Oak is generally more expensive than aluminum alloy. This is due to several factors, including the rarity and quality of the wood, as well as the processing and finishing required to create finished oak products. According to the American Hardwood Export Council, the average price per board foot of oak can range from $3 to $8, depending on the grade and type of oak. In contrast, aluminum alloy prices can vary widely but typically range from $1.50 to $5 per pound, which translates to approximately $3 to $10 per square foot for common aluminum alloy sheets.

The cost of oak is influenced by factors such as the tree's age, the quality of the wood, and the specific species of oak. For example, red oak is often less expensive than white oak due to its abundance and lower demand. Additionally, the process of sawing, drying, and finishing oak to create a high-quality product adds to its cost. Oak is also valued for its durability, aesthetic appeal, and ability to be stained or painted, making it a popular choice for furniture, flooring, and cabinetry.

On the other hand, aluminum alloy is a metal that is widely available and can be easily processed into various forms. Its cost is influenced by factors such as the type of alloy, the thickness of the material, and the market demand. Aluminum is also recyclable, which can make it more cost-effective in the long run. However, the initial cost of aluminum alloy is generally lower than that of oak due to its lower processing requirements and abundance.

In summary, oak is typically more expensive than aluminum alloy due to the wood's rarity, quality, and processing requirements. While aluminum alloy is more cost-effective in terms of raw material and processing, the aesthetic and functional benefits of oak often justify its higher price.