Re: [MW:17945] PQR for Welding Weldox 700

Average of 165 joules

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On 17 Jun, 2013, at 4:37 PM, J Prinsen <weldtech@online.nl> wrote:

> What were the original impact values of the base metal
>
> Jurgen Prinsen IWE
>
> ----- Oorspronkelijk bericht -----
> Van: "kannayeram gnanapandithan" <kgpandithan@gmail.com>
> Aan: "materials-welding" <materials-welding@googlegroups.com>
> Verzonden: Zondag 16 juni 2013 08:42:04
> Onderwerp: Re: [MW:17941] PQR for Welding Weldox 700
>
>
> This attachment may be usefull
>
>
>
> On Sat, Jun 15, 2013 at 7:02 PM, rudolf < rudolf.jude@gmail.com > wrote:
>
>
> Dear Community Members.
>
>
> We have done a PQR coupon for welding Weldox 700E. The material Thickness was 35 mm. Double V Groove Butt Joint. 2G position. Code AWS D1.1
>
>
> The following parameters were followed
>
>
> Process = FCAW
> Electrode wire = Esab Dual Shield II 110
> Gas = 80 % Argon 20% Co2
> Gas Flow = 20 lpm
>
>
> Preheat to 103 C
> Interpass temp around 150 C
>
>
> Current Settings
>
>
> DCEP CV
> Amps 200 amps 24 Volts for root pass
> Amps 180 to 160 24 Volts for hot, fill and capping.
>
>
> The heat input recorded was between .8 to 1.5 kj/mm
> The wire feed rate was 10 m/min
>
>
> We did a charpy test on weld metal however it failed.
> The results were average of 8 kj absorption at -40 C
>
>
> At 1mm and 5mm from fusion line the absorption was 80 to 130kj
>
>
> Intend to do a re charpy test @ -18 C.
>
>
> Though the client has not specified Charpy requirements and specifications. Wanted to do it for future requirements if any.
>
>
> Request you to please share your opinion,
>
>
> WHAT COULD BE THE REASON THE CHARPY @ WELD METAL IS SO LOW, and in the absence of specific requirements for CVN what should be the impact values.
>
>
> AWS D1.1 does not state any values for Yield strength above 355 MPA, but leaves the onus on the client to specifiy.
>
>
> Please advise.
>
>
> Thanks
> Rudolf
>
>
>
>
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>
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