A professional who examines and tests metal samples to determine their physical properties, under direction of metallographer. Responsibilities include:

• Conducts routine microscopic examinations of metals and alloys to determine their crystal structure, porosity, homogeneity, and other characteristics.
• Polishes or etches metal specimens and photographs samples, using photomicroscope, or directs photography technical personnel to take, develop, and mount photomicrographs.
• Examines metal and alloy samples with x-ray, gamma-ray, and magnetic-flux equipment to detect internal fractures, impurities, and similar defects in metals.
• Tests samples in pressure devices, hot-acid baths, and other apparatus to determine strength, hardness, elasticity, toughness, or other properties of metal.