EN 10228-3 describes ultrasonic testing of ferritic and martensitic steel forgings
Test applies to four types of forgings classified by shape and production method
Testing must be performed after final quality heat treatment
Manual pulse-echo technique with scanning speed not exceeding 150 mm/s
Equipment and Surface Conditions
Normal probes with frequencies 1-6 MHz and effective crystal diameters 10-40 mm
Shear wave probes with beam angles 358-708 and effective crystal areas 20-625 mm2
Scanning surfaces must be free from paint, scale, and irregularities
Surface finish must match required quality class
Scanning and Classification
Grid scanning or 100% coverage required based on forging type
Two types of indications: Pattern 1 for small discontinuities, Pattern 2 for large
Discontinuities classified as point, extended, isolated, or grouped
Recording levels and acceptance criteria specified for different quality classes
Quality Control
Personnel must be qualified according to EN 473
Equipment must be calibrated and checked according to prEN 12668-3
Reference blocks required for sensitivity and defect sizing
Couplant must be removed after testing if not affecting subsequent operations
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