Mechanical Properties

Property		3.6	4.6	4.8	5.6	5.8	6.8	8.8		10.9	12.9
Property		3.6	4.6	4.8	5.6	5.8	6.8	<= 16mm	> 16mm	10.9	12.9
Tensile Strength R_m in MPa (N/mm²)	nominal value	300	400	400	500	500	600	800	800	1000	1200
Tensile Strength R_m in MPa (N/mm²)	minimum	330	400	420	500	520	600	800	830	1040	1220
Vickers Hardness HV=F 98N	minimum	95	120	130	155	160	190	230	255	310	372
Vickers Hardness HV=F 98N	maximum	220	220	220	220	220	250	300	336	382	434
Brinell Hardness HB F=30D²	minimum	90	114	124	147	152	181	219	242	295	353
Brinell Hardness HB F=30D²	maximum			209			238	285	319	363	412
Rockwell Hardness HR	minimum HRB	52	67	71	79	82	89
	minimum HRC							20	23	31	38
	maximum HRB	95	95	95	95	95
	maximum HRC							30	34	39	44
Surface Hardness HV 0.3	maximum							320	356	402	454
Yield Stress R_el in MPa(N/mm²)	nominal value	180	240	320	300	400	480
Yield Stress R_el in MPa(N/mm²)	minimum	190	240	340	300	420	480
0.2% elongation limit R_p0.2 in Mpa (N/mm²)	nominal value							640	640	900	1080
0.2% elongation limit R_p0.2 in Mpa (N/mm²)	minimum							640	660	940	1100
Test stress S_p	S_p/R_eL or R_p0.2	0.94	0.94	0.91	0.94	0.91	0.91	0.91	0.91	0.88	0.88
Test stress S_p	MPA (N/mm²)	180	225	310	280	380	440	580	600	830	970
Elongation after fracture A₅ in %	minimum	25	22	14	20	10	8	12	12	9	8
Minimum notch impact energy in Joules					25			30	30	20	15
Head Impact Toughness		No Fracture
Maximum Height of the Thread Zone Not Decarburized E								1/2H₁	1/2H₁	2/3H₁	3/4H₁
Maximum Depth of Decarburization Gmm								.015	.015	.015	.015

*All information is strictly informative