It is made of hot-rolled mild steel and is usually manufactured to ASTM 36 dimensional specifications. They are put through extra inline fabrication using modern machinery after being hot-rolled for more preciseness. These channels can be cut or drilled according to given specifications.
The steel grade used to manufacture channels has certain physical properties that allow easy welding.
The toughness property of steel ensures zero breakage even when it gets deformed.
Steel channels are always galvanized or coated after fabrication to ensure they become resistant to any kind of corrosion.