As already mentioned in other topics both filler metals are cellulosic
types in which E6010 is normally used for root layers only whereas
E7010-P1 is used for fill layers and cap layers. What is important
when testing welds executed with cellulosic filler metals is the time
between welding and testing. This because of the H2 dissolved in weld
metal needs time to diffuse from the weld metal, approximately 48
hours, in order to avoid so called fish eyes during tensile testing
and/or bend tests because this will lower materials mechanical
properties especially elongation. For this reason you always have to
execute a post weld heat treatment of 4 hours at 250 °C in order to
ensure all H2 is diffused in front of mechanical testing. Did you
execute this on your test welds?
I assume you mean specimen size 10 x 5 x 55 mm for Charpy-V impact
test, test temperature depends on your project requirements and should
be similar to the temperature for standard 10 x 10 x 55 mm specimens.
According to filler metal manufacturer (Böhler Welding) these filler
metals have guaranteed impact values up to -40 °C.
Best Regards,
Herman Pieper
On Jan 16, 8:52 am, eldhois...@rediffmail.com wrote:
> Dear All,
>
> Presently we have conducted a Destructive test-(All Weld Tensile Test) for a E6010 and E7010 electrode,in which the Elongation Value is 20.2 %and 20%, whereas the required value as per the specification is 22%.Kindly please tell me if this can be acceptable or any consideration can be given to this test value ?
> Also kindly please tell me for carrying out Charpy V Impact Test for 10mm X 5mm X15 mm ,Specimen for X65 Grade material Pipe welded with E6010 and E7010-P1 what is the temperature it has to be tested.?
> Kindly give your suggestions at your earliest..
> Regards,
> Eldho Isaac,Inspection Engineer.
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