Reinforced Hexagon Bolt for Steel Framed Building Manufacturer

Reinforced Hexagon Bolt for Steel Framed Building

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The reinforced hexagon bolt is a shear bolt with improved high strength. In construction, it is subject to the initial tightening and final tightening. It is a standard part that is generally used for permanent connection.

The reinforced hexagon bolt is suitable for hard-wearing high strength connections in the construction of railway or road bridges, steel boilers, industrial plants, tall buildings,tower masts, lifting mechanisms, etc.

GB/T 3632-363 Reinforced Hexagon Bolt for Steel Works

Sizes

Thread		M16	M20	M22	M24	M27	M30
Pitch		2	2.5	2.5	3	3	3.5
da	max	18.83	24.4	26.4	28.4	32.84	35.84
ds	max	16.43	20.52	22.52	24.52	27.84	30.84
ds	min	15.57	19.48	21.48	23.48	26.16	29.16
dw	min	27.9	34.5	38.5	41.5	42.8	46.5
dk	max	30	37	41	44	50	55
k,	nominal	10	13	14	15	17	19
	max	10.75	13.9	14.9	15.9	17.9	20.05
	min	9.25	12.1	13.1	14.1	16.1	17.95
k'	min	12	14	15	16	17	18
k"	max	17	19	21	23	24	25
r	min	1.2	1.2	1.2	1.6	2	2
db	max	11.3	14.1	15.6	16.9	19.3	21.4
db	min	11	13.8	15.3	16.6	18.7	20.8
dc ≈		12.8	16.1	17.8	19.3	21.9	24.4
de ≈		13	17	18	20	22	24

Mechanical Properties

Catagory	Tensile Strength	Yield Strength σ_0.2	Elongation δ₅	Shrinkage Ψ
	σь	Mpa	%	%
	Mpa	min
10.9S	1040 - 1240	940	10	42
8.8S	830 - 1030	660	12	45

Physical Tensile Load

Thread		M16	M20	M22	M24	M27	M30
Stress Area(mm²)		157	245	303	353	459	561
Tensile Load KN	10.9S	163 - 195	255 - 304	315 - 376	367 - 438	477 - 569	583 - 696
Tensile Load KN	8.8S	130 - 162	203 - 252	251 - 312	293 - 364	381 - 473	466 - 578

Materials of Bolts, Nuts, and Washers for Steel Structures

Type	Catagory	Thread	Material
Blot	10.9S	M12 - M24	20MnTiB
	10.9S	M27 - M30	35VB
	8.8S	M12 - M16	35#
		M20 - M24	20MnTiB
		M27 - M30	35VB
Nut	8H 10H	M12 - M30	35#
Washer	35 - 45 HRC	12 - 30	45#

Chemical Composition

Material	C%	Si%	Mn%	Ti%	V%	B%	P%	S%
20MnTiB	0.17 - 0.24	0.17 - 0.37	1.30 - 1.60	0.04 - 0.10		0.0005 - 0.0035	≤0.035	≤0.035
35VB	0.31 - 0.37	0.17 - 0.37	0.50 - 0.90		0.05 - 0.12	0.001 - 0.004	≤0.04	≤0.04
35#	0.32 - 0.40	0.17 - 0.37	0.50 - 0.80				≤0.035	≤0.035
45#	0.42 - 0.50	0.17 - 0.37	0.50 - 0.80				≤0.035	≤0.035