Re: [MW:14219] Welding C45 (1045)

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...........

On Wed, May 9, 2012 at 12:21 AM, salman cader <salman96996@gmail.com> wrote:
> 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 <pkhormis@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 <salman96996@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_nautiyal26@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
>>> >
>>> > From: LeONarD P <metpick@gmail.com>
>>> >
>>> > To: Materials & Welding <materials-welding@googlegroups.com>
>>> > Sent: Saturday, May 5, 2012 10:56 AM
>>> >
>>> > 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..
>>> >
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>>
>>
>>
>>
>> --
>> Thanks & Regards
>>
>> PRADEEPKUMAR HORMIS
>> Mob: +91-0-9496754791
>>
>>
>>
>>
>> --
>> To post to this group, send email to materials-welding@googlegroups.com
>> To unsubscribe from this group, send email to
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>> For more options, visit this group's bolg at
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>> 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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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.