Previous in Forum: Oil Application   Next in Forum: Sewer water sprinklers
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
2 comments
Rate Comments: Nested
Anonymous Poster

Ferrite determination

05/30/2007 8:25 AM

Dear all,

I have to carry out a welding procedure qualification test on duplex stailess steel. It is required to determine the ferrite number of weld metal. As I know it can be done by metallographic methode or using special magnetic equipment. The question is 'can we determine FN through chemical content by using WRC 1992 diagram and what is its accuracy?'

Thank you very much for your comments.
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster
#1

Re: Ferrite determination

05/31/2007 8:26 AM

It is doubtful to calculate ferrite number using chemistry. Using the phase diagrams for the grade may be helpful if any research has been done to analyse the final weldment. Final answer would be purely theoretical.

However, cooling rate, heat input etc all affect the final results. I would suggest SEM is the best way.

Cheers
Reply
erssk
Power-User
Popular Science - Weaponology - New Member

Join Date: Dec 2006
Posts: 110
Good Answers: 3
#2

Re: Ferrite determination

06/01/2007 8:44 AM

Yes, Reference ASM Metals Handbook Vol 6 Welding and Brazing. Schaeffler or DeLong Diagram. Schaeffler diagram predicts within 4%.

__________________
 ONE TEST IS WORTH A THOUSAND EXPERT OPINIONS
Reply
Reply to Forum Thread
Have a Different Question?
2 comments

Previous in Forum: Oil Application   Next in Forum: Sewer water sprinklers

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (65 right now)
Show Members
Advertisement