How long does it take to inspect a typical part (e.g., 100 mm x 100 mm x 100 mm)?

For a typical 100 mm cube, a complete X-ray CT inspection is often planned as a multi-stage job rather than a fixed runtime. An illustrative estimate is approximately 2 to 8 hours, but the actual schedule depends on material density, wall thickness, resolution, mounting, acquisition, reconstruction, analysis, queue, and report scope. For an RFQ, provide the drawing revision, alloy, geometry, quantity, final condition, critical zones, acceptance standard, and delivery milestone. For aerospace or medical programs, the report supports but does not replace project-level qualification or release approval. Confirm the timeline after the scan plan receives approval.

Key Factors Determining Inspection Duration

1. Required Resolution and Scan Parameters

Resolution and field of view are linked. A fine voxel target can require more projections, longer acquisition, and more reconstruction work than a screening scan. Select the resolution from the smallest reportable feature and acceptance rule, then confirm the schedule after the CAD and inspection plan are reviewed.

• Standard Resolution (e.g., 50-100 µm voxel size): Suitable for detecting larger porosity and general internal defects. A scan at this resolution for a 100 mm part might take 2-4 hours.

• High Resolution (e.g., 15-30 µm voxel size): Necessary for finding micro-porosity, fine cracks, or validating thin walls. To achieve this, the system must take many more individual projections (X-ray images), potentially increasing the scan time to 4-8 hours or more.

2. Material Density and X-ray Energy

Material density and thickness influence beam energy, contrast, exposure, and artifact control. A dense alloy, a thick wall, or a channel hidden behind another feature may need a different orientation or a second scan. The timeline varies with the material, geometry, access, and required evidence, so record those conditions in the quote.

• Low-Density Materials (e.g., Aluminum Alloys, Plastics): These allow for lower energy X-rays and faster exposure times, leading to shorter scan durations, often in the 2-4 hour range.

• High-density materials (e.g., Titanium Alloys, Stainless Steel) require high-energy X-rays and longer exposure times per projection to achieve sufficient penetration, which pushes scan times toward 4-6 hours.

• Very High-Density Materials (e.g., Superalloys like Inconel 718): Present the greatest challenge, often requiring the longest exposure times and thus the longest scan durations.

The Three Phases of the Inspection Workflow

The work normally includes setup and mounting, radiographic acquisition, reconstruction, image review, defect classification, and report preparation. Cleaning, alignment, calibration, and a repeat scan can add time when the first result is inconclusive. Keep the as-built, treated, and final machined states separate in the record.

1. Setup and Mounting (~30-60 minutes): This involves carefully positioning the part on the rotary stage to optimize the scan path and support stability, which is critical for image clarity.

2. Data Acquisition (Scanning) (~2-8 hours): This is the actual CT scanning process, where the system collects hundreds to thousands of 2D X-ray projections as the part rotates.

3. Data Reconstruction and Analysis (~1-4 hours): After scanning, the 2D projections are computationally reconstructed into a 3D volume. This is followed by the crucial step of an analyst evaluating the data, segmenting defects, and generating a report. This analysis time can be as important as the scan time itself.

Strategic Application and Timing

A quick screen and a release inspection have different review depth. A release package may require raw images, CT data, calibrated references, quantitative measurements, engineering review, and a signed disposition. State the required inspection level, quantity, drawing revision, and delivery milestone in the RFQ, then request a schedule tied to the approved scope.

• Rapid Feedback: For process development or non-critical checks, a faster, standard-resolution scan may be sufficient.

• Final Quality Certification: For a safety-critical component in Aerospace and Aviation or a Medical and Healthcare implant, a high-resolution scan is a specified investment of time to support the part is free from detrimental defects that could lead to failure. This detailed inspection provides the final validation that complements other quality data, such as mechanical testing of [witness coupons](### The Purpose and Importance of Testing Final Parts).

The useful planning answer is a conditional timeline, not a fixed promise. Confirm the material, wall thickness, internal geometry, resolution, scan route, sample state, acceptance criterion, report fields, and queue before committing the date. If an indication needs CT, sectioning, or a second reviewer, record that hold point and revise the release schedule.

What the Turnaround Estimate Includes

Part dimensions alone do not determine CT or X-ray time. The schedule can include application review, fixturing, calibration, multiple views, reconstruction, segmentation, defect analysis, dimensional comparison, and report approval. Dense alloys, complex channels, high contrast requirements, and quantitative metrology usually need more review than a simple screening scan.

For an RFQ, provide material, envelope, wall-thickness range, critical regions, required detectability, dimensional requirements, quantity, and whether a formal signed report is needed. Confirm whether the quoted time is machine time or complete turnaround from receipt to approved report, and identify the disposition authority for indications.