Brinell Hardness Number

Last modified by

on

Sep 29, 2022, 12:52:10 AM

Created by

on

Jul 8, 2016, 2:34:38 PM

B H N = \frac{2 \cdot P}{π \cdot D (D - \sqrt{D^{2} - d^{2}})}

$BHN = (2*P)/(pi*D(D - sqrt(D^2-d^2)))$

(P) Applied Load

$(P)"Applied Load"$

(D) Diameter of Indentor

$(D)"Diameter of Indentor"$

(d) Diameter of Indentation

$(d)"Diameter of Indentation"$

The Math / Science

The Brinell Hardness Number characterizes the indentation hardness of materials through the scale of penetration of an indentor, loaded on a material test-piece. Its is one of several definitions of hardness in materials science. The typical test uses a 10 millimeter steel ball as an indentor with a 3,000 kgf (29.42 kN; 6,614 lbf) force. For softer materials, a smaller force is used; for harder materials, a tungsten carbide ball is substituted for the steel ball. The indentation is measured and hardness calculated using the Brinell Hardness Number formula:

$B H N = \frac{2 P}{π D (D - \sqrt{D^{2} - d^{2}})}$ $BHN=(2P)/(piD(D-sqrt(D^2-d^2)))$

where:

BHN = Brinell Hardness Number
P = applied load
D = diameter of indentor
d = diameter of indentation

References

A helpful Brinell Hardness Number equation tutorial can be found on YouTube at: https://youtu.be/liiopCScMck

The formula and definition are from WIkipedia (https://en.wikipedia.org/wiki/Brinell_scale).

This equation, Brinell Hardness Number, references 1 page

Equations and Data Items

•

π

$pi$ by MichaelBartmess

Comments
Attachments
Stats

No comments

BHN.JPG

Last 12 Months

This site uses cookies to give you the best, most relevant experience. By continuing to browse the site you are agreeing to our use of cookies.

Brinell Hardness Number

The Math / Science

References

Datasets

Equations and Data Items

Calculators

Equations and Data Items

Collections