[MW:21751] Notch Toughness Properties of WPQR.

1. Check the electrode approvals and manufacturing date, manufacturing date should not be more than one year. If ok check backing/holding oven register that has been stored properly. check MTC of electrodes that confirms the impact test value requirements.
2.Check the interpass temperature measured and should not be more than 200 degree centigrade.
3. How much the heat input was measured. Should be less than 2.25 kj/mm/check the preheat temperature measured.
4. If 3.2 mm electrode was used during , should be ok.

On Thursday, August 28, 2014, tomy george <tomychalil1967@gmail.com> wrote:
> Hi,
>
> I think the reason is electrode selection. As stated above check the consumable impact test value. Recently we have tested S355 material, which we got excellent values. You may get good values with this type of electrode (Elga P62 MR )
>
> Regards,
> Tomy George
>
>
> On Wed, Aug 27, 2014 at 5:44 PM, C.Muni <cmkfc07@gmail.com> wrote:
>>
>> This grade is not suitable for the test temperature you indicated.Please check again.
>>
>> Regards,
>>
>>  Muniiandii.Ci MBA,
>> NDT Level II,
>> ISO 9001,14001 Lead Auditor,
>>
>> Mobile:99947 65591
>> Growth is the only evidence of life.
>>
>> On Tue, Aug 19, 2014 at 1:42 PM, 'CHINTUKUMAR GANDHI' via Materials & Welding <materials-welding@googlegroups.com> wrote:
>>>
>>> Dear Experts,
>>> Greetings of the day.
>>> I came to an issue in WPQR of P No. 1 Group 2 Base metal in CVN Impact testing of weld and haz. Design Code is ASME Sec. VIII Div. 1 Ed. 2013 & ASME Sec. IX Ed. 2013.
>>> Base Metal Thk. 25 mm. SA 516 Gr. 70
>>> PWHT: Normalizing at 920+/-10º C.
>>> Holding Period 65 Minutes.
>>> Welding Process SMAW (Manual)
>>> Electrode Used: 3.15 & 4.0 mm. E7018-1 (Impact tested in as welded condition).
>>> Position: 3 G Uphill (Stringer/ Weave Bead)
>>> CVN Impact test results of HAZ: 
>>> Test Temp. -57º C (Temp. reduction applicable)
>>> Specimen size: 10 x 5 x 55 mm.
>>> Values in Joules HAZ Top Side- 5, 19.5, 4 (Average 9.50)
>>> Values in Joules HAZ Bottom Side- 4.5, 4, 17.5 (Average 8.67)
>>> Values reqd. for sub size specimen: Individual min. 8 J & Min. Average 10 J.
>>> CVN Impact test results of Weld:
>>> Test Temp. -46º C (Temp. reduction applicable)
>>> Specimen size: 10 x 10 x 55 mm.
>>> Values in Joules - 9, 14.5, 8.5 (Average 10.67)
>>> Values reqd. for Std. size specimen: Individual min. 16 J & Min. Average 20 J.
>>>
>>> What shall be the reason of failure? Is electrode selection OK?
>>> Awaiting for your prompt favorable response at the earliest.
>>> Thanks & regards,
>>>
>>>
>>> C. R. GANDHI
>>>
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Thank You and Regards

 

P Govindan

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