(1) Low Carbon: As toughness, weldability and cold formability requirements of high carbon content not exceeding 0.20%.
(2) was added to the manganese-based alloy elements.
(3) by adding niobium, titanium or vanadium add elements: a small amount of niobium, titanium or vanadium carbide or form fine carbonitrides in steel beneficial to obtain fine ferrite grains and improve the strength and toughness of steel ʱ??
In addition, adding a small amount of copper (≤0.4%) and phosphorus (0.1%), etc., can improve the corrosion resistance. Adding a small amount of rare earth elements, you can desulfurization, degassing, make steel purification, improve toughness and process performance.