Investigation on the Crack Initiation of V-Shaped Notch Tip in Precision Cropping

Table 1

Chemical compositions of 45 steel bar material.

Chemical compositions	Values
C/%	0.37~0.52
Mn/%	0.51~0.81
Si/%	0.28~0.48
S/%	0.01~0.029
P/%	0.017~0.044