225BHN hardness specified is for Weldment which includes weld metal, HAZ & BM. PWHT is one of the method of reducing hardness.
Other methods are Controlled cooling t8/5 which can be achieved by increasing the preheat. Preheat can be increased
just below Mf temperature and try the Hardness values.
You could try with a temper bead welding technique. There are different methods of temper bead welding technique and you can select the suitable one for your case eg a half bead technioque.
Thanks & Regards
J.Gerald Jayakumar
0091-9344954677
From: Ramchandra vichare <vicharerke@indiatimes.com>
To: materials-welding@googlegroups.com
Cc: pgoswami <pgoswami@quickclic.net>
Sent: Friday, April 13, 2012 2:43 PM
Subject: [SUSPECTED SPAM] Re: [MW:14106] Hardness value without PWHT
----- Original Message -----
Dear friend,
First of all pl confirm which welding procedure you used (i.e.GTAW+SMAW),or any one?
See if you use welding technique GTAW by ER80SB2 + SMAW by E8018B2 hardness value will may be in controll.
Pl try & revert.
Regards,
RK Vichare
From: pradip kumar sil <pradipsil@gmail.com>
To: materials-welding@googlegroups.com
Cc: pgoswami <pgoswami@quickclic.net>
Sent: Thu, 12 Apr 2012 10:50:16 +0530 (IST)
Subject: [MW:14104] Hardness value without PWHT
Dear experts,
I have faced regarding hardness issue on ASTM A 335 GR P-11 material.
Pipe thickness is 7.5mm. Without PWHT hardness is coming around 275
to 289 BHN on weld zone & 250 260 BHN on HAZ zone & parent material
hardness is 197 to 204 BHN. Due to inside refractory material PWHT is
not possible.
My question is as per ASME B-31.3/ ASME SEC II PART A hardness value
of this material is 225 BHN ( MAX). There is any specification for
weld zone / HAZ zone hardness value.
Can anybody give an idea to reduce the hardness without PWHT if it is
not acceptable limit.
Thanx in advance.
Regards
Pradip
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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.
--
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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.
0091-9344954677
From: Ramchandra vichare <vicharerke@indiatimes.com>
To: materials-welding@googlegroups.com
Cc: pgoswami <pgoswami@quickclic.net>
Sent: Friday, April 13, 2012 2:43 PM
Subject: [SUSPECTED SPAM] Re: [MW:14106] Hardness value without PWHT
----- Original Message -----
Dear friend,
First of all pl confirm which welding procedure you used (i.e.GTAW+SMAW),or any one?
See if you use welding technique GTAW by ER80SB2 + SMAW by E8018B2 hardness value will may be in controll.
Pl try & revert.
Regards,
RK Vichare
From: pradip kumar sil <pradipsil@gmail.com>
To: materials-welding@googlegroups.com
Cc: pgoswami <pgoswami@quickclic.net>
Sent: Thu, 12 Apr 2012 10:50:16 +0530 (IST)
Subject: [MW:14104] Hardness value without PWHT
Dear experts,
I have faced regarding hardness issue on ASTM A 335 GR P-11 material.
Pipe thickness is 7.5mm. Without PWHT hardness is coming around 275
to 289 BHN on weld zone & 250 260 BHN on HAZ zone & parent material
hardness is 197 to 204 BHN. Due to inside refractory material PWHT is
not possible.
My question is as per ASME B-31.3/ ASME SEC II PART A hardness value
of this material is 225 BHN ( MAX). There is any specification for
weld zone / HAZ zone hardness value.
Can anybody give an idea to reduce the hardness without PWHT if it is
not acceptable limit.
Thanx in advance.
Regards
Pradip
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
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 post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
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.
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