Scrap basics: what counts, how it flows, who buys it
This category covers the foundation: a working definition of scrap, the ferrous-vs-non-ferrous split that drives every grade ladder, and the supply chain that connects a curbside appliance to a steel mill in Indiana. Read this before the Grades, Equipment, or Yards categories — the rest of the silo assumes you already know the words.
What counts as scrap
Plenty of metal isn't scrap. A reusable copper fitting is a part. A rusted-through pipe with no resale is scrap. The line between the two is whether the next economic step is remelt (scrap) or reuse (parts). The remelt destination sets a price ceiling: a mill pays for recoverable metal content, not for shape or fit.
The industry also splits scrap by where it comes from:
- Home scrap — offcuts that never leave a mill, recycled in-house
- Prompt (industrial) scrap — clean, single-alloy offcuts from manufacturers; the cleanest feedstock outside the mill itself
- Obsolete (post-consumer) scrap — appliances, end-of-life vehicles, demolition steel, retired wire — what walks into a yard
Most of what a private seller brings in is obsolete scrap. Mixed-metal assemblies — motors, transformers, ballasts, sealed compressors — get their own pricing because the valuable copper is locked inside steel housings, and the yard has to break the unit down before any of it can be graded.
How scrap flows from source to mill
| Stage | Who handles it | What happens |
|---|---|---|
| Source | Sellers, contractors, demolition crews | Material leaves its original use |
| Yard | Independent or chain scrap yard | Sorted, graded, weighed, paid |
| Processor | Regional shredder or shear | Sized for furnace charge |
| Mill | EAF or BOF mill | Remelted into new product |
| Mill customer | Fabricators, automakers, builders | Buys the new ingot or coil |
Yards take a margin between what they pay you and what the processor pays them. The Scrap Yards category explains how that margin is calculated and where you have leverage.
What sellers most often get wrong
- Treating scrap like trash — a load tossed into the bed is downgraded by mixing
- Skipping the magnet test — stainless gets sold as carbon steel and pays a fraction of its real value
- Not asking which yard sorts vs. shreds — sorting yards typically pay better for clean grades
- Not stripping copper wire — bare-bright copper can pay 50–100% more than insulated, and the labor is straightforward (covered in Copper & Wire)
- Showing up at 4:55 PM — most yards stop accepting drops 30 minutes before close
Frequently asked questions
What's the most valuable scrap metal?
Per pound, copper — especially bare-bright copper. Per load, catalytic converters can dwarf everything else, but they're tightly regulated. See Copper & Wire for the copper grade ladder.
Do I need an ID to sell scrap?
Most US states require a driver's license, and many require a thumbprint or signed declaration for non-ferrous over a low dollar threshold. Cash payouts are commonly capped (often $25–$100); above that, a check or ACH is the default.
What's the difference between scrap and recycling?
Scrap is the material; recycling is the process. The Recycling Guide covers the process side end-to-end.
Related guides
- Scrap for Metal: A Beginner's Guide — first-load walkthrough
- Scrap Grades — once you know the categories, learn the ladders
- Scrap Yards — how the buy side actually works
- Metal Recycling — the post-yard half of the chain
- Copper Price — live pricing context for the metal that pays best