Average radius (R_p) and number density (N_v) of Cu precipitates in Fe–Cu and Fe–Cu–Mn alloys.

	R p (nm)		N v (×1023 m−3)
	Fe–Cu	Fe–Cu–Mn	Fe–Cu	Fe–Cu–Mn
0.25 h	1.0 ± 0.3	1.0 ± 0.3	1.2	4.9
1 h	1.0 ± 0.4	1.0 ± 0.5	8.1	8.8
2 h	1.1 ± 0.3	1.3 ± 0.6	17.4	5.7
16 h	2.1 ± 0.8	3.7 ± 0.9	2.2	0.6