Transformation of M/A Constituents during Tempering and Its Effects on Impact Toughness of Weld Metals for X80 Hot Bends

Table 1

Chemical composition of the weld metal for hot bends (wt.%).

Hot bends	C	Si	Mn	P	S	Ni	Cr + Mo + Cu	Ti	Nb	V
Bend A	0.07	0.27	1.60	0.010	0.004	0.16	0.41	0.016	0.032	0.03
Bend B	0.06	0.29	1.67	0.016	0.004	0.31	0.37	0.016	0.034	0.01
Bend C	0.06	0.28	1.67	0.019	0.005	0.52	0.39	0.015	0.036	0.01