How to Prepare Your Scrap Metal for the Best Price

Most people think the work is done once they’ve collected their scrap. In reality, what happens before you show up at the scale is often the biggest factor in how much you walk away with. Knowing how to prepare your scrap — how to sort it, clean it, and present it — can make a meaningful difference in your payout. 

In this guide, we walk you through the essentials — starting with how to identify what you have, all the way to the finishing touches that can meaningfully boost what you earn at the scale.

Why Preparation Matters More Than You Think

When scrap arrives at a recycling facility already sorted and clean, it can move directly into the appropriate recycling stream. When it arrives mixed and contaminated, someone has to sort it first — and that extra work comes out of your price.

“If you don’t prepare scrap metal before recycling drop-off, you risk lower pricing, rejected materials, and longer processing times. Most rejections are caused by contamination — such as oil, plastic, or insulation — and mixed or improperly sorted metals, which increase handling costs for processors and result in pricing penalties in the form of grade downgrades.”— Miller Recycling, Facility Checklist

The numbers are significant. Sorting your scrap metal can increase your returns by 20 to 40 percent compared to mixed scrap. Facilities offer better rates for materials that arrive ready to process — it saves them time and delivers cleaner output. The gap between a sorted load and a mixed one isn’t trivial; it’s the difference between walking out with the full value of what you brought in versus a fraction of it.

Step One: The Magnet Test — Your Most Important Tool

Before anything else, you need to know what you have. The single most useful tool in scrap preparation costs almost nothing: a simple magnet.

Ferrous metals contain iron as their primary component and will attract a magnet. Non-ferrous metals do not contain iron and will not attract a magnet. They are highly valued in the recycling industry for their exceptional properties including corrosion resistance, conductivity, and malleability, and can be recycled repeatedly without degrading their properties.

This distinction matters because ferrous and non-ferrous metals are priced completely differently. Ferrous scrap is generally priced by the ton rather than by the pound, while non-ferrous metals — copper, aluminum, brass, bronze, and lead — typically command premium prices due to their industrial demand and specific properties. Running a magnet across your pile before you load the truck is the fastest way to know what you’re working with.

At Scrap City, we accept a full range of both ferrous and non-ferrous materials. The more clearly separated they arrive, the faster we can process your load and the better price we can offer.

How to Separate Metals: A Practical Guide

Once you’ve done the basic ferrous/non-ferrous split, the next step is to sort within each category. For non-ferrous metals — the ones that typically earn the most — separation by type is where serious value is unlocked.

The Institute of Scrap Recycling Industries (ISRI), the leading trade authority for the recycling industry in the United States, maintains detailed grading specifications for every major metal type. These grades exist because purity directly determines price.

“Copper is graded into several categories: Bare Bright Copper is the highest grade, consisting of clean, uncoated, and unalloyed copper wire; No. 1 Copper is clean, uncoated copper pipe or wire free of solder or paint; and No. 2 Copper is copper with minimal contamination such as solder, paint, or oil. Aluminum grades similarly include clean aluminum, painted aluminum, and dirty aluminum with significant contamination.” — ISRI / Okon Recycling Grading Guide

For a homeowner, contractor, or mechanic sorting their materials before a drop-off, this translates into a few practical actions: keep your copper separate from your aluminum; keep your brass in its own container; don’t throw insulated wire in with clean pipe. Each time you mix categories, you push everything down toward the lowest common grade — and the lowest common price.

Separation tips

• Copper: Separate bare bright, No. 1, and No. 2. Remove solder, paint, or iron attachments wherever possible.
• Aluminum: Keep each form separate — clean sheet, cast pieces, extruded profiles, and painted material all carry different values and should never travel in the same container.
• Brass: Keep yellow brass and red brass separate, and remove plastic or rubber fittings.
• Stainless Steel: Use your magnet here too — if it sticks, it won’t qualify as premium stainless. True high-value stainless is non-magnetic, so keep it free of regular steel contamination.
• Lead: Keep lead-acid batteries, soft lead, and wheel weights in separate containers.

Should I Clean the Scrap? What “Clean” Actually Means

This is one of the most common questions we hear, and the answer is yes — but “cleaning” in the scrap world doesn’t mean washing metal with soap and water. It means removing non-metal attachments and contaminants that degrade the grade of your material.

“Clean metals are those that are free from attachments or mixed materials that lower their grade. Removing steel screws, bolts, or iron attachments from aluminum or copper pieces allows you to present them as clean non-ferrous metals, which command a higher price per pound. If the iron remains attached, your material will likely be classified as “irony” and valued lower, since the buyer must estimate the amount of non-ferrous metal after processing.”— Taylor’s Junkyard / P&T Metals Industry Guide

For copper wire in particular, stripping the insulation can increase value by 30 to 50 percent. That’s a substantial return for a modest amount of work, especially if you’re bringing in significant volume. Cutting large pieces of metal into smaller, manageable sizes is also helpful — it makes transportation easier and helps recyclers evaluate your load quickly.

That said, you don’t need to obsess over every surface. Scrap does not need to be spotless, but it should not be heavily contaminated. Dirt, liquids, and debris can affect grading and slow down processing. The goal is to remove what you reasonably can — plastic, rubber, wood, iron attachments — without turning preparation into a full-time job.

Common Mistakes That Cost You Money

Even experienced scrappers leave value on the table by making a few avoidable mistakes. The most common one is mixing everything together for convenience. It feels faster, but a mixed load means the recycler has to do the sorting — and that cost is passed back to you through lower per-pound rates.

Another frequent issue is not recognizing the metal you have. The ISRI grading standards used throughout the U.S. industry set precise thresholds for purity and contamination at every grade level. Not every recycler will take the time to explain grades to a walk-in customer. If you’re not sure whether a piece of copper qualifies as No. 1 or No. 2, ask — at Scrap City, our team will give you a straight answer and help you understand how your material is being evaluated.

A third mistake is selling too small. Larger quantities generally command better per-pound rates. If you’re a contractor or professional who generates regular scrap, holding it until you have a meaningful quantity will almost always yield better results than frequent small trips.

Storing Your Scrap While You Accumulate

How you store scrap between collection and drop-off also affects its condition and therefore its value. Storing scrap metal in a dry, covered area protects it from rain and moisture — exposure to the elements can cause metals to degrade, rust, or become contaminated, reducing their worth. A rusted piece of steel is worth less than a clean one.

Use separate, labeled containers for different metal types so they don’t mix during handling. Some practical pointers for organized storage:

1. Use bins or barrels large enough to hold your volume — one per metal type.
2. Label each container clearly: Copper, Aluminum, Brass, Steel, Lead, etc.
3. Store on a dry, level surface away from rain and moisture.
4. Don’t stack containers where the weight could cause spills or mixing.
5. If you’re a facility generating consistent volume, ask Scrap City about container solutions.

When to Sell: Timing and the Market

Preparation affects your price — but so does timing. Metal prices are tied to global commodity markets and fluctuate regularly. Tools like the iScrap App (iscrapapp.com) give a reasonable national benchmark, though local prices at certified yards like Scrap City may differ based on regional demand, volume, and material quality.

The practical guidance is to stay loosely aware of price trends for the metals you generate most, and to bring in larger loads rather than small ones to capture both better rates and lower transportation costs per pound. For industrial clients and contractors, Scrap City can also discuss pickup scheduling and container services — call us at (+1) 954 330 9472 to talk through your options.

Ready to Get the Best Price for Your Scrap? Bring your sorted metals to Scrap City — we’ll weigh them on state-certified scales and pay you on the spot. Two convenient locations in South Florida, over 50 years of experience, and a team that treats you right.