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7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
1/11ogos, namny unauth
A produEnginee
s used within thirized use is illega
i
t ofing Pulse Li
document are cl and strictly pro
ow
nd
err
n st
el
ited, UK
pyrighted by Enibited.
to
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ainl
s
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ify
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te l
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7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
2/11ogos, namny unauth
2 |P a g
A produEnginee
s used within thirized use is illega
Ferrite co
stainless
set the li
Therefor
available
as a num
This docu
and to pr
weld join
predictin
dealing
t ofing Pulse Li
document are cl and strictly pro
ntent plays
teels weld j
itations of f
, ferrite con
and then act
er and the c
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s is out of sc
that for a c
ith welding
ited, UK
pyrighted by Enibited.
How t
n important
int. When st
errite conten
ent is usuall
ual value is
ommon ter
help you in s
ber using
ope of this d
rtain weldin
f stainless st
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role in deter
ainless steel
t in order to
specified fo
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nd predict
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ferrite n
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s Ferrite Nu
for the wel
ually weld.
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ould provide
s
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mber
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job, predict
. Ferrite cont
ber (FN).
ing job you
easuring ac
g ferrite nu
you a comp
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rformance o
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7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
3/11ogos, namny unauth
3 |P a g
A produEnginee
s used within thirized use is illega
Ferrit
Ferrite
(includ
suscep
Ferrite
have t
benefi
t ofing Pulse Li
document are cl and strictly pro
e Num
number is t
ing toughn
tibility to ho
number nee
eir own adv
ial and still i
ited, UK
pyrighted by Enibited.
How t
er
he content
ss etc.),
cracking.
ds to be spec
ntages and
other cases
Magneticproperties
Fig. 1 Re
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specify a
f ferrite in
agnetic an
ified conside
isadvantag
a higher nu
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2013
nd predict
stainless st
d corrosion
ring the serv
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FN
Mechanicalproperties
Hotcracking
duringwelding
of properties
ferrite n
eel weld an
resisting
ice requirem
certain cas
linked with
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s, a low ferri
orrosionesistance
errite Numb
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he mechani
long with
high values
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7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
4/11ogos, namny unauth
4 |P a g
A produEnginee
s used within thirized use is illega
What i
Chro
What
Nickel
Equiv
While
equiva
Cr(eq)
Ni(eq)
t ofing Pulse Li
document are cl and strictly pro
ncreases fer
ium, Molyb
ecreases fe
, Carbon, Nit
lent)
Fig.
predicting f
lents are de
= Cr + Mo +
= Ni + 35 C +
ited, UK
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ite?
enum, Niobi
rite?
rogen, Copp
2Effect on f
rrite using t
ined as:
.7 Nb
0.25 Cu
ineering Pulse
specify a
um (known
r austenizi
rrite numbe
e most com
Fig. 3 W
Chromi
2013
nd predict
ollectively a
ng elements
with varyin
monly used
C 1992 Diag
um Equivale
ickel Equival
ferrite n
Chromium
(known coll
Cr and Ni e
RC 1992 di
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ent decreasi
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ctively as Ni
uivalent
agram, Chro
up
g FN
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kel
mium & Nic
weldpulse.cringpulse.c
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7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
5/11ogos, namny unauth
5 |P a g
A produEnginee
s used within thirized use is illega
PreTake t
comp
WeldP
1. Sele
2. Clic
t ofing Pulse Li
document are cl and strictly pro
icting f
he mill test
sitions as re
ulse helps y
ct the weldin
Ferrite Nu
ited, UK
pyrighted by Enibited.
How t
errite in
certificate o
uired by WR
u in doing th
g calculation
ber Check
ineering Pulse
specify a
weldin
the weldin
C 1992 diag
is as illustrat
s module
2013
nd predict
consu
consumabl
am to predic
ed below:
ferrite n
ables
and note
t ferrite num
Sales: s
mber
own the req
ber.
Info: weldles@engine
uired chemi
weldpulse.cringpulse.c
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7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
6/11ogos, namny unauth
6 |P a g
A produEnginee
s used within thirized use is illega
3. Sele
4. Inpu
Please
major
decisio
from F
WeldP
t ofing Pulse Li
document are cl and strictly pro
t Welding
t the chemic
note that a
impact on t
n. Predicted
N 1-100. We
lse Predict
ited, UK
pyrighted by Enibited.
How t
onsumable
l compositi
y minor cha
he predicte
ferrite num
will now in
errite modul
ineering Pulse
specify a
from the C
n as listed in
nge in chem
ferrite nu
er is as per
ut the che
e to see the
2013
nd predict
eck For: co
mill test cer
ical composi
ber. Please
WRC 1992
ical compos
redicted fer
ferrite n
mbo box
ificate for th
tion of the
check your
iagram whi
ition of one
rite number.
Sales: s
mber
e welding co
lements list
inputs bef
h allows fer
stainless ste
Info: weldles@engine
sumable
d may have
re taking a
rite predicti
el bare wire
weldpulse.cringpulse.c
a
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n
in
7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
7/11ogos, namny unauth
7 |P a g
A produEnginee
s used within thirized use is illega
This fe
this co
weldin
t ofing Pulse Li
document are cl and strictly pro
rrite number
nsumable, a
g. Those fac
ited, UK
pyrighted by Enibited.
How t
is only the r
tual ferrite c
ors are discu
ineering Pulse
specify a
presentatio
heck is subje
ssed next.
2013
nd predict
of welding
cted to chan
ferrite n
onsumable
ge based up
Sales: s
mber
owever whi
n certain fac
Info: weldles@engine
le welding wi
tors during t
weldpulse.cringpulse.c
th
he
7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
8/11ogos, namny unauth
8 |P a g
A produEnginee
s used within thirized use is illega
Effe
Flux- Red
Nitro
Oxid
t ofing Pulse Li
document are cl and strictly pro
ct on fe
ored arc weluction in wir
gen and dec
Oxidation
N
tion
High heatinput
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pyrighted by Enibited.
How t
rritenu
ding (FCAW)speed incre
eases FN
F
itrogen
Arc length
ineering Pulse
specify a
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ases
Arc length
linked withNitrogen)
Hi
N
Nitroge
O
2013
nd predict
e to dif
gh heatinput
n
Loss ofshieldi
sh
xidation
Nitroge
ferrite n
erent
-
-
f
-
f
-
i
gasng
arbon (ifCO2 as
ielding gas)
F
n
Arc l(linke
nitro
Sales: s
mber
elding
hielded met
Nitrogen ing
N
Oxidation re
errite numbe
High heat in
errite level
Arc length al
gress in the
GTAW /G
- Loss of ga
nitrogen in
- Carbon g
number if
ngthwith
gen) Rewi
(linni
Info: weldles@engine
l arc weldin
ress from air
duces Chro
r
ut results in
lows more n
weld
AW
s shielding r
gress from ai
in decreasin
O2 is a shiel
uction inre speedked withtrogen)
High heainput
weldpulse.cringpulse.c
(SMAW)
reduces
ium and
low
itrogen
sult in
r
g ferrite
ding gas
t
7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
9/11ogos, namny unauth
9 |P a g
A produEnginee
s used within thirized use is illega
In addi
have a
coolin
Da
Oxid
t ofing Pulse Li
document are cl and strictly pro
tion to all th
n effect on f
increases f
ages a
ation
Nitrogen
ited, UK
pyrighted by Enibited.
How t
factors disc
rrite numbe
rrite numbe
sociate
F
Arc length
Hig
Lowat hig
Lesscor
Low
low
ineering Pulse
specify a
ussed above
. Dilution is
.
d withf
Loss of flux
FN
creep ruptureh temperatur
resistance torosive media
toughness at
temperature
2013
nd predict
weld dilutio
ifferent wit
errite c
Fluxcomposition
Heat i
e
Lo
Sus
C
pros
ferrite n
Su
- L
in
- F
fe
n obviously
different w
ntent
nput
FN
eptibility to hcracking
ompromisedmechanicalerties in Duplainless steels
Sales: s
mber
bmerged Ar
oss of flux re
ress from ai
lux composit
rite number
nd the weld
lding proces
ot
ex
Info: weldles@engine
Welding (S
ult in nitrog
ion can chan
cooling rates
ses. Rapid
weldpulse.cringpulse.c
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ge the
7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
10/11ogos, namny unauth
10 |P a
A produEnginee
s used within thirized use is illega
Rec
Full
For co
For he
For cr
e
t ofing Pulse Li
document are cl and strictly pro
ommen
y auste
rrosive servi
at resisting
ogenic appli
.5
3.0 -
.0 -
.0 -
30 -
ited, UK
pyrighted by Enibited.
How t
ed ferr
itic typi
es: C: 0.03;
eld metals:
cations: C: 0.
ax.
8.0
2.0
5.0
70
ineering Pulse
specify a
ite rang
cal che
n: 4.5; Cr: 2
: 0.12; Mn:
03; Mn: 4.5;
Severe corr
Heat resisti
Cryogenic a
High temp
High temp
High temp
For duplex
2013
nd predict
es
ical c
; Ni: 22; Mo:
; Cr: 25; Ni: 2
r: 17; Ni: 16;
osion (like in Ure
ng weld metals li
pplications belo
rature applicatio
rature applicatio
rature applicatio
stainless steels
ferrite n
mpositi
2; N: 0.15
0.5
Mo: 2.5
Plants)
e SS310
-105 C
s up to 700 C
up to 350 C
up to 400 C
Sales: s
mber
on
Info: weldles@engine
weldpulse.cringpulse.c
7/22/2019 How to Specify and Predict Ferrite Number in Stainless Steel Welds
11/11
11 |P a
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Pre
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Ferrit
when
Therejoint.
infor
deepe
e
t ofing Pulse Li
icting
l words
number pl
service is c
ore, it is imeldPulse
ation befor
r when deali
ited, UK
How t
errite n
ys an impor
rrosive, inv
ortant to tarovides a si
taking a w
g with stainl
specify a
mber
tant role in
lves exposu
e into accople and eas
elding decisi
ess steels, th
nd predict
f a wel
he perform
re to high
nt the facto-to-use mo
on. The pur
e most com
ferrite n
metal
nce of a st
emperature
rs defining tule of Predi
pose is to e
only used
Sales: s
mber
inless steel
or very low
he ferrite nut Ferrite to
nable engin
aterial in pe
Info: weldles@engine
eld especi
temperatur
mber of a wet some use
ers dig a lit
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lly
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ldful
tle
.