Low Alloy Steel Plate

(1) Low carbon: Due to the high requirements for toughness, weldability and cold formability, its carbon content does not exceed 0.20%; (2) Add manganese-based alloying elements; (3) Adding auxiliary elements such as niobium, titanium or vanadium: a small amount of niobium, titanium or vanadium forms fine carbides or carbonitrides in steel, which is beneficial to obtain fine ferrite grains and improve the strength and toughness of steel ; In addition, adding a small amount of copper (≤0.4%) and phosphorus (about 0.1%) can improve the corrosion resistance. Adding a small amount of rare earth elements can desulfurize and degas, purify steel, improve toughness and process performance.

Yield Strength	＞300MPa
Elongation	15%-20%
Impact toughness	＞600kJ/m~800kJ/m