stainless steel wire rope and magnetism

[patholahan]

I'm not surprised that stainless steel wire rope has magnetic properties, but I can't explain exactly why. How is wire rope made and what kind of cold working processes does it go through that would give it these slight magnetic properties?

 

[EdStainless]

Yes, it is from the cold work. Strain induced martensite formation. The wire is cold drawn to a desired strength level and the work more during the stranding process.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[Robertmet]

This is dependant on chemistry too. 300 series has an Ms [start of martensite transformation] temperature below room temperature but sometimes the Md temperature is just above room temperature.Cold working then transforms some of the austenite to martensite so it becomes slightly magnetic. Common question but many don't know about the Md temperature !!