Manganese (0.80-1.20% in many grades) enhances angle steel's strength and hardenability by forming solid solutions with iron and refining grain structure. It counteracts sulfur's brittleness by forming manganese sulfides, improving hot workability. Excessive manganese (>1,5%) võib suurendada rabedust, eriti madala - temperatuurikeskkonnas, nii et enamik standardeid piirab selle sisu, et optimeerida sitkust ja masinaid.