1. What is Screw Strength?

Screw strength refers to the maximum load a screw can withstand before yielding or failing. It's calculated based on the cross-sectional area of the screw and the material's yield strength.

2. How Does the Calculator Work?

The calculator uses the screw strength formula:

Where:

• \( \text{Strength} \) — Maximum load capacity (N)
• \( \text{Area} \) — Cross-sectional area (mm²)
• \( \text{Yield Strength} \) — Material's yield strength (MPa)

Explanation: The equation calculates the force at which the screw material will begin to deform plastically.

3. Importance of Screw Strength Calculation

Details: Proper screw strength calculation ensures mechanical integrity in constructions, prevents overloading, and helps select appropriate screw sizes for specific applications.

4. Using the Calculator

Tips: Enter the cross-sectional area in mm² and the material's yield strength in MPa. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine the cross-sectional area?
A: For standard screws, use the tensile stress area (available in engineering tables). For custom screws, calculate using π×(d/2)² where d is the diameter.

Q2: What's typical yield strength for common screw materials?
A: Mild steel: ~250 MPa, Stainless steel 304: ~215 MPa, Grade 8 steel: ~640 MPa, Titanium: ~800 MPa.

Q3: Should I apply a safety factor?
A: Yes, divide the calculated strength by a safety factor (typically 2-5) for real-world applications.

Q4: Does thread type affect strength?
A: Yes, fine threads generally have higher strength than coarse threads of the same diameter.

Q5: How does temperature affect screw strength?
A: Elevated temperatures typically reduce yield strength. Consult material-specific data for high-temperature applications.