Video of 50 mm Standard
Video of 100 mm Standard
Video of 150 mm standard
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Jiangsu Valin - Xigang Special Steel Pre-acceptance

MA Nordic, Östersund, Sweden, August 24-25, 2010

Casey Powers, Field Engineer, Magnetic Analysis Corporation

Item 7 of Jiangsu Contract, Signal to Noise

Detect all defects dynamically in 50, 100, and 150 mm standard bar > than 10 db S/N for the UT and > 3:1 S/N for the eddy current rotobar tester. Speed will be the maximum that is safe to run at the MA Nordic plant (not to exceed 60m/min).

Defects on drawing 13C-3784C, 13C-3785C, and 13C-3786C

ü  Defect 1: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Eddy Current Tester

ü  Defect 1: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Ultrasonic Tester

ü  Defect 2: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Eddy Current Tester

ü  Defect 2: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Ultrasonic Tester

ü  Defect 3: 0.8 mm DIA X 15 mm DEEP DRILLED HOLE

ü  Defect 4: 0.8 mm DIA X 15 mm DEEP DRILLED HOLE

ü  Defect 5: 0.8 mm DIA X 15 mm DEEP DRILLED HOLE

Item 14 of Jiangsu Contract, Stability of System

ü  Deviation of signal to noise ratio after two hours of running ≤ 1 dB. (UT)

ü  Deviation of signal to noise ratio after two hours of running ≤ 1 dB. (EC)

ü  Deviation of signal to noise ratio after eight hours of running ≤ 1.5 dB. (UT)

ü  Deviation of signal to noise ratio after eight hours of running ≤ 1.5 dB. (EC)

Note: No quantitative data was obtained for stability testing at MA
Nordic due to time constraints. However qualitative observations and the excellent stability exhibited during testing in Mt. Vernon, NY, we fill that this will not be an issue during the final acceptance.

Item 20 of Jiangsu Contract, Circumferential Sensitivity Difference

ü  Difference of circumferential sensitivity ≤ ±2dB under condition of sample testing. Difference of circumferential sensitivity is subject to detection of ¼ D artificial flaw and near surface flaw. (UT Only)

Additional Items:  None                                                                                                                                                                                                

Results                                                                                                                                                                                                                                

All extraneous indication below is a result of welds on the standards or scratches from transport or handling normally seen in standards that have been shipped and used to setup a system. These indications are real and repeatable and should not be considered system noise.  

50 mm UT

50 mm EC

100 mm UT

100 mm EC

127 mm UT

127 mm EC

Circumferential Results (100 mm standard)                                                                                                                                                       

0 degrees

90 degrees

270 degrees