[MW:23552] Regarding failure in bend test

Hi Chirag,

 

SS. 310 is a fully austenitic stainless steel and well known for hot cracking. Welds do solidify with very little or low( as low as 0%) delta ferrite. Delta ferrite is a "trap" for all impurities, such as "S" and"P".

Cracking phenomena in 310 S.S welds  is called "Hot Cracking", is further aggravated by the presence of higher "C". in the weld( which may be the case  ER-310 filler metal).

 

Advice would be to get a filler/ electrode( 310L grade) with very low "S" and "P" and"C". The  attached data sheet  is for your reference. Also you may read through this paper (LINK BELOW) to get detailed guidelines for solidification /hot cracking problem in fully austenitic stainless steels.

 

 

Thanks.

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Engineering Specialist

Hamilton, Ontario, Canada

pgoswami@quickclic.net

pradip.goswami@gmail.com

ca.LinkedIn.com/pub/pradip-goswami/5/985/299

 

http://www.ias.ac.in/sadhana/Pdf2003JunAug/Pe1119.pdf

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Harish Kannepalli
Sent: Friday, September 25, 2015 6:24 AM
To: Chirag Sandhane; materials-welding@googlegroups.com
Subject: [MW:23540] RE: 23537] Regarding failure in bend test

Hi Chirag,

                It seems the weld is sensitized. Please do micro examination to confirm the same.

 

Sent from Mail for Windows 10

 

 

From: Chirag Sandhane
Sent: 25 September 2015 11:07
To: materials-welding@googlegroups.com
Subject: [MW:23537] Regarding failure in bend test

 

 

Dear experts,

We have welded SA 240 TP310S to SA 240 TP310S plates with ER 310 filler wire. We get RT clear of the joints but get cracks in root & face bends. I am attaching photo of the same. Please give your expert advice for the same.

Thanks & regards,
Chirag Sandhane

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