How to Calculate Weld Deposition Rate

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Weld Deposition Rate Calculator

Calculate the weight of weld metal deposited per hour (lbs/hr).

0.023″ 0.030″ 0.035″ 0.045″ 0.052″ 1/16″ (0.0625) 3/32″ (0.0937)
Steel = 0.283 | Aluminum = 0.098
Deposition Rate: 0.00 lbs/hr
Daily Output (8hr): 0.00 lbs

What is Weld Deposition Rate?

Weld deposition rate is a measure of how much weld metal is actually added to a weld joint per unit of time, typically expressed in pounds per hour (lbs/hr) or kilograms per hour (kg/hr). For fabrication shops and welding engineers, this is a critical metric for estimating project costs, labor requirements, and overall productivity.

The Weld Deposition Rate Formula

To calculate the deposition rate for continuous wire processes like GMAW (MIG) or FCAW (Flux-Cored), we use the volume of the wire consumed and multiply it by the density and efficiency.

Rate = Area of Wire × Wire Speed × 60 × Density × Efficiency

Where:

  • Area: π × (Wire Diameter / 2)²
  • Wire Speed: Inches per minute (IPM)
  • 60: Minutes in an hour
  • Density: Weight per cubic inch (Steel is approx. 0.283)
  • Efficiency: The percentage of the wire that actually ends up in the weld (MIG is ~95%, Flux-Cored is ~80-85%).

Typical Efficiency Ratings

  • GMAW (MIG): 93% – 97%
  • FCAW (Flux-Cored): 80% – 86%
  • SMAW (Stick): 60% – 70%
  • SAW (Submerged Arc): 99%

Practical Example

If you are using 0.045″ diameter wire running at 300 IPM with a standard efficiency of 95% for solid steel wire:

  1. Radius = 0.045 / 2 = 0.0225″
  2. Area = 3.14159 × (0.0225)² = 0.00159 sq in
  3. Volume per hour = 0.00159 × 300 × 60 = 28.62 cubic inches
  4. Weight before efficiency = 28.62 × 0.283 = 8.1 lbs/hr
  5. Final Deposition Rate = 8.1 × 0.95 = 7.69 lbs/hr
function calculateDeposition() { var diameter = parseFloat(document.getElementById('wireDiameter').value); var speed = parseFloat(document.getElementById('wireSpeed').value); var efficiency = parseFloat(document.getElementById('efficiency').value) / 100; var density = parseFloat(document.getElementById('materialDensity').value); if (isNaN(diameter) || isNaN(speed) || isNaN(efficiency) || isNaN(density) || speed <= 0) { alert("Please enter valid positive numbers for all fields."); return; } // Calculation Logic // 1. Calculate Area of the wire cross-section (sq inches) var radius = diameter / 2; var area = Math.PI * Math.pow(radius, 2); // 2. Volume per hour (cubic inches) // Speed (inches/min) * 60 (min/hr) * Area (sq inches) var volumePerHour = area * speed * 60; // 3. Weight per hour (lbs/hr) // Volume * Density * Efficiency var depositionRate = volumePerHour * density * efficiency; var dailyOutput = depositionRate * 8; // Display Results document.getElementById('lbHrResult').innerText = depositionRate.toFixed(2) + " lbs/hr"; document.getElementById('lbDayResult').innerText = dailyOutput.toFixed(2) + " lbs (assuming 100% arc-on time)"; document.getElementById('resultDisplay').style.display = "block"; }

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