The Brinell indentation diameter is measured using a microscope or a calibrated measuring device. After applying a known load to a hardened steel or carbide ball indenter, the diameter of the resulting indentation is carefully observed. Typically, the measurement is taken across the widest part of the indentation. This diameter is then used in the Brinell hardness formula to calculate the material's hardness value.
Internal diameter.
The radius of a circle is half the diameter.
with a big tape measure
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
I have No Clue........
The Brinell hardness tester was invented to measure the hardness of materials using an indentation. Applied force is measured against the force, diameter of indentation and indenter.
Brinell hardness number is calculated by dividing the applied load in kilograms by the surface area of the resulting indentation in square millimeters. The formula is expressed as: ( \text{Brinell Hardness Number (BHN)} = \frac{\text{Applied Load (kg)}}{\pi \times \text{Indentation Diameter (mm)} \times (\text{Diameter of Ball (mm) - Indentation Diameter (mm)})} ).
The Brinell hardness test is a standardized test in material science. It measures the hardness of a metal by measuring the indentation on the material caused by an indenter.
Hardness Brinell values provide information on the hardness of a material based on the indentation it makes when a predetermined force is applied. Higher Brinell values indicate a harder material, while lower values indicate a softer material. It is a useful metric for comparing the relative hardness of different materials.
Both are two different scales of hardness measurement.
The Rockwell test is generally considered less accurate than the Brinell test because it measures hardness using a smaller indenter and a shallower penetration depth, which can be influenced by surface conditions and microstructural variations. The Brinell test, on the other hand, uses a larger indenter and measures the diameter of the indentation, providing a more comprehensive assessment of the material's hardness over a larger area. This makes the Brinell test more reliable for heterogeneous materials, while the Rockwell test's speed and simplicity make it more suitable for quick assessments in uniform materials.
The unit of hardness is typically expressed in terms of Rockwell (HRC), Vickers (HV), or Brinell (HB) scale depending on the specific test method used. Hardness is a measure of a material's resistance to deformation or indentation.
the formula of B.H.N is give less accurate value when the indentation is more. It has only one scale And applied only to some materials.
Brinell hardness tester uses a ball to apply a specified load on the material surface, measured by the resulting indentation size. Rockwell hardness tester uses a diamond cone or steel ball to penetrate the material, and hardness is calculated based on the depth of penetration. Brinell is better for softer materials and larger test areas, while Rockwell is more versatile and provides different scales for various materials.
A durometer is an instrument that is used to measure hardness. Specifically, a durometer can be used to measure a material's resistance to indentation.
The formula to convert Vickers to Brinell hardness is: Brinell Hardness = (2.025 x Vickers Hardness).
Johan August Brinell died in 1925.