What is the maximum carbon content allowed in A992 angle steel?

ASTM A992/A992M-22 limits carbon content in A992 angle steel to 0.23% max. Carbon enhances strength but poses risks at higher levels: it increases brittleness, reduces ductility, and impairs weldability by forming hard, crack-prone microstructures in the heat-affected zone (HAZ) during welding. A 0.23% cap balances strength and workability, allowing A992 angles to be welded via standard methods (SMAW, GMAW) without preheating- a key cost-saving feature for construction. To enforce this limit, manufacturers use spectroscopic analysis during steelmaking to monitor carbon levels in real time. Post-production, each batch is tested, with carbon content documented in the material certificate. This control ensures A992 retains fabrication flexibility while meeting strength requirements.