Testing
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MD Exports LLP is unique in its ability to offer broad metallurgical testing capabilities for sheet and plates, in addition to metal distribution and processing. MD Exports LLP does most of its processing in-house, however we have long established relationships with fully accredited labs to supplement our customers’ special requirements.
Specific testing capabilities in our toolbox include
Hardness testing
MD Exports LLP is equipped with both Rockwell and Brinell indentation machines. Both Rockwell and Brinell tests are conducted using similar processes, however the results are interpreted by use of the Rockwell hardness number, HRA/HRB/HRC, or the Brinell hardness number, BHN.
Ultrasonic testing
Ultrasonic metal testing, or UT testing, is a nondestructive test (NDT) which uses a straight beam to detect internal porosity and cracks. UT can also be performed via a shear wave to detect longitudinal surface cracks. UT tests can be completed in conformance with ASTM A578 and ASTM A435.
Charpy impact testing
Charpy impact tests, or Charpy V-notch test, is a standardized high strain-rate test which determines the amount of energy absorbed by metal during fracture. The absorbed energy is a measure of a steel’s notch toughness and acts as a tool to study temperature-dependent ductile-brittle transition. Charpy is widely applied in industry, since it is easy to prepare and conduct and results can be obtained quickly and cheaply. MD Exports LLP can test to either ASTM E23 or EN 10045-1.
Chemical composition tests
Customers sometimes need material analysis for carbon, alloy and stainless steels. MD Exports LLP has an optical emission spectrometer (OEM) to perform rapid simultaneous analysis of up to 18 elements. The high energy spark emits a spectrum of radiation with wavelengths converted to the elemental composition.
Microscopic analysis
Microscopic analysis provides views magnified from 50 to 1000 times actual to determine the exact microstructure of the metal under review. Customers need this information either to ensure that materials are to specification or to do root cause, failure analysis stemming from inherent material flaws, such as seams, quench cracks, and inclusions.
Other NDT tests. Die penetrant and magnetic particle inspection are two other common NDT tests. MD Exports LLP can provide this type of verification, available upon request.
