RE: 364] Re: SA516 Gr70 Impact value at -45 deg.c for >90mm thickness

[Bathula Raghuram (Mumbai - PIPING)]

Refer to Table A1.15 of SA20, SA516 Gr70 above 3" in thickness are
generally available with impact at - 28 deg.c, where SA516 gr 60 for
same thickness are available with impact at -45 deg.c, of course these
are just guidelines, even though energy values are less for Gr70, it
is the natural choice for the designer, since it has higher stress
value.

Now my another question is is the selection right? or SA537 cl2/3
would be appropriate for this thk and temp? which one is better?

-----Original Message-----
From: material...@googlegroups.com
[mailto:material...@googlegroups.com] On Behalf Of
pjo...@technip.com
Sent: Thursday, November 01, 2007 1:52 PM
To: material...@googlegroups.com
Subject: [MW:364] Re: SA516 Gr70 Impact value at -45 deg.c for >90mm
thickness

Except for Impact values after PWHT, Q +T material are excellent (far
better than N/N +T). You have to take care of PWHT cycle (Soaking
Temperature should be ~15 deg. below the Tempering temperature.)

In this view, it is better to ask for the impact testing with simulated
heat treatment (PWHT) Cycles.

Best regards,

Prasad Joshi
e-mail: pjo...@technip.com
Phone: +971-(0)2-611-6643

"Bathula Raghuram

(Mumbai -

PIPING)"
To
<R.Bathula@ticb.c
<material...@googlegroups.com
om> >

Sent by:
cc
materials-welding

@googlegroups.com
Subject
[MW:362] SA516 Gr70 Impact value
at
-45 deg.c for >90mm thickness

01/11/07 09:45 AM

Please respond to

materials-welding

@googlegroups.com

MDMT - 45 deg C. Reactor MOC is SA 516 Gr. 70 normalized + S5 (ASME
SecVIII div1)

In order to meet the min energy requirements during impact testing at
-45
deg C, proposal to Quench and Temper the plates in stead of Normalising
for
higher thickness (in excess of 90mm in thickness)

Can anybody share their experience w.r.t. impact energy values of N and
Q&T
(do we need ask for transition curves?) plates for high thickness at
temp
-45 deg.C and colder.

Save a tree...please don't print this e-mail unless you really need to.

Save a tree...please don't print this e-mail unless you really need to.

[Sudipto_...@fwuk.fwc.com]

I beleive low temp. material SA 537 is suitable.

Best Regards,
Sudipto Banerjee
Equipment Engg. Department
Office no. 0044-118-913 2295

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