Please read carefully ASM Vol.9 (Metallography) which says about the limitation in metallography to predict normalized structure of plain carbon steels.
Regards
On Thu, Dec 11, 2014 at 1:22 PM, <george.dilintas@gr.bureauveritas.com> wrote:
there is not a matter of Code. This is a matter of basic metallurgy. You may consult the Metals Handbook which is published by the American Society for Metals
best regards
Dr. Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)"'ehab harb' via Materials & Welding" ---11/12/2014 11:37:02---Dr. Georgios, Please advise if there is any reference for micro-structure for as rolled plate & No
From: "'ehab harb' via Materials & Welding" <materials-welding@googlegroups.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: 11/12/2014 11:37
Subject: Re: [MW:22541] Normalized carbon steel pipes
Sent by: materials-welding@googlegroups.com
Dr. Georgios,
Please advise if there is any reference for micro-structure for as rolled plate & Normalized one .
Br
ehab harb
From: "george.dilintas@gr.bureauveritas.com" <george.dilintas@gr.bureauveritas.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, December 9, 2014 12:48 PM
Subject: Re: [MW:22518] Normalized carbon steel pipes
Normalizing takes place at 900 - 950 degC with subsequent cooling in still air.
Heating at 900 - 950 degC means full re-austenization.
Subsequent cooling in still air leads to grain refinement.
Therefore normalizing changes the microstructure...
best regards
Dr. Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)
From: meisam shokri arfaei <meisamshokri@gmail.com>
To: materials-welding@googlegroups.com
Date: 09/12/2014 08:36
Subject: Re: [MW:22513] Normalized carbon steel pipes
Sent by: materials-welding@googlegroups.com
Dear Ali,
Unfortunately, there is no defined DT or NDT method for detection normalized samples. As you know in normalizing process there is no change in the microstructre. In those cases some standards suggest impact testing, but this test won't guarantee the normalization process as I individually have test some samples which they didn't normalize and passed the impact requirements.
Also keep in mind that premier companies do the normalization during their Thermo-mechanical process of rolling or milling and not in a separated process.
Regards
On Tue, Dec 9, 2014 at 9:08 AM, Ali Asghari <asgharialigl@gmail.com> wrote:
Dear experts.
In our material spec. said some C.S products shall be supplied in normalized condition.
Now received carbon steel pipe fabricated by normalized plate,but not said anywhere in certificates about heat treatment condition of pipe.
Is it possible to find with DT type of heat treatment? acc. to which standard?
This condition for which pipe size is critical?and if they are not normalized what have detrimental effect on member?
Regards.
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M. Shokri Arfaei
ISA-ISTS - Metallurgy Lab. Manager
ASNT NDT Level III
International Welding Engineer
Tel.: +98 21 66282127
Fax: +98 21 66282779
Mob.:+98 912 1394023
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