On Sun, Jul 11, 2010 at 5:42 PM, pankaj abhang <pankaj.abhang1@gmail.com> wrote:
Dear Vaidehi,Sorry for previous data incorrectly sended.
Please find the actual values:-
The Chemistry for the Tubes as given belowThe Material Grade is- SA249 TP 304.C (MAX)- 0.08 Observed- 0.054Mn (Max)- 2.00 Observed- 1.14P (Max)-0.045 Observed-0.033S (Max)-0.030 Observed- 0.006Si (Max)-1.00 Observed- 0.42Cr (Max-20 Min-18) Observed- 18.07Ni (Max-11- Min -08) Observed- 8.21
Observed UTS Values- 651.4(Mpa)
Elongation- 62 mm
Hardness- 69-70
Micro- ASTM Grain size No.7
Heat Treatment- Solution annealed at minimum 1040 celcius & rapidly water quenched.
PANKAJ
On Sun, Jul 11, 2010 at 4:14 PM, Vaidehi Ganesan <vaidehi@igcar.gov.in> wrote:
--What is the material, compositions?best regards,Vaidehi Ganesan.=============================================================Dr. Vaidehi Ganesan,Metallurgy & Materials Group,IGCAR, Kalpajkkam-603 102, India.=======================================================------- Original Message -----From: pankaj abhangSent: Sat, Jul 10, 10 10:15Subject: [MW:5924] Inservice failureDear Members,We had supplied a Finned tube radiator after 1 year in service the header to tube joint getting shearing off near 10-15 mm from weld joint. what will be the reason for the failure.Details are as given below-Tube inside process fluid- Steam at 200 celciusTube MOC- SA 240 TP 249Tube Thickness-2 mmHeader pipe -3"NB sch10sHeader MOC- SA 240 TP 312Welding Joint- UW 16.1(d)Welding Technique- GTAWWorking pressure- 15 bar(g).
PANKAJ
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