The hardness tests are used to measure the hardness character of the metal. There are a number of hardness testing methods, whose values can be converted through hardness scales. The different hardness scales are represented by, Vickers, Rockwell C, Rockwell B, Leeb, Shore, and Brinell. They are abbreviated as HV, HRC, HRB, HL, HS, and HB.
Here, we will discuss one of the dynamic methods called the Leeb method and it’s one of the conversion charts: Leeb to Brinell Hardness Conversion Chart.
I. What is HL in Hardness?
HL in Hardness stands for hardness according to Leeb. It is one of the hardness testing methods. The Leeb hardness test is used to determine the hardness of materials such as metals. The Leeb is defined according to the ISO 16859 and ASTM A956 standards. The test is dynamic in nature. The hardness of the moving impact body from the Leeb method is calculated by the ratio between rebound velocity to impact velocity. Here, the impact velocity depends on the method and is between the range of 1.4 to3.0 m/s. Tungsten carbide cobalt, a ceramic, the ball shaped indenter, and the diamond are used as the impact body in the Leeb test.
II. What is HB in Hardness?
HB in hardness stands for hardness according to Brinell. It is one of the early hardness testing methods.