weathering steel

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weathering steel

A high-strength, low-alloy steel that forms an oxide coating when exposed to rain or moisture, which adheres to the base metal and protects it from further corrosion. See also: Metal
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A pedestrian died when he was struck by a mini-bus in the accident on the A588 road.
Originally, the material was available under ASTM Specification A588. For highway bridge applications, it is now covered by ASTM Specification A709, Grade 50W or AASHTO Specification M270, Grade 50W.