALLOY Wear100, 320, 400, 450 &500 steelE55XX/E62XX E69XX E76XXN.R. BISALLOY steel gradeMMAW Consumables* Warning:Only use Hydrogen ControlledconsumablesStrength LevelHardnessMatchingLowerE49XXE55XXE55XX/E62XX 1430-AX, 1855-AX MatchingW55XX/W62XX W69XX W50XXW55XX.XW50XXMatchingN.R.N.R.N.R.1855-BX MatchingB T 55X/B T 62X B T 69X B T 76XN.R.LowerB T 49XB T 62XB T 62XB T 55XLowerB T 49XB T 55XB T 55XB T 49XMatchingN.R.N.R.N.R.1430-BX, 1855-BX,1860-BX MatchingW55XX/W62XX W69XX 40XXW40XXMatchingN.R.N.R.N.R.1855-BX GMAW Consumables**Strength LevelHardnessFCAW Consumables***Strength LevelHardnessSAW Consumables****Strength LevelHardnessTable 4a courtesy of WT/A (Tech. Note 15)Notes:**********XMMAW - AS/NZS 4855 consumable classificationGMAW - AS2717.1 consumable classificationFCAW - AS/NZS17632 and AS/NZS18276consumable classificationSAW - AS1858.1 and AS1858.2 consumableclassificationA Variable - any value allowed by the relevantstandard may be acceptable provided thatthe consumable is hydrogen controlled (ielow hydrogen) N.R.E62XX and W62XX type consumables overmatch thestrength requirements but may be usedThese Consumables may be difficult to obtain. Insome cases E62XX, W62XX or B T 62X consumablesmay be substituted, otherwise use E76XX, W76XX orB T 76X typesAS2576 and WTIA TN 4 ClassificationsNot Recommended06 BISALLOY is a registered trade mark of Bisalloy Steels Group Limited, ABN 22 098 674 545

WELDING CONSUMABLESWelding Consumable Selection Guide for BISALLOY steel (AWS Classifications)Table 4b:MAXIMUM PLATE THICKNESS IN JOINT (mm)BISALLOY Wear100, 320, 400, 450& 500 steelBISALLOYStructural 60 steelBISALLOY Structural 70 steelMatchingE80XX/E90XX E100XX E110XXN.R.LowerE70XXE80XXE80XX/E90XXE80XX BISALLOY steel gradeBISALLOY Structural 80 steelMMAW Consumables*Warning: Only use HydrogenControlled consumablesStrength N.R.N.R.1430-AX, 1855-AX MatchingER80S-X/ER90S-X ER100S-X 0S-XGMAW Consumables**Strength hingN.R.N.R.N.R.1855-BX MatchingE8XTX-X/E9XTX-X E10XTX-X E11XTX-XN.R.FCAW Consumables***Strength 430-BX, 1855-BX,1860-BX MatchingF8XX/F9XX F10XX XMatchingN.R.N.R.N.R.1855-BX SAW Consumables****Strength LevelHardnessTable 4b courtesy of WT/A (Tech. Note 15)Notes:*MMAW – AWS A5.1-2004 and AWS A5.5 consumableclassification**GMAW – AWS A5.18-2005 and AWS A5.28consumable classification***FCAW – AWS A5.20-2005 and AWS A5.29consumable classification****SAW – AWS A5.17-1997 and AWS A5.23 consumableclassificationXA Variable - any value allowed by the relevantstandard may be acceptable provided thatthe consumable is hydrogen controlled (ielow hydrogen) N.R.E90XX, ER90S, E9XTX and F9XX type consumablesovermatch the strength requirements but may beusedThese Consumables may be difficult to obtain. Insome cases E90XX, ER90S, E9XTX or F9XX typeconsumables may be substituted, otherwise useE110XX, ER110S, E11XTX or F11XX typesAS2576 WTIA TN 4 ClassificationsNot Recommended2016 TECHNICAL GUIDE - WELDING 07

WELDING CONSUMABLESWelding Consumables suitable for matching strength, lower strength and matching hardness are readily availablefrom a range of consumable manufacturers as per following tables 5 to 8.Welding Consumables for Manual Metal Arc Welding (MMAW)Table 5:BISALLOY Structural60 steelBISALLOY Structural70 steelBISALLOY Structural80 steelBISALLOY Wear 100, 320,400, 450 & 500 steelM.S.Alloycraft 90Alloycraft 90 (under)Alloycraft 110 (over)Alloycraft 110N.R.L.S.Ferrocraft 61Ferrocraft 16 TwincoatFerrocraft 61Ferrocraft 16 TwincoatFerrocraft 61Ferrocraft 16 TwincoatFerrocraft 61Ferrocraft 16 TwincoatM.H.N.R.N.R.N.R.Cobalarc 350, 650 or 750M.S.Conarc 70GConarc 80 Conarc 80, Conarc 85 N.R.L.S.Conarc 49C,Easyarc 7018-1Conarc 49C,Easyarc 7018-1Conarc 49C,Easyarc 7018-1Conarc 49C,Easyarc ASpecialisedWeldingProducts(SWP) WAG WeldingAlloys .M.S.N.R.Weldwell PH118Weldwell PH118N.R.L.S.Austarc 16TC, 18TC orAustarc 77Austarc 16TC, 18TC orAustarc 77N.R.Austarc 16TC, 18TC orAustarc 77M.H.N.R.N.R.N.R.Abraso Cord 350, 700M.S.Metrode E9018-D1Metrode E10018-D2Metrode E11018-MN.R.L.S.WAG Speedarc 70181-E WAG Speedarc 7016-EWAG Speedarc 70181-E WAG Speedarc 7016-EWAG Speedarc 70181-E WAG Speedarc 7016-EN.R.M.H.N.R.N.R.N.R.Metrode Methard 350Metrode Methard 650WAG Hardface 400-EWAG Hardface L-EM.S.N.A.N.A.N.A.N.R.L.S.Eutectrode 66*66Eutectrode 66*66Eutectrode 66*66Eutectrode 66*66M.H.N.R.N.R.N.R.N.R.M.S.OK 74.70OK 74.86OK 75.75N.A.L.S.OK 48.08, OK 48.04OK 48.08, OK 48.04OK 48.08, OK 48.04N.A.M.H.N.R.N.R.N.R.OK 83.28 (30 HRC)OK 83.50 (50-60 HRC)Matching StrengthLower StrengthMatching HardnessNot RecommendedNot AvailableN.B. Consumables in brackets will match mechanicalproperty requirements in the majority of instancesas per manufacturer’s recommendations andwhere the appropriate weld procedure isapplied. Weld Qualification procedures should becarried out to establish actual Weld metalproperties.Overmatching strength08 BISALLOY is a registered trade mark of Bisalloy Steels Group Limited, ABN 22 098 674 545