Thursday, July 23, 2009

[MW:2786] Re: element reqd. for NACE

First of all ascertain applicability of MR0175.
If yes,all carbon and loy alloy steels are acceptable at 22HRC max hardness provided they (1) contain less than 1% nickel(2)are used in one of the following heat treated conditions:
(a)hot rolled(carbon steels only)
(b)annealed
(c)normalized
(d)normalized and tempered
(e)normalized,austenitized,quenched and tempered or
(f) austnitized,quenched and tempered.
Hardness is the principal creterion.After welding also near HAZ chances are there for more hardness so invariably Stress Relief(PWHT) treatment is advisable for NACE application.
As far as SS is concerned,it shall contain atleast these elements in range;C-.08 max,Cr-16% min,Ni-8% min,P-0.045 max,s-.04 max,Mn-2% max, and Si-2% max.
Please note that effect of Ni is different in Pearlitic steels(CS) and in austenitic Stainless Steels
Regards
Aarpee

On Wed, Jul 22, 2009 at 4:35 PM, Jivan Dhamane <jivanadhamane@yahoo.co.in> wrote:
Dear PSP

Check it out sulphur content in the material it shd not more than 0.013 for pipe fittings and not more than 0.012 for pipes.

regards

jivan

--- On Wed, 22/7/09, Yadav Shiva <luvshiv2002@gmail.com> wrote:

From: Yadav Shiva <luvshiv2002@gmail.com>
Subject: [MW:2775] Re: element reqd. for NACE
To: materials-welding@googlegroups.com
Date: Wednesday, 22 July, 2009, 12:48 PM


Hi Prashant,
                  Check the Chemical Properties, Mainly the Cromium %
and carbon content.

On 7/22/09, prashant pansare <prashantpan_99@yahoo.co.in> wrote:
> Yes,but which element affects the ordinary material to gain the requirements
> of MR0175.
>
>
> --- On Wed, 22/7/09, Yadav Shiva <luvshiv2002@gmail.com> wrote:
>
>
> From: Yadav Shiva <luvshiv2002@gmail.com>
> Subject: [MW:2771] Re: element reqd. for NACE
> To: materials-welding@googlegroups.com
> Date: Wednesday, 22 July, 2009, 12:13 PM
>
>
>
> Dear prashant ,
>                            please describe what is your requirement
> clearly....  But from my understanding the CS/SS Material should meet
> the NACE Specification MR0175.
> Which service you need?
> On 7/22/09, prashant pansare <prashantpan_99@yahoo.co.in> wrote:
>> Dear all,
>> pl. explain which  element makes the ordinary CS/SS to CS/SS NACE & how?
>> psp
>>
>>
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>
>
>
>
>
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>

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