Welding Process for Rail Material A75 ( DIN 536)

[Vinu Raveendran]

Dear Experts,

Please advise what welding process is recommended to join rail material A75 (DIN 356) and as per which reference code/standard. Also mention what NDT to be performed.

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VINU RAVEENDRAN

[srinivas rao]

Dear Vinu,

Most commonly used welding process's for  rail welding is 

1. Flash butt welding process  

2. Thermit welding process 

Regards,

Srinivasarao

Welding engineer , GPS 

[Sreejith S Nair]

 Dear Vinu 

 Refer to AWS D15.12 for the Thermite welding process used for rail welding.

 

 

SREEJITH.S NAIR

 

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[vinu raveendran]

Dear Rao,

Thanks for the advise.

Can you please share as per which code we need to do a PQR coupon  and what mechanical/ NDT tests need to perform for qualifying WPS. 

[srinivas rao]

Dear Vinu ,  

please  refe tthe AWS standard / ISO standrds for this  flash but welding / thermit welding of rails  

AWS D15.2/D15.2M- Recommended Practices for the Welding of Rails and Related Rail Components for Use by Rail Vehicles to get some basic idea about qualification  and ask your cleint are they having project specifcations for  rail welding.

type of tests required for any welding procedure will be confimed by welding code , contrsctuintion code& project specifications& recommended practices applicable for a project .

common test fro rail welds are 

NDT - RT/ UT(PREFERABLE) , MT

weld chemistry 

macro

hardness

metallurgucal test

bend test 

TRANSFER TESTS  

 MICRO (METALLURGYCIAL ANALYSIS )

Thanks & regards, 

Srinivas Rao