1. What is a Welding Throat Thickness Calculator?

Definition: This calculator determines the throat thickness of a fillet weld based on the leg length.

Purpose: It helps welders and engineers ensure proper weld strength by calculating the critical throat dimension.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( t \) — Throat thickness (mm)
• \( a \) — Leg length (mm)
• \( \cos(45°) \) ≈ 0.7071

Explanation: For an equal-leg fillet weld, the throat thickness is approximately 0.707 times the leg length.

3. Importance of Throat Thickness

Details: Throat thickness is the minimum distance from the root to the face of a fillet weld, determining its load-bearing capacity.

4. Using the Calculator

Tips: Simply enter the leg length in millimeters. The throat thickness will be calculated automatically.

5. Frequently Asked Questions (FAQ)

Q1: What is the standard angle used in the calculation?
A: The calculation assumes a 45° angle between the two pieces being welded, which is standard for equal-leg fillet welds.

Q2: Does this work for unequal leg fillet welds?
A: No, this calculator is specifically for equal-leg fillet welds. Unequal legs require a different calculation.

Q3: Why is throat thickness important?
A: It determines the effective area that carries the load, directly affecting weld strength.

Q4: What's a typical leg length for fillet welds?
A: Common sizes range from 3mm to 12mm, but the required size depends on material thickness and load requirements.

Q5: How accurate is this calculation?
A: It provides a theoretical value. Actual throat may vary slightly due to welding technique and penetration.