--Hi Vishwas,
I agree with you on the electrode selection.
Need your advice, using high tensile electrode can lead to brittleness?
The problem im facing now is, client keep on insisting to use E7016 instead of high tensile electrode.
Having hard time to convince the client.
Anyways appreciate your input.
Sent from Mail for Windows 10
From: Vishwas Keskar
Sent: Saturday, 10 April, 2021 12:40 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:32202] SM490A weld to railway
Railway material is with High Carbon so will have high strength with High HAZ hardness .
The electrode deployed - E7016 has less strength .
Use E11018 with pre heating and 3.15 dia with stringer bead technique.
After full welding , maintain pre ehat maintenance say 350 Deg C - 2 HRS and then cool under insulation
This shall
On Sat, Apr 10, 2021 at 8:16 AM Pravin Poornachandran <htcispravin@gmail.com> wrote:
Dear Sir,
Enclosed material properties of railway material, while SM490A is ordinary mild steel with low carbon content <0.3%
Along I have enclosed picture of the crack.
1st picture was without preheat, while 2nd picture was with preheat 230degC & postheating 250degC x1hr.
However, crack still occurs. I'm bit lost at this point.
Sent from Mail for Windows 10
From: Vishwas Keskar
Sent: Thursday, 8 April, 2021 8:04 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:32191] SM490A weld to railway
Pl. send MTCs of both the materials
On Thu, Apr 8, 2021 at 2:51 PM Pravin Poornachandran <htcispravin@gmail.com> wrote:
Dear Expert,
We are doing a weld joint with following base metal combination:
SM490 weld to railway (alloyed, high tensile material)
I used E7016 for this welding, after 4 hours, crack was observed on the weld toe,
however there is no crack on the weldment, thus I assume this is cold crack.
Crack was noticed on the railway material, not on SM490A material.
Welding condition:
Baking was done 300-350degC x 1hr
thickness: 16mm both material
Preheat: 200degC
Post heating: 250degC x 1hr
Can anyone advise how to solve this crack defects
Best regards,
Pravin Poornachandran
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