Cracking on bending test

[nguyen tuan]

Hi All

We have bending test for PQ (welding process FCAW , Material CS to stainless steel ) result was fail (cracked). But We check PT can't find cracking .

Do somebody have same problem . what is conclusion .

Thanks you

Tuan

[george....@gr.bureauveritas.com]

What type of filler metal did you use

Sent from my BlackBerry 10 smartphone.

From: nguyen tuan Sent: Σάββατο, 9 Μαΐου 2015 - 07:23 To: material...@googlegroups.com Reply To: material...@googlegroups.com Subject: [MW:23236] Cracking on bending test

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[meisam shokri arfaei]

Hi,

This is not a crack. In dissimilar welding between two materials with huge difference in mechanical properties (in this case ductility) the effect of bending shown as difference in reaction of those materials to the suffered load. this line (probably in CS fusion line) is due to difference in ductility.

Regards

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ISA-ISTS - Metallurgy Lab. Manager

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[tuan...@gmail.com]

‎We used e309t1-1

Gửi từ điện thoại thông minh BlackBerry 10.

Từ: george....@gr.bureauveritas.com Đã gửi: 0:57 Chủ nhật, ngày 10 tháng năm năm 2015 Đến: nguyen tuan Trả lời đến: material...@googlegroups.com Chủ đề: Re: [MW:23247] Cracking on bending test

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/20150509175733.6443092.17956.5787%40gr.bureauveritas.com.

[george....@gr.bureauveritas.com]

So, if this filler metal was used correctly there would be no hot cracks there.
Please try to measure hardness in the area of cracks and compare with those of base metals

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04


tuanpvecc---10/05/2015 06:50:17---‎We used e309t1-1 Gửi từ điện thoại thông minh BlackBerry 10. Từ:  george....@gr.bureauveritas.

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[Chirag Sandhane]

This is general problem in FCAW process. This may not be crack, this is problem of interrun fusion. This problem comes only when u perform bend test. If u perform any NDT test, u will not find anything. Increase welding current for ur desire result.