--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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