Welding Magnet
Welding Magnet
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 4PC MINI MAGNETIC WELDING HOLDER SET  US $12.99
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 Mig Weld Framing Hammer 15oz DeWALT DWHT51145 Steel w Magnetic Nail Starter US $49.99
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 NEW MAGNET WELDING Holder 4 PC 10 lb SET US $13.99
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 MAGNETIC WELDING ANGLE HOLDER Multi ADJUSTABLE Free Shipping US $13.58
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 6PC LOT 75 lb Arrow Welding and Soldering Magnets US $21.95
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 PowerCraft 25 LBS Small Welding Magnet Holder MHS US $2.99
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 4 3 WELDING MAGNETS MAGNET ARROW 25LB STRENGTH US $13.85
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 5 SETS OF 4pc Mini Magnetic Welding Holder 20PCS TOTAL US $34.95
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 4 Pcs Mini Arrow Magnetic Welding Holder Welder Metal US $11.95
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 Magnetic Holder Extra Hand Welding Fabrication 25lb US $2.99
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 GENUINE BESSEY BDMS 1 BIG DADDY MAGNETIC HOLD DOWN SQUARE WELDING FABRICATION US $65.00
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 4 pc Mini Magnetic Welding Holder US $13.95
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 10LB 4PC MINI MAGNETIC WELDING HOLDER SET IN DOUBLE BLISTER US $12.96
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 2 x 4pc MAGNETIC ARROW WELDING HOLDER Free Shipping US $11.48
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| The Good Carpentry Blog |
do electromagnets decrease its magnetic force if it is welded to another metal o increase its surface area?
2 metals: one an electro magnet, the other a metal plate; when joined by welding, does it retain its magnetic power?
Assumming the plate is ferrous, similar in permeability to the core of the electromagnet, it will redistribute the lines of flux a bit, which instead of leaving the end poles of the core, will follow the plate out some distance then go through air to get to the other pole . This may be desireable or not, depending on your application, in particular where you want the lines of flux to flow though. Think of flux flow as similar to current flow, where ferrous and other magnetic materials are a very low resistance, and air and all other materials as a very high resistance. Your plate, if ferrous, provides a small amount of parallel low-resistance pathway for the flux, increasing the total flux for a given magnetic force. Flux density at the opposite end, the end not welded to a plate, will increase slightly.
If the plate is non-ferrous, brass, whatever, the magnetic field will not be affected, since such materials have the same low permeabilty (high resistance to flux flow) as air.
You don't mention your goal. If it's simply for mounting purposes, I'd say use a non-ferrous plate to avoid altering the the magnetic properties.
