Weather resistant steel is a family of low-carbon alloy steels composed of various grades. Some grades are proprietary grades, such as
Corten A or Corten B steel. It is similar to
ASTM A242 steel and A 588 classifications.
When to use weather resistant steel?Because weathering steel can be more durable than ordinary carbon steel under outdoor conditions, it is often used for bare steel structures. This eliminates the need for continuous recoating and recoating of steel. Examples include construction and bridge construction. The protective anti-rust coating sufficiently reduces the rate of corrosion, so that when the amount of corrosion is considered unsafe, the structure has exceeded its design life due to other reasons.
Weather resistant steel should not be used because its corrosion resistance cannot withstand these conditions in some environments. Weather resistant steel should not be used in an environment with high chlorine content, because the protective anti-rust layer will not be able to withstand the large amount of corrosive substances present in a chlorine-rich environment. This may cause premature failure. Weather resistant steel should not be used in applications that may cause galvanic corrosion or corrosion caused by extreme pH values.
