How is bolt strength calculated?
Tensile strength is the maximum tension-applied load the fastener can support prior to fracture. The tensile load a fastener can withstand is determined by the formula P = St x As.
How much weight can a M10 bolt hold?
For example, a grade 12.9 bolt will not snap until every square millimetre of the bolt cross section is carrying a load of at least 120 kg. Similarly a grade 8.8 bolt will not snap until it is carrying a load of 80kg per square millimetre….
| Size | Pitch (std) | Pitch (fine) |
|---|---|---|
| M5 | 0.8 | |
| M6 | 1.0 | 0.75 |
| M8 | 1.25 | 1.0 |
| M10 | 1.5 | 1.0 or 1.25 |
How do you find the bearing strength of a bolt?
Bearing strength at bolt holes.
- Bearing strength at bolt holes in connected part (5 x ½ in.
- At edges, Lc = 1.25 – hole diameter/2 = 1.25 – (3/4 + 1/16)/2 = 0.844 in.
- Rn = 0.75 x (1.2 Lc t Fu) = 0.75 x (1.2 x 0.844 x 0.5 x 58) = 22.0 3 2 kips.
- But, Rn ≤ 0.75 (2.4 db t Fu) = 0.75 x (2.4 x 0.75 x 0.5 x 58) = 39.15 kips.
What is the strength of a grade 5 bolt?
When it comes to the mechanical properties expected in this grading type, the following requirements are identified in Grade 5 bolts and should adhere to these standards: proof load is between 74,000 and 85,000 psi. the minimum yield strength ranges between 81,000 and 92,000 psi.
How much load can a M6 bolt take?
With additional consideration for the fatigue strength, and based on the strength class of 12.9 in the table, we select an M6 screw with maximum allowable load of 213 kgf.
How strong is a 12mm bolt?
12mm-1.75 Class 10.9 Hex Bolt (coarse thread)
| Class: | 10.9 | 931/933 |
|---|---|---|
| Material: | Steel | 1.75 |
| Head Style: | Hex | 65mm |
| Yield Strength, psi: | 136,300 | 19mm |
| Tensile Strength, psi: | 150,800 |
What is the minimum distance between bolts?
Minimum pitch (distance between centres of bolt holes) shall not be less than 2.5 times the nominal bolt diameter. The value is recommended in Clause 9.6.
What is the difference between shear strength and tensile strength?
Tensile strength represents how hard you can pull on something without it breaking. Shear strength represents how hard you can try to cut it without it breaking.
What is the tensile strength of an a2-70 hex nut?
The “70” denotes the minimum tensile strength to be met by the material (actually the bolt, screw or nut after manufacture). Therefore, A2-70 is an austenitic, acid proof stainless grade (usually 304 material – 304 or 304L) which has been cold worked to provide a minimum tensile strength of 700 N/mm2 (MPa).
What is a proof load for a bolt?
d) For structural bolting: 70000 N (M12), 95500 N (M14) and 130000 N (M16) Proof load is defined as the maximum tensile force that can be applied to a bolt that will not result in plastic deformation. A material must remain in its elastic region when loaded up to its proof load typically between 85-95% of the yield strength.
What are the minimum and maximum spacing for bolts?
Minimum and maximum spacing p1, p2 and edge distances e1, e2 for bolts are given in EN1993-1-8 Table 3.3. The minimum values are: e1 ≥ 1.2d0, e2 ≥ 1.2d0, p1 ≥ 2.2d0, p2 ≥ 2.4d0, where d0 is the diameter of the hole, e1, p1 are measured parallel to the load transfer direction and e2, p2 are measured perpendicular to the load transfer direction.
What are the grades of metric screws and bolts?
Metric bolt grades and strength calculator to show proof strength, tensile strength, Vickers / Brinell hardness, minimum breaking torque and stress area of metric bolts and screws made of carbon steel and alloy steel with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. Some notes from ISO 898 metric screw threads standards:
