How do you calculate bolt tensile strength?

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.

What is stronger grade 8 or ASTM A574?

Common Inch / Imperial SAE Grades: (all values in ksi or 1000 lbs / square inch) Socket Head Cap Screws made from alloy steel are typically manufactured to a higher strength than SAE Grade 8: 180 ksi tensile strength for fasteners up to 1/2 inch, 170 ksi for larger sizes (ASTM A574, p. G-34).

How do you calculate yield strength from tensile strength?

Calculating Yield & Tensile Strength

  1. Yield Strength. Take the minimum yield in psi of the ASTM grade (see our Strength Requirements by Grade Chart for this value), multiplied by the stress area of the specific diameter (see our Thread Pitch Chart).
  2. Ultimate Tensile Strength.
  3. Shear Strength.

What is tensile strength with example?

It is expressed as the minimum tensile stress (force per unit area) needed to split the material apart. For example, if a metal rod one square inch in cross-section can withstand a pulling force of 1,000 pounds but breaks if more force is applied, the metal has a tensile strength of 1,000 pounds per square inch.

What is bolt tensile strength?

Tensile strength is the amount of pull the bolt can withstand before breaking. The method used for tightening the bolt is also dependent upon the grade of the bolt. The grades are indicated on top of the bolts as raised numbers or dashes. There are three main systems of bolt classification: SAE, Metric and ASTM.

What grade bolt is ASTM A574?

ASTM A574/A574M Socket Head Cap Screws, 12 Point Screws ASTM A574/A574M covers quenched and tempered alloy steel Socket Head Cap Screws and Allen Bolts ranging form size #0 to 4 inch. The screws shall be fabricated from alloy steel made to a fine grain practice.

What is the tensile strength of a Grade 8 bolt?

150,000 PSI
A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI.

How do you measure stress strength?

We calculate the stress, using the stress formula: σ = F/A = 30*10³ / (1*10⁻⁴) = 300*10⁶ = 300 MPa . Finally, we divide the stress by strain to find the Young’s modulus of steel: E = σ/ε = 300*10⁶ / 0.0015 = 200*10⁹ = 200 GPa .