If you have a piece of metal that is not strongly attracted to a magnet, then it is not a meteorite.
The metal in iron meteorites, stony-iron meteorites, and pallasites strongly attracts a cheap ceramic magnet. Man-made iron metals, e.g., wrought iron, cast iron and dome steels, however, also strongly attract a cheap magnet.
The metal in meteorites is mostly composed of iron but also at least 5% nickel.
The metal in iron meteorites consists of two alloys that together are commonly called iron-nickel (FeNi) metal. If it looks like metal and attracts a magnet, then you have to have it analyzed for iron, nickel, manganese, and chromium to determine whether it is man-made or an iron meteorite. Very few industrial metas contain >5% nickel.
People often tell me that they can “see” nickel or that their metal detector “sees” nickel. No, sorry, it does not work like that. You cannot determine if a piece of metal contains nickel just by looking. Chemical tests are required.
Man-made metal things rarely have the shape of an iron meteorite.
It is often easy to tell that a metal thing is man-made just from the shape. Iron meteorites are rounded but not spherical. There are no straight lines, right angles, vesicle, or flat parts. I have never seen an iron meteorite that was long and thin. Also, unless it is very rusty, you cannot break an iron meteorite and it will not have broken sides. Here are some photos people have sent to me of objects that look like iron meteorites to me.
Except for the alleged pallasite, all of the photos below were sent to me by people who thought the object might be a meteorite. I suspect that many of these things were found with metal detectors. In my opinion, all this stuff is man-made.
There are a lot of pictures here because many persons have sent me photos on man-made metal things.