Probably a dumb ? re: Irony Extrusion

[newattitude]

Don't laugh, lol, but the last load I took in I had separated what i thought was aluminum but the guy took it out of the rest of the aluminum and weighed it as irony extrusion. A magnet didnt' stick to it and there were no screws in it so what made it ''Irony?'' If it had iron in it wouldn't a magnet have stuck to it? I tell ya, seems every time I take something it gets weighed different (I scrap out at 2 different places) so they tend to keep me confused!! I tried googling irony extrusion but it really didnt help explain how it was different or why. Thanks for any help!

[hobo finds]

Bring your own magnet. When they start checking everything have them show you. On some alum screen doors they have hinges that are alum not steel. Everytime I bring in some they state that it is irony due to the hinges I put my magnet on it and show them that it is an alum hinge. Keeps it out of the irony/furnace/mixed/dirty pile!

[fiat128]

The hinges on screen doors have a steel rod holding the two halves together that's not really visible, maybe that was it.