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Return To ShopDeFelsko Certified Step Blocks provide traceable calibration standards for ultrasonic thickness gauges, facilitating in-house verification of instrument accuracy. Machined from 1018 steel, nickel-plated, and supplied with calibration certificates, they ensure compliance with ISO and internal quality management. Available in both imperial and metric step sets.
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DeFelsko’s Certified Step Blocks are robust, nickel-plated 1018 steel reference standards used to verify ultrasonic thickness gauge performance. With calibrated step increments and documented traceability, they support ongoing calibration checks and quality assurance protocols in inspection workflows.
Each set includes a long-form calibration certificate with material test report
Durable construction with corrosion and wear resistance
Supports both mil/inch and mm versions for diverse use cases
Imperial ±1 mil; Metric ±0.025 mm (or other tolerances depending on block)
Designed specifically for verifying UTG (ultrasonic thickness) probes
| Specification | Value / Description |
|---|---|
| Material / construction | Steel 1018, nickel-plated for corrosion & wear resistance |
| Available sets / models | B1 (Imperial), B1M (Metric), B2 (High-Range Imperial), B2M (High-Range Metric), P (Thin Imperial) |
| Step sizes (imperial sets) | B1: 100, 200, 300, 400, 500 mil ; B2: 1.000”, 1.500”, 2.000”, 2.500”, 3.000”, 3.500”, 4.000”, 4.500” |
| Step sizes (metric sets) | B1M: 2.5, 5, 7.5, 10, 12.5 mm ; B2M: 25.0, 37.5, 50.0, 62.5, 75.0, 87.5, 100, 112.5 mm |
| Accuracy / tolerance | Imperial sets: ±1 mil; Metric sets: ±0.025 mm (or equivalent) |
| Supplied paperwork | Long-form Certificate of Calibration + Material Test Report |
| Use / application | Checking calibration / verification of ultrasonic thickness gauges (e.g. PosiTector UTG) |