Table 2. The element characteristics of hafnium nitride-coated titanium screws with their line type, apparent concentration, k ratio, weight percentage, standard label, and factory label .

Element	Line Type	Apparent Concentration	k Ratio	wt%	wt% sigma	Standard Label	Factory Standard
Ti	K Series	7.34	0.07336	30.26	0.28	Ti	Yes
O		2.70	0.00910	35.84	0.47	SiO2
Al		0.19	0.00138	1.31	0.06	Al2O3
C		0.26	0.00264	6.49	0.45	C
V		0.40	0.00401	1.64	0.09	V
Hf		4.99	0.04987	24.46	0.29	Hf