Table 1.

Chemical composition of X80 pipeline steel (wt.%).

C	Si	Mn	P	S	Al	V
0.0699	0.177	1.642	≤0.085	≤0.0018	0.268	0.0254
Nb	Ti	Cr	Mo	Ni	Cu	H
0.0495	0.0124	0.085	0.195	0.255	0.14	≤2.5 ppm