Name: Bhalla Auto Manufacturing Co.
Address: Bhalla Auto Manufacturing Co, C-164, Phase V, Focal Point Phase 6, Focal Point, Ludhiana, Punjab 141010, Ludhiana, 141010, IN
Telephone: 090416 60007
Price range: $$

Mechanical properties - Steel Screws and Bolts ISO 898-1 EN 20898-1

s		3.6	4.6	4.8	5.6	5.8	6.8	8.8		10.9	12.9
s		3.6	4.6	4.8	5.6	5.8	6.8	<= 16mm	> 16mm	10.9	12.9
Tensile strength	nominal value	300	400	400	500	500	600	800	800	1000	1200
Rm in MPa (N/mm2)	minimum	330	400	420	500	520	600	800	830	1040	1220
Vickers hardness	minimum	95	120	130	155	160	190	230	255	310	372
HV=F 98N	maximum	220	220	220	220	220	250	300	336	382	434
Brinell hardness	minimum	90	114	124	147	152	181	219	242	295	353
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	maximum							320	356	402	454
HV 0.3	maximum							320	356	402	454
Yield stress	nominal value	180	240	320	300	400	480
Rel in MPa(N/mm2)	minimum	190	240	340	300	420	480
0.2% elongation limit	nominal value							640	640	900	1080
Rp0.2 in Mpa (N/mm2)	minimum							640	660	940	1100
Test stress Sp	Sp/ReL or Rp0.2	0.94	0.94	0.91	0.94	0.91	0.91	0.91	0.91	0.88	0.88
Test stress Sp	MPA (N/mm2)	180	225	310	280	380	440	580	600	830	970
Elongation after fracture	minimum	25	22	14	20	10	8	12	12	9	8
A5 in %	minimum	25	22	14	20	10	8	12	12	9	8

Weight Table

HRC for 8.8 bolts and nuts

Bhalla Fasteners which is the leading manufacturer, supplier and exporter of Steel Screws and Bolts according to ISO 898-1 EN 20898-1 in India.

IS 1367 grade 8.8 Chemical properties

Property class	Material and heat treatment	Chemical composition limit (cast analysis, %)^a					Tempering temperature ⁰C Min.
		C		P	S	B^b
		min.	max.	max.	max.	max.
8.8	Carbon steel with additives (e.g. Boron or Mn or Cr) quenched and tempered	0,15^e	0,40	0,025	0,025	0,003	425
	Carbon steel quenched and tempered	0,25	0,55	0,025	0,025
	Alloy steel quenched and tempered^g	0,20	0,55	0,025	0,025

IS 1367 grade 8.8 Mechanical properties

Mechanical or physical property		Tensile strength, R_m, MPa		Stress at 0,2 % non-proportional elongation, R_p0,2, MPa		Stress under proof load, S_p^f, MPa	Proof strength ratioS_p,nom/R_eL,min	Percentage elongation after fracture for machined test pieces, A, %	Percentage reduction of area after fracture for machined test pieces, Z, %	Height of non-decarburized thread zone, E, mm	Depth of complete decarburization in the thread, G, mm	Reduction of hardness after retempering, HV	Impact strength, K_V^ij, J

		nom.^c	min.	nom.c	min.	nom.		min.	min.	min.	max.	max.	min.
8.8	d≤ 16 mm^a	800	800	640	640	580	0,91	12	52	1/2 H₁	0,015	20	27
	d> 16 mm^b		830	640	660	600	0,91				0,016	21	27

IS 1367 grade 8.8 Recommended hardness

Mechanical or physical property		Vickers hardness, HV F ≥98 N		Brinell hardness, HBW F = 30 D²		Rockwell hardness, HRC		Surface hardness, HV 0,3
		Vickers hardness, HV F ≥98 N		Brinell hardness, HBW F = 30 D²		Rockwell hardness, HRC		Surface hardness, HV 0,3
		min.	max.	min.	max.	min.	max.	max.
8.8	D ≤ 16 mm^a	250	320	245	316	22	32	-
8.8	D > 16 mm^b	255	335	250	331	23	34	-

Mechanical properties - Steel Screws and Bolts ISO 898-1 EN 20898-1

HRC for 8.8 bolts and nuts

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