Welding C45 (1045)

[LeONarD P]

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..

[george....@gr.bureauveritas.com]

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

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[prem nautiyal]

Hi

 

Increase the preheat to 150 degrees Celcius min. Interpass temp 250 degrees celcius max.

Use SMAW E7018-1 electrode.

 

I have successfully welded C45 material with E7018-1.

 

Regards

 

Prem Nautiyal

From: LeONarD P <met...@gmail.com>
To: Materials & Welding <material...@googlegroups.com>
Sent: Saturday, May 5, 2012 10:56 AM
Subject: [MW:14187] Welding C45 (1045)

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[Vimal Mistry]

Hi,

 

You can do post cooling with wrapping a glass wool at weld joint- immediate after welding completion. This will also help to resist crack in this higher carbon steel.

 

Best Regards,  

 

Vimal Mistry

 

 

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[salman cader]

Hi you got a Carbon content of .45....use an Austernetic stainless
steel consumable because it gives more ductility and and less strength
and it will relieve internal stress.but your HAZ zone will still be
brittle so you have to do a PWHT(stress relief)temperatures for stress
relief range between 550-750 degrees Celsius ..Note 1 hour for every
25mm of thickness so you do the maths and you ll be fine...this is
according to procedure

Salman
Gem Consulting

> materials-weld...@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.
>
>

> --
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[pradeep kumar hormis]

Dear Salman

Totally contradictory statements you had given. cann't accept by professional welding theory.

Thanks & Regards

PRADEEPKUMAR HORMIS
Mob: +91-0-9496754791

[salman cader]

the information i gave you comes from notes i got when i did my cswip
level 2 welding exam .......i never came across welding a hi carbon
steal higher than .4 but this what the notes told me when you welding
a steel of a carbon content higher than .5 so get a second opinion
then....my bad
but when im welding steel of a carbon content of .3 to .4 this is what
id do..... Parts may be readily welded with all process if preheat,
interpass temperature controls, and post heat recommendations are
followed.

Use Low hydrogen Electrodes and appropriate filler wire.

Heat treating after welding may be applied

[salman cader]

The high carbon steels are used for their wear resistance and hardness
(for example toolsteels). They are generally very brittle and require
pre-heating, interpass heating and post weldstress relief to prevent
cracking.Most medium carbon steels require one or more of the above
treatments depending on carbon level and joint thickness. They are
always welded with low hydrogen processes or consumables and it is
usual to perform a weld-ability test before production welding.WELDING
OF LOW ALLOY Steels The most common low alloy steels are the nickel
steels, the carbon-molybdenum and the chromium-molybdenum alloys.
Nickel from 2% to 5% in a 0.15% to 0.25% carbon steel provides a
combination of high strength and high toughness at low temperatures.
If the carbon level is below 0.18% welding can be done without
pre-heat. Above this level, similar precautions to those recommended
for medium carbon steels should be adopted.The carbon-molybdenum and
chromium-molybdenum steels are used for high temperature applications
as they have high creep resistance and high strength. Below 0.18%
carbon no pre-heat is required, but thicker sections with higher
carbon levels are hard-enable in air and therefore crack sensitive.
For very high carbon levels (0.55%) where welding is not recommended,
an austenitic stainless steel consumable can sometimes be used. The
weld will have more ductility and less strength than the parent plate
and will relieve some of the internal stress. The HAZ will still be
brittle, however, making pre-heat essential.
I hope this will hep you in some way...........

[Pick]

Dear All.

 

              Thank you for good information.

pls. see attached picture additional info. 

pls advice.

 

 

 

thank all.

leonard.

 

2012/5/8 salman cader <salma...@gmail.com>

[Anthony]

iHave used E 312-16 electrode form Hyundai very effectively for C45
to general steels welding with preheating as per thickness.
this electrode has a high resistance to cracking.
should you have the opportunity look into the use of the same and i
can guarantee satisfactory results.
Anthony

On May 11, 4:53 am, Pick <metp...@gmail.com> wrote:
> Dear All.
>
>               Thank you for good information.
> pls. see attached picture additional info.
> pls advice.
>
> thank all.
> leonard.
>

> 2012/5/8 salman cader <salman96...@gmail.com>

>
>
>
>
>
>
>
> > the information i gave you comes from notes i got when i did my cswip
> > level 2 welding exam .......i never came across welding a hi carbon
> > steal higher than .4 but this what the notes told me when you welding
> > a steel of a carbon content higher than .5  so get a second opinion
> > then....my bad
> > but when im welding steel of a carbon content of .3 to .4 this is what
> > id do..... Parts may be readily welded with all process  if preheat,
> > interpass temperature controls, and post heat recommendations are
> > followed.
>
> > Use Low hydrogen Electrodes and appropriate filler wire.
>
> > Heat treating after welding may be applied
>

> > ue, May 8, 2012 at 4:07 PM, pradeep kumar hormis <pkhor...@gmail.com>

> > wrote:
> > > Dear Salman
>
> > > Totally contradictory statements you had given. cann't accept by
> > > professional welding theory.
>

> > > On Mon, May 7, 2012 at 5:12 PM, salman cader <salman96...@gmail.com>

> > wrote:
>
> > >> Hi you got a Carbon content of .45....use an Austernetic stainless
> > >> steel consumable because it gives more ductility and and less strength
> > >> and it will relieve internal stress.but your HAZ zone will still be
> > >> brittle so you have to do a PWHT(stress relief)temperatures for stress
> > >> relief range between 550-750 degrees Celsius ..Note 1 hour for every
> > >> 25mm of thickness so you do the maths and you ll be fine...this is
> > >> according to procedure
>
> > >> Salman
> > >> Gem Consulting
>

> > >>  Mon, May 7, 2012 at 7:10 PM, prem nautiyal <prem_nautiya...@yahoo.com>

> > >> wrote:
> > >> > Hi
>
> > >> > Increase the preheat to 150 degrees Celcius min. Interpass temp 250
> > >> > degrees
> > >> > celcius max.
> > >> > Use SMAW E7018-1 electrode.
>
> > >> > I have successfully welded C45 material with E7018-1.
>
> > >> > Regards
>
> > >> > Prem Nautiyal
>

>  Weld c45.png
> 988KViewDownload
>
>  crack.jpg
> 159KViewDownload
>
>  crack1.jpg
> 262KViewDownload

[salman cader]

I checked out your chemical composition and it has a chemical
composition of carbon.12/chromium 29.3/Nickel 9.4/Manganese1.8.If you
know your metals then this would be categorized as an Austernetic
stainless steel.Different countries have different electrodes but the
chemical compositions are basically the same......so in my experience
iv been in different countries and British standard rods and American
standard rods have different code names but the chemicals are the same
...but thank you for informing me of the Korean version Electrode.