Download - A387 to Carbon Steel

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Page 1: A387 to Carbon Steel

Shie

lded

Met

al A

rc W

eldi

ng, F

lux

Cor

ed A

rc W

eldi

ng, G

as M

etal

Arc

Wel

ding

, Gas

Tun

gste

n A

rc

Wel

ding

, Sub

mer

ged

Arc

Wel

ding

152

153

How

to s

elec

t the

pro

per w

eldi

ng c

onsu

mab

le fo

r joi

ning

dis

sim

ilar m

etal

s

The

stru

ctur

al c

ompo

nent

s of

hig

h te

mpe

ratu

re s

ervi

ce e

quip

men

t suc

h as

pow

er g

ener

atio

n bo

iler u

se

seve

ral t

ypes

of

stee

ls; t

here

fore

, joi

ning

dis

sim

ilar

stee

ls is

una

void

able

at t

he in

terfa

ce o

f diff

eren

t se

rvic

e co

nditio

n ar

eas.

Whe

n jo

inin

g ca

rbon

ste

els

and

Cr-M

o st

eels

, or w

hen

join

ing

diss

imila

r Cr-M

o st

eels

, a

fille

r m

etal

with

a c

ompo

sitio

n si

mila

r to

the

low

er-a

lloy

stee

l or

with

an

inte

rmed

iate

co

mpo

sitio

n is

com

mon

ly u

sed

for b

utt j

oint

s.

For i

nsta

nce,

car

bon

stee

l can

read

ily b

e jo

ined

to 2

.25C

r-1M

o st

eel b

y us

ing

eith

er a

car

bon

stee

l or a

1.

25C

r-0.5

Mo

stee

l fille

r m

etal

; how

ever

, car

bon

stee

l fille

r m

etal

s ar

e us

ually

sel

ecte

d ex

cept

whe

re

carb

on m

igra

tion

(the

diffu

sion

of c

arbo

n fro

m lo

wer

-Cr m

etal

to h

ighe

r-Cr m

etal

dur

ing

PWH

T an

d hi

gh

tem

pera

ture

ser

vice

) m

ust b

e de

crea

sed.

Lik

ewis

e, 2

.25C

r-1M

o st

eel c

an b

e jo

ined

to 9

Cr-1

Mo-

V-N

b st

eel b

y us

ing

a 2.

25C

r-1M

o fil

ler m

etal

.

In c

ontra

st, C

r-Mo

stee

l and

aus

teni

tic s

tain

less

ste

el a

re jo

ined

with

a h

igh

Cr-N

i sta

inle

ss (e

.g. E

309)

or,

wher

e ca

rbon

mig

ratio

n an

d th

erm

al s

tress

are

impo

rtant

fact

ors,

nic

kel a

lloy

(e.g

. EN

iCrF

e-1)

fille

r met

al.

For a

qui

ck g

uide

to re

com

men

ded

wel

ding

con

sum

able

s fo

r joi

ning

dis

sim

ilar m

etal

s, re

fer t

o Ta

ble

1.

Tabl

e 1

A qu

ick

guid

e to

reco

mm

ende

d we

ldin

g co

nsum

able

s fo

r joi

ning

dis

sim

ilar m

etal

s (1

) (2)

Bas

e m

etal

M

ild s

teel

0.5M

o 1.

25C

r-0.

5Mo

2.25

Cr-

1Mo

5Cr-

0.5M

o9C

r-1M

o9C

r-1M

o-V-

Nb

Type

304

st

ainl

ess

stee

l

NC

-39

(E30

9), N

C-3

9L (E

309L

), TG

-S30

9 (E

R30

9), T

G-S

309L

(ER

309L

)

NI-C

703D

(EN

iCrF

e-3)

, NI-C

70A

(EN

iCrF

e-1)

, TG

-S70

NC

b (E

RN

iCr-3

)

9Cr-

1Mo

9Cr-

1Mo-

V-N

b

LB-5

2(E

7016

)TG

-S50

(ER

70S-

G)

CM

-A76

(E70

16-A

1)TG

-SM

(E

R80

S-G

)

CM

-A96

(E80

16-B

2)

TG-S

1CM

(E

R80

S-G

)

CM

-A10

6(E

9016

-B3)

TG-S

2CM

(E

R90

S-G

)

CM

-5(E

8016

-B6)

TG

-S5C

M

(ER

80S-

B6)

5Cr-

0.5M

o LB

-52

(E70

16)

TG-S

50(E

R70

S-G

)

CM

-A76

(E70

16-A

1)TG

-SM

(E

R80

S-G

)

CM

-A96

(E80

16-B

2)

TG-S

1CM

(E

R80

S-G

)

CM

-A10

6(E

9016

-B3)

TG-S

2CM

(E

R90

S-G

)

2.25

Cr-

1Mo

LB-5

2(E

7016

)TG

-S50

(ER

70S-

G)

CM

-A76

(E70

16-A

1)TG

-SM

(E

R80

S-G

)

CM

-A96

(E80

16-B

2)

TG-S

1CM

(E

R80

S-G

)

1.25

Cr-

0.5M

o LB

-52

(E70

16)

TG-S

50(E

R70

S-G

)

CM

-A76

(E70

16-A

1)TG

-SM

(E

R80

S-G

)

0.5M

oLB

-52

(E70

16)

TG-S

50(E

R70

S-G

)

Not

e: (

1) T

his

tabl

e gu

ides

to

reco

mm

ende

d fil

ler

met

als

mat

chin

g th

e lo

wer-a

lloy

stee

ls in

var

ious

di

ssim

ilar m

etal

join

ts, e

xcep

ting

for T

ype

304

stee

l. O

ther

type

s of

fille

r met

als

may

be

need

ed w

here

a

spec

ific

requ

irem

ent i

s im

pose

d.

Not

e: (2

) Pre

heat

ing

and

post

wel

d he

at tr

eatm

ent f

or d

issi

mila

r Cr-M

o st

eels

sho

uld

be s

uffic

ient

to th

e hi

gher

-allo

y st

eel;

howe

ver,

the

PWH

T te

mpe

ratu

re s

houl

d be

lowe

r to

avoi

d da

mag

e to

the

lowe

r-allo

y st

eel a

nd m

inim

ize

the

carb

on m

igra

tion.

Typ

e 30

4 st

ainl

ess

stee

l sho

uld

not b

e pr

ehea

ted

or p

ostw

eld

heat

-trea

ted

to a

void

sen

sitiz

atio

n.

ForH

eat-

Resi

stan

t Low

-Allo

y St

eel