Re: [MW:14194] Welding C45 (1045)

This is due to the high carbon content of C45. I would suggest that you increase the preheat to 200 and after completion of the welding you perform the so called hydrogen back out treatment by maintaining the preheat temperature at 200 - 250 deg C for 2 hours.
I would suggest also to use a lower heat input process (GTAW or SMAW with low hydrogen electrodes)
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager


----- Original Message -----
From: LeONarD P [metpick@gmail.com]
Sent: 04/05/2012 22:26 MST
To: "Materials & Welding" <materials-welding@googlegroups.com>
Subject: [MW:14187] Welding C45 (1045)



Dear All expert

Welding C45 (1045) steel (Pivot Boss) to S275JR (main
structure)

1045 Pivot Boss is casting part.
S275JR is steel plate

For a project I need to weld a C45 (1045 steel, 0.45% carbon Thick 100
mm) on a S275JR steel ( Thichness 30 mm.)

Joint design & condition weld: T-butt joint, double bevel, CJP. Bevel
at S275JR steel.
preheat 110 C
minimum,. interpass temp 220 C max.
by FCAW process.
A5.20 / E71T-1C


After weld, the problem is crack appear along on surface casting
part (1045 steel)

How to solve this problem.

Thank you very much.
leonardd..

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
NOTICE: This message contains information which is confidential and the copyright of our company or a third party. If you are not the intended recipient of this message please delete it and destroy all copies. If you
are the intended recipient of this message you should not disclose or distribute this message to third parties without the consent of our company. Our company does not represent, warrant and/or guarantee that the integrity of this message has been maintained nor that the communication is free of virus, interception or interference. The liability of our company is limited by our General Conditions of Services.
Nota : Ce message contient des informations confidentielles propriété de notre société et/ou d'un tiers. Si vous n'êtes pas parmi les destinataires désignés de ce message, merci de l'effacer ainsi que toutes ses copies. Si vous êtes parmi les destinataires désignés de ce message, prière de ne pas le divulguer ni de le transmettre à des tiers sans l'accord de notre société. Notre société ne peut garantir que l'intégrité de ce message a été préservée ni que la présente communication est sans virus, interception ou interférence. La responsabilité de notre société est limitée par nos Conditions Générales de Services.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.