## What grade of bolt has the highest shear strength?

12.9 Bolt Shear Capacity

• 12.9 Bolts. A 12.9 bolt is one of the highest grade of bolts produced. Known for their high tensile strength, they are built with both hex and Torx heads and are available in zinc or chrome finishes.
• 12.9 Shear Strength. The minimum tensile strength of a 12.9 bolt is 1220 MPa.

Which is stronger A325 or Grade 8?

Strength Differences A325 bolts are typically manufactured from a medium carbon steel (although they can be made from an alloy) while SAE grade 8 bolts are made from a medium carbon alloy steel. Grade 8 bolts are significantly stronger than an A325.

### What grade is a shear bolt?

Normally shear bolts are Grade 2 and there is no soft grade #5 as it is either a grade #5 or not.

How is bolt shear capacity calculated?

The shear strength of all bolts = shear strength of one bolt x number of bolts • The bearing strength of the connecting / connected plates can be calculated using equations given by AISC specifications. The tension strength of the connecting / connected plates can be calculated as discussed earlier in Chapter 2.

#### How do you calculate shear strength?

Shear strength can be measured by a torsion test where it is equal to their torsional strength. When values measured from physical samples are desired, a number of testing standards are available, covering different material categories and testing conditions.

What does A325 mean on a bolt?

ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1⁄2 to 11⁄2 inches (13 to 38 mm) in diameter.

## What is the longest A325 bolt?

ASTM A325 structural bolts are designed for steel to steel connections….Available Sizes.

Diameters Allowed: 1/2″ – 1-1/2″
Available Lengths: Up to 6″ – 10″ maximum (depending on diameter)

How tight should a shear bolt be?

It should be a locking type nut and all you need to do is snug it down to where it contacts the auger sleeve and stop there. Don’t snug it down to where the spindle turns with the shaft. If you do you’ll defeat the purpose of the shear pin.