Low alloy steel properties

(1) High strength: Generally, its yield strength is above 300MPa;
(2) High toughness: requires an elongation rate of 15% to 20%, and a room temperature impact toughness greater than 600kJ/m to 800kJ/m. For large welded components, high fracture toughness is also required;
(3) Good welding performance and cold forming performance;
(4) Low cold brittle transition temperature;
(5) Good corrosion resistance.