dinox904L ES4000

Welding procedure

Strip DINOX 904 L

Flux ES 4000

Electroslag strip welding DINOX 904 L and Flux ES 4000

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Welding procedure

Table of Contents

1.0 Base Material.........................................................................................................................................21.1 Chemical analyses of Base material.........................................................................................................2

2.0 Preparation of base material for welding..........................................................................................22.1 Control of surface before welding.............................................................................................................22.2 Cleaning of the surface...............................................................................................................................2

3.0 Heat treatment.......................................................................................................................................23.1 Preheat temperature...................................................................................................................................23.2 Interpass temperature.................................................................................................................................23.3 Interpass annealing.....................................................................................................................................23.4 Post heat treatment.....................................................................................................................................2

4.0 Procedure...............................................................................................................................................24.1 Welding equipment......................................................................................................................................24.2 Welding consumables.................................................................................................................................2

4.2.1 Strip trade name.......................................................................................................................................24.2.2 Flux trade name........................................................................................................................................2

4.3 Chemical analyses of Strip DINOX 904 L................................................................................................24.4 Chemical analyses of weld deposit 1st layer polished surface..............................................................24.5 Chemical analyses of Flux ES 4000 (wt%)..............................................................................................2

5.0 Welding...................................................................................................................................................25.1 Apparatus settings.......................................................................................................................................25.2 Bead dimension...........................................................................................................................................25.3 Special requirements for welding head....................................................................................................2

6.0 Mechanical properties..........................................................................................................................26.1 Side bend test according to ASME Section IX........................................................................................26.2 Hardness results..........................................................................................................................................2

7.0 Metallographic results..........................................................................................................................27.1 Macro – 1st layer to base material EN1043-1..........................................................................................27.2 Ferrite control...............................................................................................................................................2

8.0 Corrosion test........................................................................................................................................2

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Welding procedure

1.0 Base MaterialASTM 516 Gr. 70 Heat Nr. 94343 (Quenched and tempered)

1.1 Chemical analyses of Base material

C Mn Si Cr Ni Mo Cu Al Ti0.079 1.690 0,243 0,193 0,977 0,290 0,045 0,022 0,002

Zr V P S Nb0,001 0,013 0,004 0,001 0,002

2.0 Preparation of base material for welding

2.1 Control of surface before weldingThe surface has to controlled by dye penetrant test

2.2 Cleaning of the surfaceThe surface has to be free of moister and by grinding free of oxides and residues.

3.0 Heat treatment

3.1 Preheat temperaturemax. 150°C.

3.2 Interpass temperaturemax 200 °C

3.3 Interpass annealingnot required

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Welding procedure

3.4 Post heat treatment

Heating Rate °C 50 °C/hour Max.Holding Temperature 580 °C MinHolding time 6 hoursCooling rate 75 °C/hour Max.

4.0 Procedure

4.1 Welding equipmentLincoln 2x 1000 A DC

4.2 Welding consumables

4.2.1 Strip trade name

DINOX 904 L 60x0,7 mm

4.2.2 Flux trade name

DIMEX ES 4000

4.3 Chemical analyses of Strip DINOX 904 LHeat No. 201014 60x0,7 mm

C Si Mn Cr Ni Mo N Co Cu0,010 0,11 2,0 24,40 28,6 5,10 1,70P S Fe Ti0,008 0,003 bal. 0,14

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Welding procedure

4.4 Chemical analyses of weld deposit 1st layer polished surface

C Si Mn Cr Ni Mo N Co Cu0,014 0,35 1,39 20,83 24,70 4,84 0,043 1,36

P S Fe Al0,013 0,008 bal. 0,031

4.5 Chemical analyses of weld deposit 1st layer deposit.and analyses taken 3 mm from weld surface.

C Si Mn Cr Ni Mo N Co Cu0,017 0,35 1,36 20,80 24,55 4,51 0,042 1,32

P S Fe Al0,013 0,009 bal. 0,027

4.5 Chemical analyses of Flux ES 4000 (wt%)EN 760-SA FB 2 DC

SiO2 Al2O3 TiO2 ZrO2 MnO CaF2 CaO MgO P S8,4 27,2 60,6 <0,02 <0,02

Screen properties< 0,2 > 0,2 >0,315 > 0,5 > 0,8 > 1,0 > 1,25 > 1,6 > 2,0 mm0,5 4,4 38,9 56,1 ---- 0,1 ---- 0,0 %

Basicity acc. to Boniszewski:

2,5 Heat No. 13 Grainsize 2-14

Welding procedure

5.0 Welding

5.1 Apparatus settings

Current 1000 A (DC + CP) Flux Height 35 mmVoltage 24-25 V Feed Rate 1,5 m / min. (~ 24kg/hr)Travel Speed 15 cm/Min Dilution ~12%Stickout 35 mm

5.2 Bead dimension

Bead Height 5,1 mm Bead Width 63,0 mmOverlap 4,0 - 5,0 mm

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Welding procedure

5.3 Special requirements for welding headThe welding head must be set with a 3° inclination towards welding direction.

Welding procedure

6.0 Mechanical properties

6.1 Side bend test according to ASME Section IX

QW 462.3 2 side bend test 4tResults 180° no defects

6.2 Hardness results

Hardness HV10Weld deposit 193 199 203Heat aff. zone 236 221 206base material 170 170 170

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Welding procedure

7.0 Metallographic results

7.1 Macro – 1st layer to base material EN1043-1

7.2 Ferrite controlnot required

Welding procedure

8.0 Corrosion testUHA-108

SpecimenIdentification mark

Specimenmark

Material Origin Location Sensilizing treatment

Testperiod

Rep. 350A 350A - Weld Spec/Longitudional - 72hRep. 350B 350B - Weld Spec/Longitudional - 72h

Result: The metal shows no sign of disintegration after bending

Conditions de pilageIdentification mark

Angle Mandret Results and comments

350A 180° 2e The metal shows no sign of disintegration after bendingelongation=21,6%

350B 180° 2e The metal shows no sign of disintegration after bendingelongation=20,5%

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