Table 1.

Components of commercially pure titanium (cp-Ti) grades 1–4 [20]

Components (%)	ASTM grades
	1	2	3	4
Fe max.	0.20	0.30	0.30	0.50
C max.	0.10	0.10	0.10	0.10
O max.	0.18	0.25	0.35	0.40
N max.	0.03	0.03	0.05	0.05
H max.	0.015	0.015	0.015	0.015
Σ	0.525	0.695	0.865	1.065
Ti (%)	99.470	99.300	99.130	98.930

Fe iron, C carbon, O oxygen, N nitrogen, H hydrogen, Ti titanium