Yes, many cat food cans use aluminum, while others use steel; a simple magnet test tells you which metal you have.
Shoppers see the same small pull-tab tins across brands, yet the metal under the label isn’t always the same. Some lines pack wet recipes in lightweight aluminum. Others use sturdy tinplate steel that tolerates the heat of retorting. Knowing what you’re holding matters for storage, opening feel, and recycling. This guide breaks down the metals used, why makers choose each one, and easy ways to identify the can at home.
Aluminum And Steel In Pet Food Packaging
Metal cans for pets fall into two broad camps: aluminum bodies and tin-coated steel. Both survive retort cooking, seal well, and keep food shelf-stable for years. Aluminum resists corrosion and sheds weight, which helps freight efficiency. Steel brings high strength and dent resistance, which protects product during transport and stacking.
Across the category, aluminum shows up a lot in smaller portions that match feline feeding habits. Steel appears across sizes, especially in larger formats. Real-world can lines mix both metals depending on price, supply, and filling equipment. That’s why two similar-looking tins from different brands can behave differently when you pull the tab.
Quick Reference: What’s In The Can?
Use this table as a fast orientation before we dig into details. It captures the most common pairings shoppers encounter on shelves.
| Container Type | Typical Metal | At-Home ID Tip |
|---|---|---|
| 3–3.5 oz pull-tab tin | Often aluminum | Magnet won’t stick |
| 5.5 oz pull-tab tin | Aluminum or steel | Test with a magnet |
| Large dog-size tin (12–13.2 oz) | Commonly steel | Magnet sticks |
Why Makers Choose One Metal Or The Other
Heat processing puts stress on packaging. Steel tolerates pressure swings, knocks, and high stacking loads. That’s helpful on tall pallets and in warehouses. Aluminum fights rust and keeps weight low, shaving grams per unit and fuel across a truckload. Both accept food-safe linings that keep recipes stable and tasty.
Cost, Supply, And Equipment
Production lines are tuned to one body metal. Tooling, seam rollers, and retort racks lock brands into specific formats. When metal markets move, some recipes shift can sizes or metals to stay on shelf. That’s normal. It’s also why two flavors in the same brand can land in different metals during supply crunches.
Consumer Experience
Pull-tab feel varies by metal and lid spec. Aluminum bodies often feel lighter in hand and pop with less effort. Steel bodies feel firmer, which reduces rim distortion when clumsy openings happen. Neither choice changes nutrition or safety by itself; lining quality and plant controls do that work.
How To Tell If A Tin Is Aluminum Or Steel
Skip guesswork. Use quick checks at home to identify the metal in seconds.
Magnet Test
Grab a fridge magnet. Touch it to the sidewall. No attraction signals aluminum. A strong pull signals steel. Run the magnet over the lid and base too; mixed-metal setups exist, so check all three areas before sorting your recycling.
Weight And Sound
Aluminum cans feel airy. They ping with a softer note when tapped. Steel feels denser and rings with a brighter clink. This signal helps when you don’t have a magnet handy, though it’s less foolproof than the magnet check.
Label Cues
Some brands print the metal type on the label or add the Steel Recycles or aluminum recycle marks. If the print mentions tinplate, you’re holding steel. If it references Al or an aluminum icon, that’s your cue for the lighter metal.
Recycling Realities For Pet Food Tins
Both metals are in demand at scrap yards and material recovery facilities. Municipal rules vary, yet two prep steps boost your odds of perfect sorting: rinse out residues, and tuck the loose lid inside the body so it doesn’t vanish through screens. Many programs accept labels left on, since paper burns off in furnaces.
Why care? Aluminum retains value cycle after cycle, and remelting it saves energy compared with fresh metal. Steel also recycles easily and often contains recycled content from the start. Together, these properties make metal tins a strong packaging choice for circularity.
Prep Checklist
- Empty and quick-rinse the can.
- Drop the loose lid inside the body and crimp lightly.
- Leave the paper label unless your program says otherwise.
- Sort by metal if your city asks for it; the magnet test helps.
Aluminum In Pet Food Cans — What’s Typical Today
Industry groups and can makers report a split between the two metals across pet categories. Smaller feline portions lean toward aluminum bodies, while big dog tins still skew steel. Broadly cited estimates peg the market near a three-to-one ratio in favor of aluminum for cat formats, with steel covering much of the big-can segment. Trade releases from can makers and the pet sector mention these ratios when talking about tariffs and recycling rates.
One recurring estimate comes from trade communications that attribute a large share of small cat tins to aluminum bodies. You can see this split described in Can Manufacturers Institute data shared through an industry news brief, which cites a majority of cat formats in aluminum and a smaller slice in steel.
These numbers shift by year and region based on metal prices and supply. They also vary by brand strategy. Premium lines often favor a sleeker, lighter feel that aligns with aluminum. Value lines may choose steel to control dents across long logistics legs. Neither choice signals quality of the recipe inside.
When steel shows up, it isn’t random. The Pet Food Institute explains that canned recipes depend on quality tinplate steel to handle retort conditions and protect seams.
Why The Magnet Test Still Matters
Shelf displays change faster than printed guides. A quick magnet sweep gives you a live answer for that exact tin. It also prevents mixed loads at drop-off centers that ask for separate streams.
Food Safety And Liners
Modern cans use protective linings that keep food from touching bare metal. These coatings handle heat, protect flavor, and prevent corrosion. Many brands use BPA-NI systems, and plants validate that heat cycles cure the lining properly. The body metal doesn’t change these lining rules; both aluminum and steel cans rely on them.
Heat Processing In Short
Wet recipes are sealed and then cooked in the can. High heat kills microbes and locks in shelf life. The cycle puts pressure on seams and walls, which is why strength and can spec matter. Retort math and quality checks make sure lids don’t buckle and seams hold tight, no matter which body metal was used.
Practical Buying And Storage Tips
Shop by your cat’s portion size and the plant quality behind the brand. If you prefer lighter trash weight and quick-crush recycling, aluminum tins feel great. If your pantry crushes stacks or you buy by the case, steel’s stiffness can be handy. Both store well away from humidity and salt air.
At-Home ID And Sorting Table
Keep this table handy near your bin. It pairs real-world cues with the right next step so you place each can in the best stream.
| What You See | Likely Metal | Next Step |
|---|---|---|
| Magnet doesn’t stick to body | Aluminum | Rinse; tuck lid; recycle with cans |
| Magnet sticks to body | Steel | Rinse; tuck lid; recycle with metal |
| Light feel, softer ping | Aluminum | Confirm with magnet when unsure |
| Firm walls, bright ring | Steel | Confirm with magnet when unsure |
Common Questions People Ask Themselves While Sorting
Do Small Tins Always Use One Metal?
No. Small sizes often lean aluminum, yet supply swings and plant setups can flip that choice. Always check your exact can.
Do Lids Match The Body?
Not always. Some lines use easy-open steel lids on aluminum bodies or the other way around. If you’re sorting by metal, test both parts.
Do Labels Need Removal?
Usually no. Many programs remove them in processing. If your curbside guide asks you to strip paper, peel and recycle the can anyway.
Sourcing And Reliability
Trade groups that watch this market point to both metals being common in pet cans. Statements from can makers and the pet sector cite a large share of aluminum in cat formats and strong use of tinplate in bigger tins. These sources also echo best practices for recycling, like rinsing and nesting lids to keep them in the stream.
For policy or market shifts, keep an eye on industry updates and your local program’s list. If a material change affects cans in your area, the magnet test keeps you right either way.
Opening Feel, Lid Types, and Safety
Easy-open ends vary by gauge and score. Lighter bodies open with a softer pull; stiffer bodies resist at first, then peel smoothly. Pull away from your face and watch sharp edges. If a tab snaps, use a manual opener and discard the lid safely.
Bulging Or Dented Cans
Skip any tin with a domed end, leaking seam, or a deep crease through the double seam. That damage can break the sterile seal. Return it to the store or contact the brand with a lot code. Small dents away from seams are usually fine; folds across seams are a no-go.
Energy And Material Footprint In Brief
Every metal cycle saves resources when cans land in the right stream. Re-melting aluminum uses much less energy than making fresh ingot. Steel mills recover value by feeding cans into furnaces. Clean, sorted cans help; tuck lids inside so they don’t slip past screens.
Scrap And Curbside Tips
Many curbside programs accept metal in mixed recycling. Some drop-offs ask you to sort aluminum from steel. Scrap yards may pay by the pound; bag metals separately. Shelters sometimes collect small tins; the magnet sort helps volunteers.