Re: [MW:19399] Solution annealing /Physical Properties of Duplex Material.(Urgent)

Dear Experts,

 

Can anybody help me out for solution annealing heating cycle, shocking time (thickness 3.4 mm) procedure pipe fittings of Duplex materials like USN 31303, UNS 32750, UNS 32205, it is not clearly mentioned as per the applicable ASTM / ASME Codes.

 

And similarly we are facing problem of carbon steel pipe fittings at the time of Normalizing at 910 Deg. C the big diameters and 14 mm thk. materials after the Normalizing process the fittings like elbow shapes are collapsing the diameter and diameter shape changing drastically.

 

In view of anybody can help me out for the Normalizing procedure for heating cycle & shocking time to eliminate this frequent problems.    

 

D.Dattatreya

          

On Wednesday, January 9, 2013 3:49 PM, Ashish Pathrabe <darkash6633@gmail.com> wrote:

Dear Amit,

 

Technically Virtuous :- I would Vote for:-

 

ON CASE B:-

Forging and solution annealing Will bring back the required Physical properties of the Metal (fulfill the Reduction an area) as required by the STD SA182Gr.F51

With Regards,

Ashish Pathrabe

On Tue, Jan 8, 2013 at 12:36 PM, Amit Udavant <amitudavant@gmail.com> wrote:

Dear Experts

This is with reference to the Duplex Samples tested at Elca Lab on 05/01/2013, witnessed by TPI.Kindly refer the Lab test report attached herewith.

We would like to draw your attention on the following:-

CASE A:

1) Sample no TP 01/Elca No:SC4517 Satisfies the all the test requirement (Chemical , physical) as per SA790 UNS32205 .

2) Sample no TP 02/Elca No:SC4518 Is drawn for the same lot as above mentioned sample No.TP01 ie The 25 NB Pipe was Drawn or cold-worked  to achieve the size of 20 NB.On testing the same, the Sample failed  in Elongation where as  increase in the  Yield Stress and U.T.S was observed.

we believe that the reduction in the elongation property must have been the effect of hardening due to cold working.

Can the Solution Annealing of pipe after drawing, bring back the required Physical property i.e. Elongation of the Metal (required is 25% Min),as it had shown in sample test for  TP01/Elca No:SC4517.(Will the increase in elongation possible after  Solution Annealing of the drawn Pipes?)

CASE B:

1) Sample no S 8015/Elca No:SC4520, 75Dia Bar, Satisfies the all the test requirement (Chemical , physical) as per SA182 Gr. F51.

2) Sample no S 8405/Elca No:SC4519, 110 Dia Bar satisfies all the requirements as per SA182Gr.F51 Except Reduction in Area.The Required Reduction in Area as per Grade is 45% at least and we have achieved  39.76%.

These Bar is raw material for the Forged Fittings and The Flanges therefore these bars will be undergoing the forging  and Solution Annealing later on (Before Final machining.)

Can forging and solution annealing later on bring back the required Physical properties of the Metal (fulfill the Reduction an area) as required by the STD SA182Gr.F51

We request you to kindly look in to the matter and guide us in deciding whether  to go ahead with the material or  not. as the material is  very scarcely available in the market we are left out with very lesser options.

In case of any query you ma call the undersigned.

Yours Faithfully

AMIT 9833859030

Yours faithfully,
Best Regards
Arvind G. Udavant
AMIT ENGINEERING WORKS
W-103 (A) KHARVAI M.I.DC.,
BADLAPUR (EAST) - 421 503,
DIST: THANE, MAHARASHTRA
+91 251 2698680/2691391

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Warm Regards
amit --
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