ASTM A529-50 carbon steel channel is stronger than common A36 steel channel for A529-50 is carbon-manganese steel. A529-50 has 50 ksi yield strength which reduces weight for the same strength. Hence, it is ideal for application where requires higher strength.

ASTM A529-50 galvanised steel channel

A529-50 steel channel types:

Surface treatments: black (non-treatment), hot-dip galvanized, primed.
A529-50 galvanized steel channel effectively resist corrosion from environments. The amount of zinc coating is customized according to your actual requirements. As to primed steel channel, it owns better corrosive resistance than zinc coating.