Copper Bearing Steel

[drax]

Does anyone know what percentage of copper denotes a "Copper Bearing Steel". Is there a standard? what effect does the copper have on corrosion properties or strength?

thanks

 

[Carburize]

One of the "classic" copper bearing steels is CORTEN which had 0.25 - about 0.50% added copper depending on the grade. Used for structural applications these steels have about 3X the atmospheric corrosion resistance as mild steels.

 

[metengr]

Here is some added information on copper additions to steel alloys;

http://www.shieldalloy.com/copperpage.html