What are the primary materials used in structural steel fabrication?

The primary materials used in structural steel fabrication are carbon steel, stainless steel, and alloy steel due to their specific properties that make them ideal for construction applications.

Carbon steel is the most commonly used material in structural fabrication because of its high strength, versatility, and cost-effectiveness. It provides excellent tensile strength and is widely available, making it suitable for various structural applications such as beams, columns, and frames.

Stainless steel is another key material used in structural applications, valued for its corrosion resistance and aesthetic appeal. It is particularly beneficial in environments where exposure to moisture or chemicals could lead to rust or degradation, such as in coastal or industrial settings.

Alloy steel incorporates additional elements to enhance specific properties, such as increased strength, hardness, or toughness. These modifications allow alloy steels to meet the demands of specialized engineering designs and complex load requirements.

The other choices include materials that don't belong in the primary category of structural steel fabrication. Aluminum is a type of metal commonly used in construction, but it does not fall under the category of steel. Options including concrete, bamboo, fiberglass, wood, iron, and rubber also pertain to construction but are not primarily used in structural steel fabrication, as they serve different purposes in the industry.