Introduction
Hardness is the ability of a metal to plastically deform under the influence of an object with higher hardness (indenter). Hardness tests are very common since they determine not only a measure of the strength of a product but also its resistance to variable loads. It is important to check the hardness of any machine or object before using it in the manufacturing industry.
We already know that Birnell and Rockwell is the most common type of hardness test, but the Leebs hardness test is also used in some scenarios.
Here in this article, we will discuss the application, benefits, and disadvantages of Leeb hardness test methods.
I. What is the Leeb Hardness Test Method?
The Leeb hardness test is explained in ASTM A956 and ISO 16859 standards as a dynamic method to check the hardness of metallic material. It is determined by the ratio of rebound velocity to the impact velocity of a moving impact body. Leeb’s method is best applied to solid parts of the object for example casting and forgings. The Leebs hardness test is not as efficient as Birnell or other hardness tests, but it is a quick, easy to apply, and portable hardness testing method.