FW: [MW:5267] group of SA517

Dear Ali,

SA- 517 is a high strength quenched and tempered steel, which comes in 6 grades, Grade A, B, E, F, J, P. You may find all the details in ASME Sec-II, Part-A.

Coming back to this steel, it is :-

· Quenched—to refine the grain, to enhance the UTS. Talk about any alloying element, Cr, Mo, Ti, V, Bo Nb/Cb, you'll have in this steel. This steel have very little ductility in as quenched condition

· Tempering – to enhance the ductility(% El), to enhance the notch toughness, reduce the hardness.

A combination of both the above heat treatments provides a balanced mechanical properties in this steel. This answers point1 of your query.

ASME Sec VIII, DIV-1,UCS-66, does not deal with this steel, UCS chapter is for carbon and low alloy steel only .

SA-517 is covered in great details under UHT. There is no exemption for impact test on this steel. Welding of SA-517, as like any other Q&T steel requires a great control and precautions on welding.

Where are you thinking of using this steel? Let me know if you require further details.

Thanks.

Pradip Goswami,P.Eng

Senior Engineer/Specialist(Welding-Metallurgy)

ONTARIO POWER GENERATION Inc.

Email- pgoswami@quickclic.net, pgoswami@sympatico.ca.

From: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca]
Sent: Wednesday, May 26, 2010 2:31 PM
To: GOSWAMI Pradip -THERMAL
Subject: FW: [MW:5263] gorup of SA517

Date: Wed, 26 May 2010 21:44:19 +0530
From: rutvikdixit@yahoo.co.in
Subject: Re: [MW:5263] gorup of SA517
To: materials-welding@googlegroups.com

Dear Ali,
for your point no. 1, I would like to say due to quenching in oil/water after heating the object to the required temp, the cooling rate will be very faster, so grain size will be less. In this case hardness and brittleness also increases, so to get toughness in the material we need to carry out tempering.

With Regards,
Rutvik
Sr.Surveyor
TATA Projects Ltd.

--- On Wed, 26/5/10, Ali Asghari <asghariali@rocketmail.com> wrote:

From: Ali Asghari <asghariali@rocketmail.com>
Subject: [MW:5257] gorup of SA517
To: materials-welding@googlegroups.com
Date: Wednesday, 26 May, 2010, 4:32 PM

Dear All

1-is Quenching & Tempering a process of grain refining?

2-SA 517 belong to curve A or B in UCS 66?

REGARDS

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