What are hollow metal doors made of?

Hollow metal doors are typically made of steel. The doors consist of a steel frame that surrounds one or more steel panels. The panels may be flat or have raised patterns, and can be filled with a variety of materials, such as honeycomb or polystyrene foam, to improve insulation and soundproofing.

The steel used in hollow metal doors is typically cold-rolled, which means it has been processed at low temperatures to increase its strength and durability. The steel is also coated with a rust-inhibiting primer to prevent corrosion.

Hollow metal doors are known for their strength and durability, making them a popular choice for commercial and industrial applications where security and longevity are important factors. They are also fire-resistant and can be customized with various hardware and finishes to suit a variety of design and functional needs.

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