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More options Apr 1, 11:49am
From: GANESH GANESH Date: Thu, 1 Apr 2010 21:19:19 +0530
(IST)Local: Thurs, Apr 1 2010 11:49am Subject: lateral
expansionForward | Print | Individual message | Show original |
Report this message | Find messages by this author Friends,
One of our Pqr is failed twice, material stainless stell 316l
grade , welded gtaw and smaw. Testing failed in lateral expansion .
pls suggest a procedure for achieving the lateral expansion.(coupon
thickness 25 mm) Ganesh Your Mail works best with the New Yahoo
Optimized IE8. Get it NOW!
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Discussion subject changed to "4664] lateral expansion" by
pgoswami
pgoswami View profile Translate to Translated (View Original) Hi
Mr. Ganesh, Sec-VIII, DIV-1, UHA 51, elaborates impact test
requirements for austenitic S.S base metal, weld metal and HAZ.
Typically as per UHA-51(a) (4) For 316L weld metals:- : * each heat
of filler metal used in production shall have a Ferrite Number 5 FN
max, as measured by a ferritescope or magna gauge, which shall be
calibrated in accordance with AWS A4.2, or as determined by
applying the chemical composition from the test weld. * notch
toughness testing of the base metal, weld metal, and heat affected
zone (HAZ) shall be conducted using a test temperature of 320F
(196C); and each of the three specimens from each test set shall
have a lateral expansion opposite the notch not less than 0.021 in.
(0.53 mm). What was the impact test temperature adopted in PQR
qualification? From my past experience in fabrication of cryogenic
tank and other equipments, I could provide the following
guidelines:- * Get the base metal impact tested at the mill at the
design temperature or less. Mills could guarantee impact in
304/304L and 316L S.S down up to 320F (196C); * Similar guidelines
should apply for welding consumables also. * Insist on Ferrite 5 FN
max for 316L S.S. and consistent impact test results at 320F
(196C); * Should you have problem with 316L S.S. consumables, may
think about a switch to 308L S.S, with a MAX 2.FN. 308L electrodes
usually have better impact properties than 316L S.S electrodes. *
Adopt the conventional precautions required for welding austenitic
S.S. * If you still face problems, check back with the
manufacturers on oxygen content in the weld metal. However hope
this issue should not be major, as S.S weld metals contain enough
de-oxidizers (Cr) to produce a very clean weld metal. Let me know
if it helps. Thanks. Pradip Goswami,P.Eng. Welding &
Metallurgical Engineer/Specialist Component Integrity Section.
Engineering and Training Services Ontario Power Generation Inc.
Res:-88,Garth Trails Crescent Hamilton,Ontario, L9B2X1,Canada
[email protected] [email protected]
Tel-905-679-9677 -----Original Message----- From:
[email protected]
[mailto:[email protected]] On Behalf Of GANESH
GANESH Sent: Thursday, April 01, 2010 11:49 AM To:
[email protected] Subject: [MW:4664] lateral
expansion Friends, One of our Pqr is failed twice, material
stainless stell 316l grade , welded gtaw and smaw. Testing failed
in lateral expansion . pls suggest a procedure for achieving the
lateral expansion.(coupon thickness 25 mm) Ganesh Your Mail works
best with the New Yahoo Optimized IE8. Get it NOW!
http://downloads.yahoo.com/in/internetexplorer/ -- To post to this
group, send email to [email protected] To
unsubscribe from this group, send email to
[email protected] For more options,
visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel
views and meant for educational purposes only, Users must take
their own decisions w.r.t. applicable code/standard/contract
documents. To unsubscribe, reply using "remove me" as the subject.
Kobelco-NC38LT.pdf115K Download - Hide quoted text -- Show quoted
text -
More options Apr 2, 12:38am
From: "pgoswami" Date: Fri, 2 Apr 2010 00:38:09 -0400Local: Fri,
Apr 2 2010 12:38am Subject: RE: 4664] lateral expansionForward |
Print | Individual message | Show original | Report this message |
Find messages by this author Hi Mr. Ganesh, Sec-VIII, DIV-1, UHA
51, elaborates impact test requirements for austenitic S.S base
metal, weld metal and HAZ. Typically as per UHA-51(a) (4) For 316L
weld metals:- each heat of filler metal used in production shall
have a Ferrite Number 5 FN max, as measured by a ferritescope or
magna gauge, which shall be calibrated in accordance with AWS A4.2,
or as determined by applying the chemical composition from the test
weld. notch toughness testing of the base metal, weld metal, and
heat affected zone (HAZ) shall be conducted using a test
temperature of 320F (196C); and each of the three specimens from
each test set shall have a lateral expansion opposite the notch not
less than 0.021 in. (0.53 mm). What was the impact test temperature
adopted in PQR qualification? From my past experience in
fabrication of cryogenic tank and other equipments, I could provide
the following guidelines:- Get the base metal impact tested at the
mill at the design temperature or less. Mills could guarantee
impact in 304/304L and 316L S.S down up to 320F (196C); Similar
guidelines should apply for welding consumables also. Insist on
Ferrite 5 FN max for 316L S.S. and consistent impact test results
at 320F (196C); Should you have problem with 316L S.S. consumables,
may think about a switch to 308L S.S, with a MAX 2.FN. 308L
electrodes usually have better impact properties than 316L S.S
electrodes. Adopt the conventional precautions required for welding
austenitic S.S. If you still face problems, check back with the
manufacturers on oxygen content in the weld metal. However hope
this issue should not be major, as S.S weld metals contain enough
de-oxidizers (Cr) to produce a very clean weld metal. Let me know
if it helps. Thanks. Pradip Goswami, P.Eng. Welding &
Metallurgical Engineer/Specialist Ontario Power Generation Inc.
[email protected],[email protected]
- Hide quoted text -- Show quoted text -
-----Original Message----- From:
[email protected]
[mailto:[email protected]] On Behalf Of GANESH
GANESH Sent: Thursday, April 01, 2010 11:49 AM To:
[email protected] Subject: [MW:4664] lateral
expansion
Friends, One of our Pqr is failed twice, material stainless
stell 316l grade , welded gtaw and smaw. Testing failed in lateral
expansion . pls suggest a procedure for achieving the lateral
expansion.(coupon thickness 25 mm) Ganesh Your Mail works best with
the New Yahoo Optimized IE8. Get it NOW!
http://downloads.yahoo.com/in/internetexplorer/ -- To post to this
group, send email to [email protected] To
unsubscribe from this group, send email to
[email protected] For more options,
visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel
views and meant for educational purposes only, Users must take
their own decisions w.r.t. applicable code/standard/contract
documents. To unsubscribe, reply using "remove me" as the
subject.
Kobelco-NC38LT.pdf115K Download
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