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Re: [MW:7021] Re: Duplex and Super Duplex Stainless Steel

By Materials & Welding
Dear All,
 
I reviewed SFA 5.4 2007 edition and found that the minimum tensile value of E2954-15 and E2595-15 are 760 Mpa and which is less compared to ASTM 928(UNS 32750) minimum tensile value of 795 Mpa.Is there any problem for selecting E2594-15/E2595-15 for welding ASTM A 928 (UNS 32750) material?
 
I heard that the tensile value of consumable shall be equal or morethan the minimum tensile strength of the pipe /plate material.
 
 
 
Regards
 
 
Limesh



On Sun, Sep 12, 2010 at 3:45 PM, Vanchinath S.A. <vanchinaths@gmail.com> wrote:
Dear Limesh,

E2595 has 0.7 Cu and 0.7 W which is absent in E2594 and PREN is greater than 40. It has better pitting resistance compared to E2594.

regards

vanchi
On Sat, Sep 11, 2010 at 9:00 PM, limesh M <limesh78@gmail.com> wrote:
Dear All,

Proposal came from client side as ER 2594 and E 2595-15.
What is the reason for using E2595-15 instead of E 2594 on this material for SMAW?at the same time they suggested ER 2594 for GTAW !!!  I have no idea.
Expecting some valuable comments in this regard.



Regards,

Limesh

On Fri, Sep 10, 2010 at 10:58 PM, vanchi <vanchinaths@gmail.com> wrote:
Dear Limesh,
SFA 5.4 E2594 electrode for Smaw and SFA 5.9 ER 2594 filler wire for
GTAW is used for welding UNS 32750.
Impact values are not specified by the code. It depends on the
consultants requirement. Upto minus 30degC you could use rutile base
electrode -16 or -17. incase you want to go lower down to minus 50degC
one should use basic -15 electrodes. For GTAW there is no issue. It
will pass minus 50degC. impact to be taken on the weld , notch
perpendicular to direction of welding.
incase u require further information mail it vanchi@vsnl.com

On Sep 9, 1:03 pm, limesh M <limes...@gmail.com> wrote:
> Dear All,
>
> Thank you for the valuable inputs.
>
> Construction codes: ASME B31.3 and welding code ASME SEC IX
>
> I want to weld ASTM A 790(UNS 32750) to ASTM A 790(UNS32750), ASTM A
> 928(UNS32750) to ASTM 928 (ASTM32750).Then ASTM ASTM A 790(UNS 32750) to
> ASTM A 928(UNS32750).What electrode and filler wire I have to select?
> Normally at what direction impact test doing on weld metal, ie, transverse
> or longitudinal or both direction? From where I can get the minimum charpy
> value required on impact test? I have reviewed ASTM standards, found minimum
> tensile and yield strength values, but couldn't find any minimum required
> impact value.
>
> Regards,
>
> Limesh
>
>
>
> On Sun, Sep 5, 2010 at 8:29 PM, limesh M <limes...@gmail.com> wrote:
> > Dear All,
>
> > What is the difference between Duplex and super duplex stainless
> > steel?
>
> > What is the P. No for duplex and super duplex stainless steel?
>
> > One of our duplex stainless steel PQR failed in impact test.What would
> > be the reason?
>
> > Thanks and Regards,
>
> > Limesh
>
> > --
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> - Show quoted text -

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