technique articles

Introduction of Hardness Tester Indenter

Indenter is a part of great importance in hardness testing. Its accuracy and quality is the important factor to ensure accurate value. Due to different testing methods, the indenter has different materials, geometrical shapes and requirement of accuracy. 

Sort by materials: steel, carbide alloy, man-made corundum and natural diamond cone.

Sort by shapes: spheroidal, conical, cylinder-shaped, regular pyramid and rhombus cone.

Sort by test methods: φ10、φ5、φ2.5 and φ1 mm carbide alloy indenter for Brinell hardness testing. φ1.588 and φ3.175 mm chilled steel or carbide alloy indenter, or diamond cone indenter with 120° intersection angle for Rockwell hardness testing. Tetrahedron diamond cone indenter with opposite side intersection angle of 136°±0.5°for Vikers hardness testing. Selection of the indenter should be accordance with test methods, hardness tester type and testing objects.