where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
MT Field Strength Equation
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

289 views
03:55 Sep-08-2004
Anonymous
MT Field Strength Equation

Where does the 45,000 constant come from in the equation to determine longtitudinal field strength using the length/diameter ratio when using Magnetic Particle testing?



    
 
03:02 Sep-09-2004
DJ Kallhof
Re: MT Field Strength Equation ----------- Start Original Message -----------
: Where does the 45,000 constant come from in the equation to determine longtitudinal field strength using the length/diameter ratio when using Magnetic Particle testing?
------------ End Original Message ------------
It is considered a rule of thumb. By using 45,000 while in contact with the coil and 43,000 centered the resultant flux density will be 70,000 lines per square inch (110 lines per square mm). To quote BETZ;"Extensive experimental work has shown that a field of 70,000 lines per square inch is a satisfactory field strength for almost all cases of coil magnetization.




    
 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|