How do you calculate coating inspection cost per part?

Multiply the parts inspected by the per-part inspection rate and the sampling coverage factor, add the fixed QA setup charge, then divide by parts. With 100 parts at $45, 80% coverage and a $250 setup, total is $3,850 and per-part inspection cost is $38.50.

What is a good inspection cost per coated part?

It depends entirely on criticality. Commercial wear coatings may inspect at a few dollars per part; aerospace coatings with bond pull tests, cross-sections, and full NDT can run $30-$100+. A $38.50 per-part figure fits a moderately critical coating with sampling.

How does the sampling coverage factor change cost?

It scales the per-part rate by how much of the lot you actually test. At 80% coverage the captured inspection value is $3,600 rather than $4,500 at full coverage — moving to a 10% sample would cut it far further.

Should destructive test coupons be included here?

Partly. The labor is captured in the per-part rate, but the value of parts or coupons consumed by bond pull and metallographic tests, plus the re-spray of scrapped test pieces, should be added separately for a true cost.

When should I use 100% inspection instead of sampling?

On flight-critical or safety-critical coatings where a single escape is catastrophic, or when a new process is not yet capable. The trade-off is cost — full coverage here would raise captured value from $3,600 to $4,500.

What does the fixed QA setup charge cover?

One-time-per-lot costs that do not scale with part count: gauge calibration, standing up a test cell, preparing metallographic mounts, or NDT equipment setup. Here that is the $250 that lifts total cost to $3,850.

Thermal Spray, Hardfacing & Wear Coatings calculator

Inspection Cost Calculator

Inspection Cost totals what quality assurance adds to a thermal spray or hardfacing lot — bond strength pull tests, metallographic cross-sections, thickness gauging, porosity checks, and dye-penetrant or ultrasonic NDT. Quality engineers and estimators use it because coating inspection on critical parts (aerospace, oil and gas, turbine hardware) is often a significant slice of piece cost and is easy to underquote. It matters because inspection scales with sampling policy: a 100% pull-test regime costs far more than a 10% sample plan, and destructive tests consume parts. This calculator turns your sampling coverage and NDT rate into a defensible total and per-part inspection cost.

What this calculator does

Inspection Cost totals what quality assurance adds to a thermal spray or hardfacing lot — bond strength pull tests, metallographic cross-sections, thickness gauging, porosity checks, and dye-penetrant or ultrasonic NDT.
Use it when inspection cost in thermal spray, hardfacing and wear coatings is being put through a thermal spray, hardfacing and wear coatings weighted-cost review.
It multiplies inspected parts by the per-part inspection rate and a sampling coverage factor, adds a fixed QA setup charge, and divides back to per-part inspection cost.

Formula used

Inspection Cost cost = quantity × rate × capture factor + fixed cost
Per-unit inspection cost = total cost ÷ quantity

Inputs explained

Coated parts inspected per lot:
Inspection labor and NDT cost per part:
Sampling coverage factor:
Fixed QA setup and calibration charge:

How to use the result

Use it when quoting a coated lot with defined inspection requirements or comparing the cost impact of tightening or loosening a sampling plan.
It assumes a uniform per-part inspection rate; destructive tests like bond pull or cross-section actually consume whole parts and coupons, whose material and re-spray cost this simple model does not separately capture.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
The producer price index for industrial chemicals stands at 344.336 (BLS, May 2026), up 16.1% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate coating inspection cost per part? Multiply the parts inspected by the per-part inspection rate and the sampling coverage factor, add the fixed QA setup charge, then divide by parts. With 100 parts at $45, 80% coverage and a $250 setup, total is $3,850 and per-part inspection cost is $38.50.
What is a good inspection cost per coated part? It depends entirely on criticality. Commercial wear coatings may inspect at a few dollars per part; aerospace coatings with bond pull tests, cross-sections, and full NDT can run $30-$100+. A $38.50 per-part figure fits a moderately critical coating with sampling.
How does the sampling coverage factor change cost? It scales the per-part rate by how much of the lot you actually test. At 80% coverage the captured inspection value is $3,600 rather than $4,500 at full coverage — moving to a 10% sample would cut it far further.
Should destructive test coupons be included here? Partly. The labor is captured in the per-part rate, but the value of parts or coupons consumed by bond pull and metallographic tests, plus the re-spray of scrapped test pieces, should be added separately for a true cost.
When should I use 100% inspection instead of sampling? On flight-critical or safety-critical coatings where a single escape is catastrophic, or when a new process is not yet capable. The trade-off is cost — full coverage here would raise captured value from $3,600 to $4,500.

Last reviewed 2026-05-12.