The question of the content of non-ferrous metals in household appliances often arises among those who plan to recycle an old unit or are engaged in professional repairs. Aluminum plays a key role in the design of the refrigerator, ensuring effective heat exchange, however, its quantity is not fixed and depends on the year of manufacture and model of the device. Modern environmental standards and production economics dictate their own rules for the use of materials, which directly affects the final weight of the scrap being handed over.
To accurately understand what exactly you are handing over, it is necessary to consider the internal structure of the unit. Weight aluminum alloy can vary from several hundred grams to 3-4 kilograms in large two-chamber models. It is important to distinguish between pure metal and alloys, and also to understand where exactly it is located so as not to confuse it with steel or copper when sorting.
Main sources of aluminum in construction
The main consumer of this metal in a refrigeration unit is heat exchange equipment. This is where high thermal conductivity is required, for which aluminumis famous. In older Soviet-made models, evaporators were often made of zinc-coated steel, but since the 90s, the industry has massively switched to lighter and more efficient materials.
The second significant area is the refrigerant circulation system. The tubes connecting the compressor to the condenser and evaporator can be made of copper, but in budget segments they actively use aluminum tube with internal copper coating or all-aluminum lines. This significantly reduces the cost, but requires care during repairs, since soldering such connections is more difficult.
It is also worth mentioning internal elements such as shelves, vegetable trays and decorative panels. Although they occupy a larger volume, their weight is relatively light compared to metal cooling system components. However, with total recycling, every gram matters for the final mass.
Evaporator: where the main weight is hidden
The most massive part aluminum is concentrated in the evaporator. In No Frost systems, this is a hidden element located behind the back wall of the freezer. It is a coil, often soldered onto an aluminum plate or enclosed in an aluminum housing for better cold transfer.
In models with a drip defrosting system, the evaporator can be made in the form of a sheet into which a pipeline is embedded. The weight of such a part in an average two-chamber refrigerator ranges from 1.5 to 2.5 kilograms. This is the most valuable part for non-ferrous scrap collectors inside the unit.
- 🧊 The freezer evaporator is the heaviest aluminum assembly.
- ❄️ The refrigeration compartment evaporator (in two-compressor models) - adds another 0.5-1 kg.
- 🔩 Fasteners elements and heat sink plates - about 200–300 grams.
It is worth noting that some modern inverter models manufacturers are experimenting with composite materials, but aluminum still remains the de facto standard for effective cooling. When disassembling, it is important not to damage the tubes if you plan to reuse them, although integrity does not matter for scrap.
Condenser and pipelines
The capacitor, which in everyday life is often called the “grid” on the back wall, also contains non-ferrous metals. In most modern refrigerators, this is a steel grille with varnish applied, but inside tubes or as fins it can be used aluminum. However, unlike the evaporator, here its quantity is minimal.
Pipelines connecting the system are a risk area when determining the metal. Visually aluminum tube it is often covered with insulation, and it is difficult to distinguish it from copper without a cut or a magnet. Copper is weakly magnetic, but has a characteristic reddish tint when cut, while aluminum is silvery and light.
⚠️ Attention: When trying to remove the pipelines yourself, remember that refrigerant may remain in the system. Although modern freons (R600a) are not toxic in small doses, they are flammable. Do not use open fire to heat soldering areas without prior ventilation and gas removal.
The weight of aluminum elements in the capacitor group usually does not exceed 300-500 grams. The main mass here is the steel of the supporting structure of the grid. Therefore, when assessing scrap, you should focus specifically on the evaporation unit.
The influence of the year of manufacture on the metal content
The chronology of refrigerator production directly correlates with the amount used aluminum. Between 1970 and 1990, manufacturers emphasized durability and repairability by using thick-walled steel evaporators and copper tubing. There was a minimum of aluminum in them, mainly in the form of cast parts for compressors or decorative elements.
With the onset of the 2000s, the situation changed. Global cost optimization led to the introduction aluminum alloys into the cooling system. This made it possible to reduce the weight of the units and simplify production. Therefore, a refrigerator released in 2010 will contain many times more aluminum than an analogue produced in 1985.
Below is a table showing the approximate distribution of the weight of non-ferrous metals depending on the era of production:
| Production period | Main material of the evaporator | Approximate weight of aluminum (kg) | Approximate weight of copper (kg) |
|---|---|---|---|
| 1970–1990 | Steel / Copper | 0.2 – 0.5 | 1.5 – 2.5 |
| 1995–2005 | Aluminum / Steel | 1.0 – 1.5 | 0.8 – 1.2 |
| 2010–2020 | Aluminium | 2.0 – 3.0 | 0.3 – 0.6 |
| 2021–2026 | Aluminum alloys | 1.5 – 2.5 | 0.2 – 0.4 |
The data in the table are averaged and may differ depending on the brand and specific series. For example, premium models can retain copper circuits for increased reliability, while the mass market has completely switched to aluminum.
Why is there less copper in modern refrigerators?
Manufacturers are replacing copper with aluminum due to the high cost of the first metal and the risk of theft. Aluminum is cheaper, lighter and less attractive to scrap dealers, which reduces the likelihood of equipment theft for the sake of metal.
Compressor: hidden reserves
The compressor itself, which is the “heart” of the refrigerator, also contains non-ferrous metals, but getting to them is extremely difficult. The windings of the electric motor inside the hermetically sealed casing are made of copper wire, however, the housing and valve groups are often made of steel and aluminum alloys.
The weight of aluminum parts in the compressor (pistons in some models, valve covers) is no more than 200-400 grams. Removing them for scrap is not economically feasible, since the cost of cutting the steel casing and operating time will exceed the cost of the resulting metal.
In addition, there is oil inside the compressor, which must be drained before disposal. This adds another stage of preparation, making disassembling the compressor unattractive for the DIYer.
- 🔨 The compressor housing is predominantly steel.
- ⚙️ Valve group - may contain brass or aluminum.
- 🌀 Piston (in piston models) - often aluminum or steel.
For most users, the compressor is of interest as a solid unit for ferrous metal or as a source of copper (windings), but not as a source of aluminum.
⚠️ Attention: Never try to cut the compressor housing with a grinder if there is oil or refrigerant vapor left inside. A spark can ignite oil vapors. Before opening (if at all necessary), the compressor must be carefully opened at the bottom, allowed to drain the oil and rinsed thoroughly.
How to distinguish aluminum from other metals
When sorting scrap, it is important not to mix metals, since their prices vary. Aluminium has a number of characteristic features. Firstly, it is much lighter than steel and copper. If you lift a tube or plate and it seems suspiciously light for its size, this is a sure sign of aluminum.
Secondly, color. When freshly cut or where the insulation is damaged, aluminum has a bright silver, almost white shine. Copper is reddish-pink, and steel is gray, often with signs of rust if not covered with a protective layer.
The third method is a magnet. Aluminum is not magnetic. If the tube or part does not respond to a magnet, it may be copper, aluminum, brass or stainless steel. Use weight and color to clarify. You can also conduct a hardness test: aluminum is softer than steel, but harder than lead, it easily leaves dents from an impact.
☑️ Checking the metal before delivery
Economic feasibility of disassembly
Is it worth disassembling the refrigerator for aluminum? The answer depends on your goals and scope. If you have one old unit, the time spent on complete disassembly, removing plastic, unscrewing the evaporator and stripping the metal may not be worth it. The cost of 2-3 kilograms of aluminum at current scrap prices is often equivalent to the cost of movers to remove the refrigerator or even lower.
However, if you are doing this professionally or you have accumulated a batch of 5-10 refrigerators, then extracting aluminum from evaporators becomes a profitable activity. Sorted non-ferrous metal is accepted much more readily and more expensively than mixed scrap.
It is important to consider that modern refrigerators are becoming more and more monolithic. Manufacturers foam evaporators directly into the housing, which makes their removal a labor-intensive process that requires violating the integrity of the cabinet. In such cases, mining aluminum alloy turns into dirty and difficult work.
Often asked questions (FAQ)
Is it possible to determine the amount of aluminum by marking a refrigerator?
It is impossible to determine the exact amount of metal by marking. The marking (model, serial number) indicates the volume of the chambers, energy consumption class and year of manufacture, but not the chemical composition of the parts. However, knowing the year of manufacture, we can approximately guess whether aluminum was used in the evaporator.
What is more valuable in a refrigerator: aluminum or copper?
Of course, copper is valued much higher on the scrap market (3-5 times more expensive than aluminum). However, a modern refrigerator contains less copper than aluminum. The main value of the unit for scrapping is the combination of a steel body and a small amount of non-ferrous metals.
Is an aluminum evaporator harmful to health?
No, aluminum in the design of the evaporator it is absolutely safe. It is located in a closed circuit or outside the food chambers (in the No Frost system) and does not come into contact with food. Even in older models, where the evaporator was inside the chamber, it was coated with food-grade varnish or tin, preventing oxidation.
Do they accept entire refrigerators or do you only need to carry metal?
Scrap collection points most often accept entire refrigerators, but rate them as “scrap” ferrous metals" with a deduction of the weight of plastic and non-metallic inclusions, or at a low rate. To get the price of non-ferrous metal, you need to dismantle the aluminum and copper components yourself.