Expansion Bolt for Steel Framed Building

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The expansion bolt is also known as expansion anchor or wedge anchor. The working principle of it is to take advantage of the wedge slope to promote expansion and generate frictional bond strength, thus achieving the fixing effect.

The expansion anchor comes in strength grades of 45, 50, 60, 70, and 80. The materials are mainly austenitic A1, A2, A4, martensitic and ferritic C1, C2, C4. For example, A2-70 stands for a catagory that adopts austenitic A2 material and has a strength grade of 70. The following is the full specification sheet.

Expansion Bolt for Steel Framed Building

The expansion bolts are commonly made of Q215, Q235, 25 and 45 steel. To make important or special-purpose fasteners, we have optional high mechanical performance alloys, such as 15Cr, 20Cr, 40Cr, 15MnVB, 30CrMrSi, etc.

M12	M14	M16	M18	M20
80	100	100	150	150
90	125	120	180	180
100	150	125	200	200
110		145	250	250
120		150	300	300
130		180
150		200
180		250
200		300

Parameters

Thread	Length	Nominal Length	Expanding Dimensions		Installation Dimensions	Drilling Dimensions		Parts to Be Connected	Static Load
d	b	(common specification)	Diameter	Length	(for reference only)	Diameter	Depth	Max. thickness L2	Tensile strength	Shear strength
(mm )									(N)
M6	35	65, 75, 85	10	35	3	10.5	40	L-50/-	2350	1770
M8	40	80,90,100	12	45	3	12.5	50	L-62/-	4310	3240
M10	50	95,110,125	14	55	3	14.5	60	L-75/L-83	6860	510
M12	52	110,130,150	18	65	4	19	75	L-90/L-100	10100	7260
M16	70	150,175	22	90	4	23	100	L-122/L-135	19020	14120