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Re: Fw: [MW:16301] Impact Test clarification

By Materials & Welding
Mr. Asish,

What exactly differs consumables of impact test @-29 to -46 to normal
electrodes.
Whu is is designated like this ?
only beacause of Flux or prices..

a.    Factors contributing to lower temp. are (1) minimum carbon, (2) deoxidation or through killing (3)  fine grain size,
       (4) normalising   or quenching & tempering (5) alloying with nickel (6) addition of Manganese etc. 

       Among them last 2 factors are most effective. This combined with low impurity level will provide impact at -29 to
      100 deg.C..Addition of Ni will help beyond -46 deg. C. This requirement is storage levels like,

       LPG                    20   Deg. C under pressure
       Ammonia        -   30      "                 "
       Propane          -   42      "                 "
       LNG                - 162      "                 "
       Oxygen           - 183      "                 "    and like wise.

What Its (FLUX ncontains ) exactly in Impact test @-29 to -46 welding consumables?hin or Wire in case ofg electrodes..
pls , explain in brief.

a.    Apart from basic (low Hyd.) type flux,  Mn, Ni, and other alloy elements are added through ferrous form i.e.,
       ferro Mn, ferro Ni etc. It is same with filler wires where alloys are added directly .

Sridhar.
From: Ashish Pathrabe <darkash6633@gmail.com>
To: sridhar305@yahoo.com
Sent: Tuesday, 18 December 2012 11:57 AM
Subject: Re: Fw: [MW:15201] Impact Test clarification

Dear Shridhar Sir,

What exactly differs consumables of impact test @-29 to -46 to normal
electrodes.
Whu is is designated like this ?
only beacause of Flux or prices..

What Its (FLUX contains ) exactly in Impact test @-29 to -46 welding
consumables?
or Wire in case of electrodes..
pls , explain in brief.

With regards,
Ashish P

On Thu, Sep 6, 2012 at 9:24 AM, Ashish Pathrabe <darkash6633@gmail.com> wrote:
> Dear Shridhar,
> Query on folllwoing points as mentioned (As per your last mail on ) :-
>
> 1) If 7018-1 is consumables used for WCB & LCB (castinf Form) & is meeting
> the impact values at -46 deg C.
> a) What will the Consumables shall be used for Single V BuTT joint of 2
> pieces to be joined for WC6 to WC6 , WC9to WC9 & CF3 to CF3 base Materials?
>
> b) Any Special Consumables are used to meet Impact test Values of -29 & -46
> Deg C of Above materials as mentioned?
>
> Please , reply to my quireies.
>
> With Regards,
> ASHISH
>
> Agree with what others have said But, before proceeding with another coupon
> plate welding, please check out,
> 1. whether the consumables you are using/have used, shall meet the impact
>    values at -46 deg C. If not the entire exercise will  become futile.
> 2. Whether the base metal selected earlier  could meet the said impact norms
> , if not it may
>      not be required to do -46 deg. C  impact for consumables used.
> 3. ASME sec IX does not ask for hardness  as  such. If you have done
> hardness test for
>    your jobs, you could be following ISO 15614-1 or any equivalent code,
> then you may
>    require impact  for base metal, HAZ apart from the weld zone.
> 4. Pl. check up before proceeding further.
>
> On Mon, Sep 3, 2012 at 6:55 PM, c sridhar <sridhar305@yahoo.com> wrote:
>>
>> Mr. Mubean,
>>
>> Agree with what others have said But, before proceeding with another
>> coupon plate welding, please check out,
>>
>> 1. whether the consumables you are using/have used, shall meet the impact
>>    values at -46 deg C. If not the entire exercise will  become futile.
>> 2. Whether the base metal selected earlier  could meet the said impact
>> norms , if not it may
>>      not be required to do -46 deg. C  impact for consumables used.
>> 3. ASME sec IX does not ask for hardness  as  such. If you have done
>> hardness test for
>>    your jobs, you could be following ISO 15614-1 or any equivalent code,
>> then you may
>>    require impact  for base metal, HAZ apart from the weld zone.
>> 4. Pl. check up before proceeding further.
>>
>> sridhar.
>>
>> ----------------------------------------------------------------------------------------------------------------------------
>>
>>
>> Dear experts,
>>
>> Please help out to clear my doubt.
>>
>> I have qualified a WPS/PQR with impact -29 deg C, now customer want the
>> WPS/PQR shall be qualified with impact in -46 deg C. Also there is no
>> remaining coupon piece available for impact testing with -46 deg C.
>>
>> My question here is, should I weld a coupon and only do impact test as
>> required by customer and attached to PQR will be sort out this issue.?
>> or
>> Should I REDO a PQR with all mechanical  test which includes Tensile,
>> Hardness, Bend along with impact will sort our this issue.?
>>
>>
>> Requesting you to please provide me ASME IX clause reference.
>>
>>
>> Anticipating for you kind help.
>>
>> Thanks & Regards.
>> M.K.Mubeen
>> --
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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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>> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>>
>> 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/
>>
>> http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
>>
>> 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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