A steel distributor in the Southeast added aluminum to their product line three years ago. Today, aluminum represents 15% of their revenue and 22% of their gross profit dollars. The higher margins on aluminum more than compensate for the smaller volumes. But the path from "let's add aluminum" to profitability took 18 months and required learning lessons that would have been cheaper to learn from someone else.
Why Aluminum Margins Are Higher
Aluminum distribution carries gross margins of 15% to 25%, compared to 6% to 12% for carbon steel. The reasons are structural. Aluminum alloy specifications are more complex (6061-T6, 5052-H32, 3003-H14, and dozens more, each with distinct properties), which creates a knowledge barrier that keeps casual competitors out. The customer base is more fragmented, reducing price transparency. And the processing requirements (careful handling to avoid scratching, precise cutting tolerances, clean packaging) justify premium pricing for distribution services.
The flip side: aluminum inventory is more expensive per ton ($3,000 to $6,000 per ton versus $600 to $1,200 for carbon steel), ties up more working capital, and carries higher obsolescence risk because the alloy-specific demand is harder to predict.
What Changes Operationally
You cannot handle aluminum the same way you handle steel. Aluminum scratches easily. A fork mark that would be invisible on an HRC coil is a reject on aluminum sheet. Your warehouse team needs to use padded fork covers, dedicated storage areas free from carbon steel dust (carbon steel particles embedded in aluminum surfaces cause galvanic corrosion), and protective packaging for shipment.
Processing equipment needs adjustment too. Slitting aluminum requires different knife clearances, lower tension, and often different separator materials than steel. Shearing aluminum requires sharper blades and adjusted ram speeds to avoid edge cracking, especially on harder tempers like T6. If you run aluminum on the same slitter or shear as carbon steel without proper changeover and cleaning, you will contaminate the aluminum with steel particles and create quality problems.
Inventory Complexity
Carbon steel inventory in a typical service center might span 50 to 100 SKUs across gauges, widths, and grades. Adding aluminum can double your SKU count because you need to stock multiple alloys (6061, 5052, 3003 as minimums), each in multiple tempers, thicknesses, and sheet sizes. A bare-bones aluminum inventory of the most common products ties up $300,000 to $500,000 in capital.
The risk of dead stock is higher with aluminum because the alloy-specific demand is harder to predict. You might stock 5052-H32 in 0.063-inch thickness because one customer uses it regularly. If that customer changes suppliers or changes their product design, that inventory sits until you find another buyer or sell it at a loss.
The Right Way to Start
Do not try to become a full-line aluminum distributor overnight. Start with the alloys and products your existing steel customers already buy from someone else. Ask your top 20 accounts: "Do you buy aluminum? What alloys, what forms, what quantities?" You will probably find that 30% to 40% of your steel customers also buy aluminum, and they would prefer to consolidate with one supplier if you could meet their aluminum needs.
Start with sheet and plate in the three most common alloys (6061, 5052, 3003). Stock the sizes and thicknesses your customers identified. Add extrusions and bar stock later as you build market knowledge and customer demand. Keep aluminum inventory lean for the first year and order from aluminum distributors who carry broader inventory (like Ryerson or Reliance subsidiaries) until your demand patterns stabilize enough to justify buying direct from mills.
The service centers that add aluminum successfully treat it as a separate business unit with its own inventory plan, handling procedures, and margin targets. The ones that fail treat it as "steel but lighter" and apply the same processes, the same margins, and the same casual handling. Aluminum rewards the operators who respect its differences.