Fe	Si	Cu	Mn	Mg	Zn	Cr	Zr+Ti	Other	Al
0,7	0,2-0,8	3,4-4,5	0,4-1,0	0,4-1,0	0,25	0,1	0,25	0,15	Remaining

Temper	Yield Strength (MPa) Min-Max	Tensile Strength (MPa) Min-Max	Elongation ( %50 )   Min-Max	Hardness  (HB)   Min-Max
0	70	180	-	45 - 50
T4	230 - 275	380 - 425	-	95 - 105

It has high mechanical strength and high fatigue strength, and its corrosion resistance increases with coating. It is used in structural components that require high strength.