Ferrous vs. non-ferrous metal comes down to one simple test: does it contain iron, and will a magnet stick to it? That single distinction decides how a scrap yard sorts your load, what it’s worth per pound, and how it gets processed once it leaves your truck. C4S Recycling buys both categories from homeowners, first-time scrappers, and contractors across El Cajon and East County, and this guide covers what separates them so you know what you’re hauling in before you ever reach the scale.
What Makes a Metal Ferrous
Ferrous metals contain iron, which is what gives steel and cast iron their strength and their magnetic pull. The Institute of Scrap Recycling Industries maintains standardized grading specifications for ferrous scrap covering everything from structural steel to cast iron and railroad scrap, and one requirement shows up across nearly all of them: the material has to be reasonably free of dirt, non-ferrous metals, and excessive rust before it grades at full value. Ferrous scrap is typically the highest-volume material on a demolition or cleanout job, even though it pays the least per pound of the common categories.
What Makes a Metal Non-Ferrous (and Why It Pays More)
Non-ferrous metals — copper, aluminum, brass, stainless steel, and zinc among them — contain no iron and don’t respond to a magnet. ISRI maintains a separate set of specifications for these materials because they behave completely differently in processing and carry meaningfully different values. Copper and brass sit toward the top of the pricing scale among common scrap; aluminum runs lower per pound but adds up quickly by volume. The reason non-ferrous metals generally pay more isn’t arbitrary — they’re scarcer, more energy-intensive to produce from raw ore, and more valuable to recycle back into new material. Aluminum is the clearest example: recycling it uses roughly 95% less energy than producing new aluminum from raw ore, according to the International Aluminium Institute, with a similar percentage saved in greenhouse gas emissions.
The Quick Magnet Test You Can Do at Home
You don’t need a scale or an expert to sort your own load before you arrive. Grab a refrigerator magnet and touch it to the metal — if it grips, you’re holding ferrous scrap like steel or iron. If the magnet doesn’t stick, it’s non-ferrous: copper, aluminum, brass, or stainless. This takes seconds per piece and it’s the single fastest way to presort a mixed load into two piles before you ever load the truck.
Common Ferrous Scrap Around the House and Job Site
Old appliance shells, steel pipe, rebar, structural beams, car parts, and most demolition debris fall into the ferrous category. On a job site, this is usually the bulk of what comes out of a tear-out — heavy, plentiful, and straightforward to sort once it’s separated from everything else. Old water heaters, filing cabinets, box springs, and steel fencing are common household sources most first-time sellers don’t think to bring in, and all of it grades as ferrous scrap once it’s clear of non-metal attachments.
Because ferrous scrap is high-volume but lower-value per pound, weight is what drives the payout more than sorting precision. A truck bed of mixed steel debris is still worth bringing in — it just won’t price like a load of clean copper wire.
Common Non-Ferrous Scrap Around the House and Job Site
Copper wire and pipe, aluminum siding and window frames, brass fittings and fixtures, and the aluminum or copper components inside an old AC unit or chiller are the non-ferrous scrap most people encounter. Aluminum cans, gutters, and old lawn furniture frames are smaller-volume but genuinely worth separating out rather than tossing in with steel. If you’re scrapping HVAC equipment specifically, refrigerant has to be recovered first under federal law before the unit can be broken down for metal — our guide to recycling an old AC unit or chiller walks through that requirement in detail.
Why the Distinction Matters for Your Payout
Mixed loads get sorted at the yard regardless, but sorting at home before you arrive gets you a better number for one simple reason: a scale reading on unsorted mixed metal defaults toward the lower blended rate, while presorted ferrous and non-ferrous piles each price at their own, usually higher, rate. Separate steel from copper and aluminum, keep wire and fittings in their own pile, and you’ll see the difference reflected in what we can pay. For the full picture of how pricing actually moves week to week, see our scrap metal prices guide. Ready to bring in a load? Get today’s pricing before you make the trip.
We buy both categories from walk-in sellers and contractors across El Cajon, Santee, La Mesa, Lakeside, Spring Valley, Rancho San Diego, and Alpine — see our full service area coverage, or read more about our 20-plus years in East County scrap and demolition work on our About Us page.
Frequently Asked Questions
Is stainless steel ferrous or non-ferrous?
Non-ferrous, despite the name. Most stainless steel contains enough chromium and nickel that it’s only weakly magnetic or not magnetic at all, and it’s graded and priced separately from carbon steel.
Why does non-ferrous scrap pay more than ferrous scrap?
Non-ferrous metals like copper and aluminum are scarcer and more energy-intensive to produce from raw ore, which makes recycled material more valuable to buyers than abundant ferrous scrap like steel.
Do I need to sort my scrap before bringing it in?
You don’t have to, but it helps your payout. A magnet test and a few minutes of sorting at home typically means a better per-pound rate than an unsorted mixed load.
Where can I sell ferrous and non-ferrous scrap metal near El Cajon?
C4S Recycling buys both categories from walk-in sellers and contractors throughout East County. Call 760-521-9066 or check our FAQ page for hours and accepted materials.
Ready to Get Started?
Sort your load by the magnet test, and we’ll handle the rest — accurate weigh-ins and fair pricing on both ferrous and non-ferrous scrap.
Get Today’s Pricing or call us at 760-521-9066.