Hardness Testing

MES offers fast and reliable hardness testing of metals, polymers, and minerals.

Hardness testing of metals, composites and minerals is the resistance to indentation, introduced by diamond or tungsten ball, and it is determined by measuring the permanent depth of the indentation. The hardness test is a fast and cost effective method for determining the condition of a material following heat treatment, ease of machinability, or the provide insight into strength and wear resistance.

Rockwell hardness testing is the most widely used method for determining the superficial hardness of a material. The majority of Rockwell hardness values for steels are covered by the Rockwell C and B scales. Thinner samples are tested using lighter loads associated with the Rockwell T and N scales. Generally, the surface should be flat and sanded smooth to obtain an average of three of more readings.

The Brinell Hardness Test is utilized to measure hardness over a larger sample areas. Brinell hardness is particularly useful for castings and forgings, that have a rough surface or micro structure too coarse for other hardness testing methods. Brinell testing is often performed with a high test load (500 to 3000 kgf) and a 10mm wide indenter so that the resulting indentation averages out most surface and sub-surface inconsistencies. The resulting impression is measured across at least two diameters and these result averaged. The averaged diameter measurement is then converted to a Brinell hardness number.

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  • Non destructive minus a small indentation
  • Simple and rapid procedure for fast results
  • Converts to all common hardness scales
  • Standardized test methods
  • ASTM E18 – Rockwell
  • ASTM E10 – Brinell
  • Accessibility to test area
  • Smooth surface finish free of coatings
  • Minimum thickness of 0.02”/li>