What is conclusion of Brinell hardness test?

What is conclusion of Brinell hardness test?

Conclusion The objective of this experiment was to find the hardness of steel and aluminum samples using the Brinell Hardness Test. From the results obtained by performing this experiment, one can conclude that the objectives were accomplished despite having some small sources of error.

What does a Brinell test measure?

Introduction. Brinell Hardness Testing is a nondestructive testing method that determines the hardness of a metal by measuring the size of an indentation left by an indenter. At a defined ball diameter and test force, larger indents left in the surface by the Brinell Hardness Testing Machine indicate a softer material.

How do you read Brinell hardness?

A Brinell hardness value consists of the following components:

1. The numeric hardness value;
2. The three letters “HBW”, standing for “Hardness according to Brinell” (with hard metal ball made from tungsten carbide);
3. The ball diameter in mm;
4. The applied test load in kgf;

What does Brinell hardness show?

The Brinell hardness number is a number proportional to the load or test force of a hard steel ball to the calculated curved area of the indentation formed. The ball diameter is 1, 2.5, 5, or 10 mm.

What are the advantages of Brinell test?

Advantages of Brinell Hardness Test: This hardness test is less sensitive. It is used to measure the hardness of components made from powder metallurgy and cast. It can bear the heavy load for testing. Indentation made on the sample can be seen and measure under a microscope or eyepiece.

What is the limitation of Brinell hardness test and why?

A limitation of the Brinell test is the size of the indentation made. The standard Brinell test produces so large an impression that it is considered to be destructive test under some circumstances. The test is fairly slow, because of the time required to measure the diameter and to determine the hardness.

What is difference between HB and BHN?

HB – ball 10 mm, load 29,400N (3000 kgf) durata 15 seconds. BHN – Brinell Hardness Number, which is the same meaning as HB….Formula A – Convert HRC into HB.

Rockwell C Hardness (HRC)	Brinell Hardness (HB)
From 31 to 40	HB = 8.570 * HRC + 27.6
From 41 to 50	HB = 11.158 * HRC – 79.6

What does a high Brinell hardness number mean?

In this case, the ultimate tensile strength (in psi) approximately equals the Brinell Hardness Number multiplied by 500. Generally, a high hardness will indicate a relatively high strength and low ductility in the material.

What is the range of scale of hardness in Brinell testing?

It is desirable that the test load are limited to a impression diameter in the range of 2.5 to 4.75 mm….The Brinell hardness test of metals and alloys.

Brinell Hardness Number	Load (kg)
160 – 600	3000
80 – 300	1500
26 – 100	500