Table 2.

R_a values (%) of the Cr–Mn–Ni–N–Cu austenitic stainless steel samples under different heat treatment conditions after the DL-EPR test.

Temperature (°C)	Ra value (%)
	10 min	30 min	60 min	120 min	300 min
900	0.70 ± 0.11	0.61 ± 0.14	0.80 ± 0.24	0.85 ± 0.17	0.75 ± 0.14
850	0.70 ± 0.01	0.76 ± 0.07	0.56 ± 0.10	0.33 ± 0.14	0.61 ± 0.12
800	0.47 ± 0.05	0.75 ± 0.17	3.55 ± 0.63	0.39 ± 0.08	1.90 ± 0.82
750	6.48 ± 0.05	19.87 ± 0.94	19.36 ± 0.11	31.30 ± 2.14	34.89 ± 1.64
700	5.97 ± 0.32	14.98 ± 0.95	20.00 ± 1.10	33.12 ± 2.37	39.97 ± 0.10
650	0.39 ± 0.13	1.68 ± 0.05	8.74 ± 0.27	19.48 ± 0.02	25.40 ± 0.47
600	0.42 ± 0.11	0.22 ± 0.05	0.22 ± 0.05	0.13 ± 0.04	1.73 ± 0.19