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Re: [MW:25633] Hardness for vessel after PWHT

By Materials & Welding
Dear All,

Many thanks for your valuable feed backs. Also regret for the late response.

Regarding the above, there was a mis-understanding that is in fact HAZ
& base metal hardness was restricted to 225 HB while weld metal was at
236 HB. since one party raised this assuming 225 HB is applicable for
all. Anyhow, all are within limit and hence OK.

The testing was done with portable machine (MIC 10).

I have one more query, when & where Brinell & vickers applicable specifically.

Thanks in advance,
Kumar.

On 10/30/16, Perumal Govindan <perumalgovindan@gmail.com> wrote:
> Dear Kumar,
>
> Please provide your hardness test report for further review or find below
> snap shot for your reference.
>
> [image: Inline image 1]
>
> [image: Inline image 2]
>
> Regards
> Govindan
>
>
> On Fri, Oct 28, 2016 at 11:15 PM, Kumar <sk7920541@gmail.com> wrote:
>
>> Dear experts,
>> In our project for pressure vessels, moc- SA 516 gr.70 N, shell thickness
>> 55mm (nace MR 0175). After doing PWHT, hardness measured and most of
>> readings found in limit.
>> According to procedure vessels having more than 50mm thick hardness value
>> shall not exceed more than 225 (brinell for p no. 1). But some values are
>> 228,230,18 etc.. could we get expert advise to adress this dis-parity pl.
>> Thanks in advance,
>> Kumar.
>>
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