TL;DR
Scrap metal is recycled by splitting it into ferrous and non-ferrous streams with a magnet, grading it by alloy and cleanliness, shredding it, then melting it at a mill. Cleaner and better sorted metal is worth more, every single time.
Most people meet this system exactly once, when an old water heater or a pile of fence posts needs to leave the property. Knowing what happens after the truck pulls away helps you decide whether to sort a load, sell it, or just have it hauled.
What Actually Counts as Scrap Metal?
Scrap metal is any metal item that can be melted down and made into new metal. That includes appliances, bed frames, radiators, wire, pipe, gutters, engine blocks, and the steel skeleton inside a couch. It does not include metal that is bonded to something that cannot be separated cheaply.
The practical test is whether a yard can get clean metal out of the item without spending more on labor than the metal is worth. A steel filing cabinet passes. A composite garage door with foam bonded to thin skin often does not.
Mixed household junk still contains a surprising amount of recoverable metal, which is one reason a careful crew will sort junk for recycling before anything goes to a landfill.
The Magnet Test: Ferrous vs Non-Ferrous
Every scrap yard starts with the same question: does a magnet stick? If it sticks, the metal is ferrous, meaning it is iron or steel. If the magnet slides off, it is non-ferrous, which covers aluminum, copper, brass, lead, zinc, and stainless.
That single split drives almost everything downstream. Ferrous metal is heavy, common, and low value per pound. Non-ferrous metal is lighter, scarcer, and worth many times more per pound.
You can run this test at home with a cheap refrigerator magnet. It is the fastest way to know whether the pile in your garage is worth separating or whether it is mostly steel that will be paid by the ton.
How a Scrap Yard Grades a Load
Grading is a judgment about purity and shape. Yards buy against named grades, and the grade decides the price. A few common ones you will hear at the scale house:
| Grade | What it usually means |
|---|---|
| Shred or light iron | Thin steel, appliances, car bodies, mixed household metal |
| Heavy melting steel | Thick plate and pipe, cut to length |
| Clean copper | Bright, bare wire or tube with no fittings or insulation |
| Insulated wire | Copper with jacket still on, paid at a discount |
| Cast aluminum | Engine parts, transmission cases, some cookware |
| Stainless | Non-magnetic sheet and food-service equipment |
Contamination knocks a load down a grade. A brass valve full of steel bolts is not clean brass. A copper coil with plastic end caps still on it is not bright copper.
What Happens at the Shredder
Bulky ferrous scrap goes into an industrial shredder that reduces a whole appliance to fist-sized fragments in seconds. Downstream of the hammers, the plant separates the mix in three passes.
A drum magnet pulls the steel out first. Air classifiers blow off the light fluff, which is the foam, fabric, and plastic that was never metal to begin with. Then an eddy current separator flings the non-ferrous pieces off the belt into their own bin.
The result is a steady stream of clean shredded steel and a smaller stream of mixed non-ferrous that gets refined further, sometimes by optical sorters that read the alloy off each fragment.
From Shredded Steel to a Mill Furnace
Shredded steel is sold to mills that run electric arc furnaces. The furnace charges scrap, melts it with electrodes, adjusts the chemistry with alloy additions, and casts billets or slabs. Steel can go through this loop repeatedly without losing structural quality, which is why steel is one of the most recycled materials on earth.
Aluminum follows a similar path with far less energy than making new metal from ore. Copper is remelted and refined back to wire bar. Very little of a properly sorted metal load ends up buried, which is a real difference from most other junk streams. If you want the wider picture, see how much of a load gets recycled on a typical job.
What a Mixed Metal Load Is Actually Worth
| Material | Relative scale price |
|---|---|
| Mixed shred and light iron | Lowest, priced per ton |
| Heavy melting steel | Higher, priced per ton |
| Aluminum, clean | Priced per pound |
| Bare bright copper | Highest, priced per pound |
Scrap markets move with global demand and can swing hard in a single quarter. Yards also deduct for moisture, dirt, and non-metal attachments, and many set a minimum weight before they pay at all. For a household load, the real math usually comes down to fuel, time, and whether you own a trailer, which is covered in hauling it yourself to a scrap yard.
FAQ
Is it worth separating metal before a junk pickup?
It is worth separating non-ferrous metal like copper, brass, and aluminum, because those are paid by the pound and are easy to spot. Separating steel usually is not worth the effort for a household load, since steel is paid by the ton and one appliance weighs very little on that scale.
Do junk removal companies pay you for scrap metal?
Most do not pay cash, but many credit heavy clean metal against the job or price the load lower because the metal offsets disposal cost. Ask before the crew arrives. If the load is nearly all metal, the pricing conversation is different from a mixed junk load.
Does a magnet really tell you what metal something is?
A magnet tells you whether the metal is ferrous or non-ferrous, which is the first and most important split. It does not tell you the alloy. Stainless steel is a common surprise, because most food-service stainless is only weakly magnetic or not magnetic at all.
What metal items should never go in a scrap load?
Sealed pressurized items, fuel tanks that have not been purged, and anything holding refrigerant or oil. Propane cylinders, fire extinguishers, and sealed shocks can rupture in a shredder. Appliances with refrigerant need the gas recovered first by a certified technician.
Why does insulated wire pay so much less than bare wire?
The yard has to strip or granulate the jacket to get to the copper, and the recovery rate is uncertain until they process it. They price for that labor and risk. If you have a large volume of heavy-gauge wire, stripping it yourself can move it up a full grade.
Getting Metal Off Your Property
Most homeowners do not have the trailer, the time, or the interest to run a scrap yard errand, and a single appliance rarely pays for the trip. If you want it gone without the sorting, see junk removal and ask how the metal is routed. Tell us what you have when you request a quote and we will tell you honestly whether the scrap value of the metal in a load changes your price.
