154967906-304hcu-310n

Int. Conference WELDS 2009, Fort Myers, Florida; June 24-26;, 2009

Welding of the austenitic alloys

Super 304H, 310N and 347H FG


Content

State of the art of development, qualification andapplication of filler metals for the new kind of alloys:

- Super 304 H- 310 N- 347 H FG

Ongoing development


Alloy 740Alloy 617Thick wall Alloy263/Alloy 617

13CrMo447CrMoVTiB10-10X10CrMoVNb9-1Alloy 617

DMV 304HCu/ S304H (SB) up to 610CDMV 310N/ HR3C up to 630 CSanicro 25 up to 650 C steam

400 MW

High pressure partSteam rating 275 kg/s

990 t/hAllowable workingpressure (gauge) 393 bar

SH-Outlet temperature 700 C

ReheaterSteam rating 215 kg/s

774 t/hAllowable workingpressure (gauge) 83 bar

RH-Outlet temperature 720 C

Example of future Coalfired Power Plant

ExampleExample of of futurefuture CoalCoalfiredfired Power PlantPower Plant

Source: after Husemann,

Babcock Hitachi Europe


Source: After BHE 2005

770 C 770 C

DMV617

700 C

Sanicro 25

Alloy 263

DMV310N

HR3C

DMV304HCu

S304H

670 C640 C

615 C

1.4910

DMV347HFG

Material Selection for Austenitic Superheater Tubes;Supercritical Application

Material Material SelectionSelection forfor AusteniticAustenitic SuperheaterSuperheater TubesTubes ;;SupercriticalSupercritical ApplicationApplication

Design

Temperatures

Remark: DMV Grade DMV 304HCu used in shot peened condi tion


Chemical composition of Superheater / Reheater Boiler Tubes

C Si Mn Fe Cr Ni Mo Cu Nb Ti Other

X3CrNiMoN17-131.4910

max.0,04

max.0,75

max.2,00

Rem.16,0-18,0

12,0-14,0

2,00-2,80

--

--

--

N 0,10 - 0,18B 0,0015 - 0,0050

HR3C 0,04-0,10

max.0,75

max.2,00

Rem.24,0-26,0

17,0-23,0

--

--

0,20-0,60

--

N 0,15 - 0,35

DMV310N 0,05-0,07

0,30-0,50

1,00-1,40

Rem.24,4-25,0

20,8-21,5

--

--

0,40-0,50

--

N 0,18 - 0,24

TP 347H FG 0,04-0,10

max.0,75

max.2,00

Rem.17,0-20,0

9,0-13,0

--

--

8 x C--

Super 304H 0,07-0,13

max.0,30

max.1,00

Rem.17,0-19,0

7,5-10,5

--

2,50-3,50

0,30-0,60

--

N 0,05 - 0,12

Sanicro 25 max.0,08

? ? Rem.22,0-24,0

23,0-25,0

--

? ?--

N ?

CCA617NiCr23Co12Mo2.4663

0,05-0,08

max.0,30

max.0,30

max.1,5

21,0-23,0

Rem.8,0-10,0

max.0,05

max.0,03

0,30-0,50

Co 11,0 - 13,0; B 0,002 - 0,005Al 0,80 - 1,30; Pb max. 0,007As max. 0,010; Bi max. 0,010

Alloy 2630,04-0,08

--

max.0,6

max.0,7

19,0-21,0

Rem.5,6-6,1

max.0,2

--

1,9-2,4

Co 19,0 - 21,0; Ti + Al 2,4 - 2,8Al max. 0,6; B max. 0,0005

Alloy 7400,03-0,05

0,3-1,0

0,1-1,0

max.0,7

23,5-25,5

Rem.0,2-0,8

--

1,8-2,2

1,4-1,8

Co 18,0 - 22,0Al 0,9 - 1,3

Superheater steels


Materials DIN EN VdTV ASME Others

VM12-SHC Single Approval (PMA)

TV Rheinland

X3CrNiMoN17-13 pr10216-5 DIN17459

TP347H FG 547 6.2003 Code2159 SA213

Super 304H (SP) 550 9.2003 Code2328-1 SA213

DMV310N Code2115-1 SA213

Single Approval

(PMA)

TV Rheinland

HR3C 546 9.2003 Code2125 SA213

NiCr23Co12Mo 485 9.2001 Code1982 Single Approval (PMA)

Code1956 TV Rheinland

Qualification Status of Superheater Materials


Chemical composition of austenitic Superheater / Reheater Boiler Tubes

0,05-0,12

0,30-0,60

2,50-3,50

7,5-10,5

17,0-19,0

Rem.max.1,00

max.0,30

0,07-0,13

DMV 304H Cu*

--

8 x C--

9,0-13,0

17,0-20,0

Rem.max.2,00

max.0,75

0,04-0,10

DMV 347H FG

0,18-0,24

0,40-0,50

--

20,8-21,5

24,4-25,0

Rem.1,00-1,40

0,30-0,50

0,05-0,07

DMV 310N

NNbCuNiCrFeMnSiC

*) acc. ASME SA-213; code case 2328


Matching Filler Metal for Super 304 H


Matching Filler Metal for Super 304H or DMV 304H Cu / GTAW: Thermanit 304H Cu

Chemical composition of GTA-wire in %

Mechanical properties (all weld metal)

0,210,6316,80,9180,0020,0023,20,40,09

NNbCuNiMoCrSPMnSiC

27,919,4462354+650/+1202

90 82 9455,227,8703533RTGTAW

min. 135+650/+1202

min. 85min. 35min. 590min. 235RTBM requirement

CVN (ISO-V)[J]

R. o. A.[%]

Elongation[%]

TS[MPa]

YS[MPa]

Test temp.( C/ F)


Matching Filler Metal for Super 304H or DMV 304H Cu / SMAW: Thermanit 304H Cu

Chemical composition (all weld metal) in %


0,2090,382,9116,340,9017,690,0050,0103,340,320,087

NNbCuNiMoCrSPMnSiC

39,325,0464350+650/+1202

88 88 9055,130,1711541RTSMAW

min. 135+650/+1202

min. 85min. 35min. 590min. 235RTBM requirement

CVN (ISO-V)[J]

R. o. A.[%]

Elongation[%]

TS[MPa]

YS[MPa]

Test temp.[ C/ F]


GTA-girth welding of Super 304H (DMV 304H Cu) with matching filler metal Thermanit 304H Cu

Thermanit 304H CuFiller metal:


Results of GTA-girth welds withThermanit 304H Cu

Mechanical properties girth weld ( 44,5 x 10 mm; tr ansverse specimen)(Root: rod- 2,0 mm; 100 A; 13 V / Fill passes: rod- 2,4 mm; 135 A; 13 V)

0,450,1893,0515,670,6718,043,330,380,098GTA-wireThermanit 304H Cu

0,480,1233,188,870,2718,310,690,240,095Base metal

NbNCuNiMoCrMnSiC

Chemical composition of GTA-wire in %


22,4521378+500/+932

124 130 14223,8727566RT

CVN (ISO-V)[J]

Elongation[%]

TS[MPa]

YS[MPa]

Test temp.[ C/ F]

BM469+650/+1202

49 57 67 (A = 0,4 cm)BM / WM617RT

CVN (ISO-V) middle weld[J]

LoFTS[MPa]

Test temp.[ C/ F]


Results of GTA-girth welds of DMV 304 H Cu withThermanit 304H Cu

Mechanical properties girth weld ( 44,5 x 10 mm; tr ansverse specimen)(Root: rod- 2,0 mm; 100 A; 13 V / Fill passes: rod- 2,4 mm; 135 A; 13 V)

BM469+650/+1202

49 57 67 (A = 0,4 cm)BM / WM617RT

CVN (ISO-V) middle weld[J]

LoFTS[MPa]

Test temp.[ C/ F]

Outside-: 44,5 mm Outside-: 44,5 mm


Thermanit 304 H Cu


Thermanit 304 H Cu

Creep rupture properties of Super 304 H - welds


Welding of Super 304H; 310N and 347H FG

Welding with Ni base filler metal Thermanit 617;

long time creep test are ongoing


Typical analysis base metal and all weld metal NiCr22Co12Mo9 (2.4627); ERNiCrCoMo-1

0,410,00201,20,3011,0Rest8,721,50,040,060,06FM

1,20,00261,10,3011,4Rest8,722,20,090,090,06BM

FeBAlTiCoNiMoCrMnSiC

Alloy 617

Thermanit 617 is TV approved to use for welding of the newaustenitic steels 347H FG; Super 304H and 310 N


GTA-girth weld: DMV 304H Cu with Ni-base filler metal Thermanit 617

Chemical composition

11,59-0,411,14--53,68,922,70,360,320,063Filler metalThermanit 617

-0,104-0,0193,020,468,960,2518,270,730,20,087Base metal 304H Cu 44,5 x 10 mm

CoNTiAlCuNbNiMoCrMnSiC

Mechanical properties at RT

46,5737477Filler metal Thermanit 617all weld metal GTAW

40,2706427Base metal 304H Cu 44,5 x 10 mm

Elongation [%]TS [MPa]YS [MPa]

Welding parameter: wire- 1,2 mm (mechanized welding ); 120 Amps / 12 V / v s = 15 cm/min.

Outside- Tube: 44,5 mm Outside- Tube: 44,5 mm


GTA-girth weld: DMV 310N with Ni-base filler metal Thermanit 617

Chemical composition all weld metal Thermanit 617 ( GTAW)


Chemical composition tube 310N ( 44,5 x 9,3 mm)

0,200,4621,225,61,150,360,059

NNbNiCrMnSiC

1,140,4111,155,58,921,70,100,070,063

AlTiCoNiMoCrMnSiC

46,5737477Thermanit 617all weld metal

41,6771359Tube 310N

Elongation[%]

TS[MPa]

YS[MPa]



0,200,4621,225,61,150,360,059

NNbNiCrMnSiC


46,5737477Thermanit 617 all weld metal

41,6771359Tube 310N

Elongation A 5 [%]TS [MPa]YS [MPa]

Mechanical properties of girth welds at RT (transve rse specimen)

WM715DMV 310N

LoFTS [MPa]Tube

Welding parameter: wire- 1,2 mm (mechanised welding); 120 Amps / 12 V; vs = 15 cm/min.


55,5

Ni

8,93

Mo

21,7

Cr

0,10

Mn

1,140,4111,10,070,063

AlTiCoSiC

Tube welding DMV 310N with Ni-base filler metal Thermanit 617


Filler metal: Thermanit 617

GTA-wire rod: 2,0 mm; root: 55-75 Amps / 13-14 Vfill and top layer: 55-75 Amps / 13-14 V

Welding position: PF and PC

Preheating: none

Interpass temp.:



46,5737477All weld metal Thermanit 617

LoF in BM 347H FG-626-Weld

45,2

61

Elongation A 5 [%]

773423Base metalDMV 310N*

632292Base metalDMV 347H FG*

RemarksTS [MPa]YS [MPa]

*) 38 x 6,3 mm


---0,6545,66,020,440,390,140,049Weld

11,10,411,140,0255,58,9321,750,100,070,063Filler metalThermanit 617

---0,4420,9-24,41,180,410,070Base metalDMV 310N

-

Al

Base metalDMV 347H FG

11,37

Ni

-

Mo

18,4

Cr

1,48

Mn

--0,90,410,090

CoTiNbSiC

Tube welding 347H FG / 310 Nwith Ni-base filler metal Thermanit 617



695 900Requirement

46,5737477All weld metalThermanit 617

LoF: WM723Weld

44

Elongation A 5 [%]

772377Tube 310N 51 x 4,5 mm



0,27

0,41

-

Ti

0,557,7??47,05,3522,60,370,170,059Weld

1,1411,1--55,58,921,70,100,070,063All weld metalThermanit 617

--0,200,46520,9-24,51,180,420,065Tube 310N 51 x 4,5 mm

NNiMoCrMn AlCoNbSiC

Tube welding DMV 310Nwith Ni-base filler metal Thermanit 617


Thermanit 617

Creep rupture properties of Super 304 H welds


Thermanit 617

Creep rupture properties of 310 N- welds


Creep rupture properties of 347 HFG - welds

Thermanit 617


Wurzel Wurzel PlasmageschweiPlasmageschwei ttGegenlage Gegenlage UPUP--ProzessProzessFF lllagen MAGlllagen MAG-- ProzessProzess

alloy 617; Heirisse in der WEZ



Reduzierung Reduzierung der Risse durch der Risse durch geringeren Wgeringeren W rmeeintragrmeeintrag


1

2

34

5

6

7

8

9

12

10

13

11

14

15

10 m

mRi-Nr. Rilnge

[m]1 2472 4923 3884 1525 2776 1087 1878 1509 259

10 5511 21112 12813 16314 23715 147

Breite der WEZ = 546 m



PA 7357PA 7357

UTP A6170Co mod., UTP A6170Co mod., ChgChg. 134771, . 134771, CronigonCronigon Ni10,Ni10,Biegeproben Biegeproben ber Decklage, Seitenbiegeprobe, 3a, 180ber Decklage, Seitenbiegeprobe, 3a, 180


Main influence :Pre heating temperatureInterpass temperatureHeat input

Weld built upThickness of layersBevel preperationGeometry of joint

Weld processWelding parameter

The processing of highly-developed materialsdemands most exact settings and highly-qualified staff.

alloy 230, 263, 617, 740

T23, T24

VM12-SHC

P92

Ni-Basis

Super 304 H

P23, P24

10CrMo9-10

16Mo3; 13CrMo4-5

unalloyed Steels

Welding Parameter

A good weld metal on its own does not guarantee a sound joint , if you do not carefor

Power Plant


Conclusions

- Matching filler metals for Super 304H have been develope dand qualified.

- Welding with overmatching filler metal Thermanit 617 isapproved for DMV 310N, 347H FG and Super 304H, but care h as tobe taken regarding different thermal expansion coefficients .

- Creep rupture tests of weldments are completed or running.

Tests are running up to > 30.000h.


Ongoing investigations

welding of alloys 230, 263, 617mod. and 740

developing of matching filler metals for 310N

welding of dissimilar alloys

Most important issue:

testing the creep rupture properties of the mentionedfiller metals in long term tests


Filler metal: Thermanit 304H Cu

GTA-wire rod: 2,4 mm; root: 75 Amps / 14 Vtop layer: 80 Amps / 14 V


Preheating: none

Interpass temp.:



11,59-0,411,14--53,68,922,70,360,320,063Filler MetalThermanit 617

-0,104-0,0193,020,468,960,2518,270,730,20,087Base metal304 H Cu 44,5 x 10

CoNTiAlCuNbNiMoCrMnSiC


46,5737477Filler Metal Thermanit 617all weld metal GTAW

40,2706427Base Metal304H Cu


Mechanical properties at RT girth welds (transverse specimen)

44,5 x 10 mm

LoFTS [MPa]Tube


Tube welding of 304H Cuwith Ni-base filler metal Thermanit 617


Filler metal: Thermanit 304H Cu

GTA-wire rod: 2,4 mm; root: 75 Amps / 14 Vtop layer: 80 Amps / 14 V


Preheating: none

Interpass temp.:



0,200,4621,225,61,150,360,059

NNbNiCrMnSiC


46,5737477Thermanit 617 all weld metal

41,6771359Tube 310N


Mechanical properties of girth welds at RT (transve rse specimen)

DMV 310N

LoFTS [MPa]Tube



53,6

Ni

8,9

Mo

22,7

Cr

0,36

Mn

0,461,140,4111,590,320,063

FeAlTiCoSiC

Tube welding DMV 310N with Ni-base filler metal Thermanit 617


Filler metal: Thermanit 617

GTA-wire rod: 2,0 mm; root: 55-75 Amps / 13-14 Vfill and top layer: 55-75 Amps / 13-14 V


Preheating: none

Interpass temp.:



54734433All weld metal Thermanit 617

LoF in BM 347H FG-626-Weld

45,2

61

Elongation A 5 [%]

773423Base metalDMV 310N*

632292Base metalDMV 347H FG*


*) 38 x 6,3 mm


---0,0190,0580,6545,66,020,440,390,140,049Weld

10,20,450,86-0,0010,00659,08,5220,20,0010,070,061Filler metalThermanit 617

-----0,4420,9-24,41,180,410,070Base metalDMV 310N

-

V

-

Al

Base metalDMV 347H FG

11,37

Ni

-

Mo

18,4

Cr

1,48

Mn

---0,90,410,090

CoTiCuNbSiC

Tube welding 347H FG / 310 Nwith Ni-base filler metal Thermanit 617

154967906-304hcu-310n

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