Re: [MW:32211] SM490A weld to railway

Is this the new Japanese high-speed rail project in India...?

Ramin  Kondori

Sr. QA/QC & Welding Engineer

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PG-Dip. in Welding Engineering (IWE  AT  0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

                        

On Thu, Apr 8, 2021 at 3:21 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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