Telebrineller Hardness Testing
The equation used to find the test objects BHN is: X=H(Db/Ds)^2
Db= The diameter of the impression in the test bar
Ds= the diameter of the impression in the specimen
H= The known BHN of the test bar
X= The BHN of the specimen
For example: Db= 3.05mm, Ds= 3.15mm, H= 229 BHN
X= 215 BHN
These calculations can also be performed using the round Telebrineller Computer that comes with the kit. The disadvantage with using the computer is there is minimal documentation. Writing the calculations out allows you to see if any mistakes have been made.
Performing calculations is the last step in determining the Brinell Hardness Number of an object using Telebrineller Hardness Testing.