while welding there is a change for loss of titanium, that is why they generaly recommend for Niobium/Columbium based welding consumables
kgp
On Mon, Oct 18, 2010 at 3:37 PM, govindasamy neethipathi <neethipathi@gmail.com> wrote:
--Dear Arun kumar,ER 347 can be used to weld SS321H and re qualification is not required if already qualified for P8.Chemical Composition
Represented by ASTM A240 and ASME SA-240 specifications.
Element Weight Percentage Maximum
Unless Range is Specified321 347 Carbon* 0.08 0.08 Manganese 2.00 2.00 Phosphorus 0.045 0.045 Sulfur 0.030 0.03 Silicon 0.75 0.75 Chromium 17.00-19.00 17.00-19.00 Nickel 9.00-12.00 9.00-13.00 Columbium +
Tantalum**-- 10xC min to 1.00 max Tantalum -- -- Titanium** 5x(C+N) min to 0.70 max -- Cobalt -- -- Nitrogen 0.10 -- Iron Balance Balance *Also H grade with Carbon 0.04 – 0.10%.
**H grade minimum stabilizer is different formula.
On Sun, Oct 17, 2010 at 4:34 PM, Vanchinath S.A. <vanchinaths@gmail.com> wrote:
no need to requalifyvanchiOn Sun, Oct 17, 2010 at 12:43 PM, ARUN KUMAR <arunku72@hotmail.com> wrote:
Dear All,--
I need your valuable advice on following.
I need to carry out the welding of A312 Gr. TP321 H ( GTAW process) with a WPS qualified for P8- P8 material. In the WPS it is mentioned that to use ER 347 H for welding A312 Gr.TP321 H.
In ASME, section II, there is no F no classification for ER 347 H ( other filler ER308 H & ER316 H are classified in 5.9)
The filler wire is supplied by ESAB and theire Material cert is showing only ER 347 ( SFA 5.9) with carbon % .04 ( As per section II ,Carbon % for ER 347 is max .08%)
Since there is difference in C %, do I need to requalify the WPS using the above filler ( ER 347 with C % .04)?
Thanks and regards,
Arun
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