What is ferrous and non-ferrous metal? A seller’s comparison guide
If you’re sorting demolition debris, manufacturing offcuts, or a workshop cleanout, the question what is ferrous and non ferrous metal decides how much money walks out of your yard. The split is simple: ferrous metals contain iron, non-ferrous metals don’t. That single difference drives weight, corrosion, magnetism, and price per pound at every South Florida scrap yard.
What makes a metal ferrous?
A ferrous metal is any metal whose main ingredient is iron. Steel, cast iron, wrought iron, and most structural building beams fall into this group. Carbon steel, the workhorse of construction, gets its strength from iron alloyed with a small percentage of carbon. Stainless steel is the odd cousin: it contains iron but adds chromium and nickel, which lift its scrap value well above plain steel.
Non-ferrous metals carry no iron in their base composition. Copper, aluminum, brass, lead, zinc, nickel, and tin all qualify. So do precious metals such as gold and silver. These metals resist rust because iron oxidation isn’t part of the equation, and many keep their full structural properties through repeated recycling cycles without losing value.
Does the magnet test work to tell ferrous from non-ferrous metal?
A magnet test is the fastest field check you can run, and it works most of the time. Stick a household magnet on the piece. If it grabs, you’re holding a ferrous metal. If it slides off, the metal is almost certainly non-ferrous. Contractors and demolition crews use this trick daily before loading the truck.
The test has one famous exception: most grades of stainless steel are technically ferrous but contain enough nickel to weaken or kill magnetic pull. A weak magnet response can mean stainless, not aluminum. When the result feels ambiguous, weight is a useful tiebreaker. Aluminum feels light for its size, while stainless feels dense and cold to the touch.
Ferrous vs. non-ferrous metals at a glance for your help
The categories diverge across nearly every property that matters when you sell. Density, corrosion behavior, recycling demand, and price per pound all line up on opposite sides of the iron-content line. The table below summarizes the contrast in plain numbers.
| Property | Ferrous metals | Non-ferrous metals |
| Iron content | Yes (main element) | No |
| Magnetic | Usually yes | No (except some nickel-bearing alloys) |
| Rust risk | High | Low to none |
| Weight | Generally heavier | Often lighter |
| Common examples | Carbon steel, cast iron, wrought iron | Copper, aluminum, brass, lead, zinc |
| Scrap price tier | Lower (sold by the ton) | Higher (sold by the pound) |
A practical takeaway: ferrous loads pay on volume, non-ferrous loads pay on grade. A truckload of mixed steel and a five-gallon bucket of clean copper wire can fetch comparable checks at the scale.
Learn about why non-ferrous metals pay more than steel scrap
Non-ferrous metals command higher prices because they’re rarer in the earth’s crust and harder to replace with new mining. Copper extraction is energy-intensive, and global demand keeps climbing thanks to electric vehicles, data centers, and renewable energy infrastructure. Recycled copper retains the same conductivity as virgin metal, which makes it indispensable for buyers in the supply chain.
Aluminum recycling consumes about 95% less energy than producing new aluminum from bauxite ore, according to the EPA. That energy gap translates straight into per-pound prices that beat steel by 5 to 10 times in most months. Steel scrap competes against an abundant global supply, which holds its market value low even when industrial demand runs strong.
Common non-ferrous metals in construction and demolition waste
Construction and demolition (C&D) jobs produce predictable streams of high-value scrap once you know where to look. Copper shows up as electrical wiring, plumbing pipe, HVAC tubing, and bus bars in electrical panels. Stripped bare wire grades higher than insulated, so plan separation time before loading.
Aluminum appears in window frames, storefront systems, roof flashing, gutters, and curtain wall panels. Brass sits inside valves, faucets, fittings, and decorative hardware. Stainless steel turns up in commercial kitchen equipment, handrails, and architectural cladding. Sorting these four streams before the trip to the yard pays better than dropping off one mixed load.
These are the South Florida scrap prices: ferrous vs. non-ferrous in real numbers
Current Miami market data shows the gap clearly. The average price for copper scrap in Miami sits around $1.87 per pound, with Bare Bright copper reaching $4.80 per pound. Aluminum averages roughly $0.62 per pound, brass $1.59 per pound, and stainless steel $0.33 per pound. Steel scrap, by contrast, trades by the hundredweight (cwt) at a small fraction of those numbers.
For a seller, the math is direct. One hundred pounds of clean Bare Bright copper at $4.80 returns roughly $480. One hundred pounds of mixed steel might return only a few dollars at current cwt rates. Same weight, drastically different checks. Sorting non-ferrous out of any mixed load is the single biggest decision affecting your payout.
Do General Metals buy ferrous and non-ferrous, or only non-ferrous?
General Metals buys both ferrous and non-ferrous scrap, but our specialty is non-ferrous. Decades of operating in Miami’s metal market have built our team’s grading expertise around copper, aluminum, brass, and stainless steel. That focus translates into faster inspections, accurate grading on the first pass, and pricing that reflects real-time market data instead of conservative averages.
If you’re hauling steel beams, rebar, or mixed iron, we’ll take the load. If you’re hauling a sorted pickup bed of copper, aluminum, brass, or stainless steel, you’re in our wheelhouse, and you’ll feel the difference at the scale. Knowing what is ferrous and non ferrous points you to where the money actually is.
Sell your non-ferrous scrap to Miami’s most experienced buyer. Drop by General Metals or call ahead for a same-day quote on your load.
