High-strength steel is made more durable by adding alloys during the manufacturing process. It's usually more expensive than carbon steel and requires special welding techniques.

Weathering steel (also known as corten steel) is a high-strength, low-alloy product manufactured specifically to withstand atmospheric conditions. The anti-corrosive properties of weathering steel extend bridge life to 100 years and beyond.

Heat-treated carbon steels are the strongest available. The higher strength is the result of exposure to extreme heat.