YM-A Penetration Comparison Test Block for Sensitivity Calibration & Penetrant Testing Quality Control
YM-A Penetration Comparison Test Block for Sensitivity Calibration & Penetrant Testing Quality Control
YM-A type penetration test block (also known as aluminum alloy test block) is used to compare the sensitivity test of different penetrants or the sensitivity comparison of new and old penetrants. The test block has symmetrical defects on both sides A and B, and can be compared with different penetrants for testing, or the same penetrant can be used under different operating methods to determine the standard operation. It can also be used as a penetrant for corrosion testing of aluminum materials.
Maintenance of test blocks:
The comparison test block must be thoroughly cleaned after use to remove any residual penetrant on the test block. After cleaning, soak it in anhydrous ethanol solution for 30 minutes, air dry or blow dry it, and then place it in a test block box and store it in a dry place.
| Inspection item | Test method and condition and requirement |
| Block Material | Through the physical and chemical test type A block material for LY12 aluminum alloy for materials, the chemical components conform to the provisions of ASTM,GB/T3190. |
| Form and dimensions | By means of a micrometer measurement block length is 76 + 0.1 mm, and the width fifty + / - 0.1 mm, thick and±1 mm. Cut along the length center evenly divided into two pieces, and in block A and B and unity Numbers block length orientation and plate rolling direction. Milling, grinding the surface roughness after treatment for Ra= 1.2u m- 2.5 u m. |
| Colour | Visual its color is silvery white. |
| Oxidizing property | In -55℃ ~ 200℃ - store between three years not metamorphism,no oxidation,colour and lustre is silver |
| Crack | In the same Numbers of the A and B block with dye penetrant inspection method measured random crack 3μm,3μm-5μm and more than 5μm open crack on one side not less than four, and there are two above width is not more than 3μm open crack. Block A and B on the surface crack distribution is similar. |
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