Evaluation of the Methods for Estimating the Fully Reversed Unnotched Fatigue Limits of Steels

Table 3

Monotonic deformation properties and fatigue limit of the selected steels from SAE J1099 [8].

Materials	E (GPa)	σy (MPa)	σu (MPa)	σf (MPa)	RA (%)	εf	HB	σL (MPa)
1008	207	234	331	587.5	77.5	1.49	86	92.7
1008	203	255	365	649.3	77.9	1.51	90	100.3
1010	203	200	331	597.1	80.4	1.63	83	116.9
1015	207	228	414	695.5	68	1.14	80	146.3
1020	203	262	441	713.5	61.8	0.96	109	143.9
1020	186	255	393	644.5	64	1.02	108	129.5
1025	207	306	547	889.4	62.6	0.98	158	197.8
1045	207	517	752	1082.9	44	0.58	225	291.1
1045	207	1689	1827	2758.8	51	0.71	500	690.3
1045	207	1862	2241	3159.8	41	0.53	595	728.5
1045	207	424	718	1062.6	48	0.65	192	227.9
1045	207	1729	1956	2705.1	38.3	0.48	500	756.9
1045	207	1275	1344	2137.0	59	0.89	390	512.6
10B21	197	999	1048	1756.4	67.6	1.13	318	482.7
10B21	203	806	834	NA	NA	NA	255	369.6
10B22	203	806	834	NA	NA	NA	255	450.7
15B27	203	772	847	1431.4	69	1.17	250	410.2
15B27	203	854	916	1525.1	66.5	1.09	264	451.2
4130	200	1358	1427	2207.6	54.7	0.79	366	549.4
4130	221	778	896	1499.0	67.3	1.12	259	412.6
4140	207	848	938	NA	NA	NA	293	473.1
4140	200	1895	2033	2439.6	20	0.22	475	663.5
4142	200	1447	1551	2280.0	47	0.63	400	528.2
4142	200	1860	1929	2642.7	37	0.46	450	597.0
4142	207	1378	1413	2091.2	48	0.65	380	547.9
4142	207	1584	1757	2494.9	42	0.54	450	643.1
4142	207	1722	1929	2604.2	35	0.43	475	667.2
4340	200	1371	1468	2027.3	38.1	0.48	409	540.3
4340	190	834	1048	NA	NA	NA	275	429.8
4340	193	634	827	1185.9	43.4	0.57	243	301.9
4340	207	1102	1171	1826.8	56	0.82	327	502.2
5160	203	1488	1584	2212.8	39.7	0.51	430	634.2
0030	207	303	496	724.2	46	0.62	137	196.5
0050A	209	415	787	936.5	19	0.21	192	211.9
0050A	209	402	583	734.6	26	0.30	174	200.7
0050A	211	542	702	NA	NA	NA	206	258.0
8630	207	985	1144	1475.8	29	0.34	305	334.6