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Metallurgical Testing

Know Your Material’s Structure & Weaknesses

Metallurgical testing microhardnessMetallurgical testing and analysis can be a valuable source of information to any industry working with metals. Laboratory Testing’s metallography experts can examine samples to detect surface and internal flaws, determine microstructural features, evaluate heat treatments and assure conformance to required specifications. The metallurgical laboratory at LTI also performs root cause failure analysis when performance issues occur with metal products.

LTI metallurgical testing is PRI/Nadcap and A2LA accredited and completed according to detailed procedures to assure reliable results. Customers receive a Certified Test Report showing the complete results of each metallography test.

The first step in metallurgical testing is test sample preparation. Samples are prepared in our metallurgical lab using precision cutting, mounting, grinding and polishing techniques, as well as etching when required.

Metallurgical Testing Processes

Metallurgical lab SEM/EDS analysisMetallurgical analysis is performed by LTI’s engineers using a wide range of microscopic and macroscopic examination methods, microhardness testing and state-of-the-art equipment. The lab’s scanning electron microscopy (SEM/EDS) provides magnification to 300,000X for microanalysis of very small samples and areas of interest. Metallurgical testing results can be documented using digital imaging microscopes with optical magnification capabilities from 7X to 1000X. Welder and procedure qualification and corrosion analysis are additional services provided by the metallurgical laboratory at LTI.

Sample Preparation

Metallurgical testing sample preparation

  • Precision Cutting
  • 1.5″ & 2″ Mounts
  • Thermoset & Thermoplastic Mounting
  • Cold Mounting
  • Automatic, Hand Grinding & Polishing
  • Immersion, Swab & Electrolytic Etching

Microscopic Examinations

  • Microstructure
  • Carburization & Decarburization
  • Grain Size (ASTM E112)
  • Inclusion Rating (ASTM E45)
  • Plating/Coating Thickness
  • Carbide Precipitation
  • Ferrite by Point Count (ASTM E562)
  • Intergranular Attack & Oxidation
  • Alpha Case
  • Intergranular Corrosion (ASTM A262)
  • Sensitization
  • Surface Contamination
  • Nodularity, Nodule Count
  • Eutectic Melting

Macroscopic Examinations

  • Macro-etch (ASTM E340)
  • Grain Flow
  • Weld Qualification
  • Surface Condition
  • Surface Finish

Microhardness Testing

  • Case Depth
  • Profiles
  • Knoop & Vickers Testing
  • Carburization & Decarburization
  • Surface Contamination

Additional Services

  • Failure Analysis & Report Writing
  • Scanning Electron Microscopy (SEM/EDS)
  • Digital Imaging
  • McQuaid-Ehn Grain Size
  • Welder and Procedure Qualification in accordance with MIL & API specifications, ASME & AWS codes, ASTM & EN standards and the Pressure Equipment Directive

Subcontracted Services

  • Residual stress measurements by X-ray diffraction (XRD)
  • Plating thickness by X-ray fluorescence spectroscopy

News & Articles

New Microhardness Testing Capabilities
SEM/EDS Added for Testing and Failure Analysis