Cold-rolled, hot-rolled steel coil for raw material, after acid pickling to remove oxide skin in cold rolling
Chemical composition (melting analysis)%
C 0.1
Si 0.5
Mn 1.0
P 0.1
S 0.030
Al min 0.015
Mechanical properties (Mpa).
Yield point 260-320
Tensile strength 360-440
Elongation at break 29