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From: pgoswami <pgoswami@quickclic.net>
Subject: [MW:4063] RE:
To: materials-welding@googlegroups.com
Cc: "'sachin sankhe'" <sachin.sankhe@rediffmail.com>
Date: Wednesday, March 17, 2010, 9:43 AM
I have attached a brochure from Mittal Steel, which would be of interest to you. Typically steels undergoing PWHT can tolerate higher C.E (refer page-3 of this catalogue), based on the industry experience. C.E could be controlled to get balanced chemistry same time without sacrificing through thickness properties of steel.
You may find further requirements on C.E in the latest spec of SA-516 in ASME Sec-II , Part-C.
As mentioned below simulation temperature @ 6900C looks quite high for C-steel. Usually alloying elements other than C, Mn are required to provide the basic mechanical properties in the steel at this temperature. Typically soak temperature of C-Mn steel seldom would exceed 6400C.
Thanks.
88,Garth Trails Crescent
Hamilton,Ontario, L9B2X1,Canada
Email-pgoswami@sympatico.ca
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From: sachin sankhe [mailto:sachin.sankhe@rediffmail.com]
Sent: None
To: materials-welding@googlegroups.com
Subject:
Dear Friends
I have got query details are as follows
1.MOC-SA516 Gr.70
2.Application-Reactor Regenertaor Package for FCC unit
3.Thickness Range-50 mm to 100 mm
4.Carbon Equivalent limitation-0.43
5.Simulation Requirment-690 Deg. C with holding time 9 hrs(1 cycle of PWHT+ 1 cycle of Repair at shop + 1 cycle of Repair at site + 1 cycle for future repair)
With such stringent requirement no plate supplier is able to meet CE-0.43.Plate manufacturer can supply plate with CE-0.48 under such condition
kINDLY SUGGEST IF ANYONE HAS COME ACROSS SUCH SITUATION AND SUGGEST WHO IS SUPPLIER OF SUCH PLATE
Regards
Sachin.Sankhe
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