Effects of the Addition of Nb and V on the Microstructural Evolution and Hydrogen Embrittlement Resistance of High Strength Martensitic Steels

Table 1

Chemical compositions of four kinds of tested steel (wt. %).

No.	C	Si	Mn	Cr	Cu	Ti	V	Nb
1#	0.23	0.22	1.2	0.2	0.01	0.03	0.001	0.003
2#	0.23	0.22	1.2	0.2	0.01	0.03	0.025	0.003
3#	0.23	0.22	1.2	0.2	0.01	0.03	0.001	0.035
4#	0.23	0.22	1.2	0.2	0.01	0.03	0.025	0.035