Best steel for DC electromagnet
Best steel for DC electromagnet
(OP)
All,
I've read a number of threads that indicate 1018 steel annealed and 430 stainless are commonly used for solonoids.
My design problem is to pick the best material for a DC electromagnet. Would sombody please recommend a material, either one of the two I mentioned or something different?
Thank you.
I've read a number of threads that indicate 1018 steel annealed and 430 stainless are commonly used for solonoids.
My design problem is to pick the best material for a DC electromagnet. Would sombody please recommend a material, either one of the two I mentioned or something different?
Thank you.





RE: Best steel for DC electromagnet
RE: Best steel for DC electromagnet
Good point. I'm looking for high permeability so I can get the strongest flux density for a given number of turns and current. Environment is not important because the part will be encapsulated. I'm not sure about saturation though. I'd probably start with permeability as the metric then compare saturations.
RE: Best steel for DC electromagnet
RE: Best steel for DC electromagnet
RE: Best steel for DC electromagnet
About your questioms, I think there is no difficulties if you explaine what you pretend in terms of:
1) magnetic properties ( Max. Permeability, Hc, Br )
2) how much is important machinability ?
3) Stainless or not ?
4) Is material easy available in stock ?
5) it is more easy to find a 3"bar stock of mild steel, Carbon or alloy steel than 430( free machined or not ) stainless grades. This depends on how many pound ( kg ) or tons you need for your design.
6) there is a lot of magnetic data available about 430 and similar grade : what do you want ?
7) Do you use the part as delivered and machined ( after turning , drilling and so on ...)or machined and annealed( stress relieved ) ? Vacuum or annealed and then machined in order to take away the stock remooving?
8) what is the final dimension ( thickness and leghth ) ?
9) Do you obtained Hollow or solid state blanks ?
10 What about magnetic testing ? Costs ? DC o AC ? How much it cost for a single sample?
Let me know if you need more info !
RE: Best steel for DC electromagnet
RE: Best steel for DC electromagnet
http://w
RE: Best steel for DC electromagnet
You will have to register but this is a link to an article on selecting soft magnetic alloys:
http://www.cartech.com/techarticles.aspx?id=1624
RE: Best steel for DC electromagnet
remetaper: Do you have a title for the paper? I can't locate it.
BobM3: Good link, will consider the material.
dgallup: Thanks for the 12L14 suggestion. My test house reccommended that also.
Steve
RE: Best steel for DC electromagnet
RE: Best steel for DC electromagnet
Saturation is all that matters.
Any low carbon steel grade with less than 0.2%C that has been annealed at 1400-1475F with a slow cool should give very nice high saturation levels.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Best steel for DC electromagnet
ht
but I am noting that cutting data about machinability are disappeared compared to Magival Shangay,2000. I don't know the reason why.However these links ( Cartech and Valbruna ) are useful for beginners and students giving an idea about Magnetism and the choice of right steel grade.
SREID: In my opinion 1018 and 12L14 give permeability more than 1000 when annealed and slow cooled. Nevertheless, consider that Ni or Cr plating process ( after magnetic annealing)reduces permeability due to Hydrogen adsorbation. Several test of Silicon -Iron alloy confirm this problem . However a simple baking (390-400 F) after plating restores magnetic properties.
EDSTAINLESS: you are right : I fully agree !
RE: Best steel for DC electromagnet
My application is A-C and I'm looking to create a high Q sensor coil. I need to machine the metal to a particular size so standard cup-core ferrite is out of the question.
RE: Best steel for DC electromagnet
Actually I have two projects. One is A-C the other is D-C.