Shear and Tension Capacity of Stainless Steel Bolts
The shear capacity of a bolt, Psb, should be taken as:
Psb = psb As
where:
psb is the shear strength of bolt
As is the shear area, usually taken as the tensile stress area, unless it can be guaranteed that the threaded portion will be excluded from the shear plane, in which case it can be taken as the unthreaded shank area.
The tension capacity Pnom is given by Pnom = 0.8 ptb At where:
ptb= 0.7 Usb (U is the tensile strength)
The following tables gives the shear strengths (in N/mm2) of stainless steel bolts and shear capacities (in kN) for bolts of diameter M12 to M24.
Shear strengths of bolts in clearance holes
| Bolt grade (EN ISO 3506) |
Property class (EN ISO 3506) |
Shear strength psb (N/mm2) |
| A1, A2 and A4 |
50 |
145 |
| 70 |
311 |
| 80 |
384 |
Shear and tension capacities of bolts in clearance holes
| Bolt size |
Property class
EN ISO 3506 |
Shear capacity (1)
Psb (kN) |
Tension Capacity
Pnom (kN) |
| M12 |
50 |
12.2 |
14.2 |
| 70 |
26.2 |
30.3 |
| 80 |
32.4 |
37.8 |
| M16 |
50 |
22.7 |
26.4 |
| 70 |
48.7 |
56.5 |
| 80 |
60.3 |
70.3 |
| M20 |
50 |
35.5 |
41.2 |
| 70 |
76.1 |
88.2 |
| 80 |
94.1 |
109.8 |
| M24 |
50 |
51.1 |
59.3 |
| 70 |
109.6 |
127.1 |
| 80 |
135.6 |
158.1 |
| (1) The shear area As has been taken as the tensile stress area of the bolt, At |
Note: These values of shear capacity should be used in conjunction with FACTORED loads. The relevant load factors can be obtained from BS 5950 The structural use of steelwork in building, Part 1 Code of practice for design - rolled and welded sections.
Related References:
ASTM A453 High-Temperature Bolt with Expansion Coefficient
Shear and Tension Capacity of Stainless Steel Bolts
Tightening Torques for Stainless Steel Bolts
Stainless Steel Tensile and Proof Stress Of Metric Bolts Screws
Steel Bolts Strength Specification
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