These grades are a measure of the tensile strength-to-Brinell hardness ratio.
2.
The Vickers and Brinell hardness scales correlate well over a wide range, however, with Brinell only producing overestimated values at high loads.
3.
Brinell is noted as the creator of a method for quantifying the surface hardness of materials, now known as the Brinell hardness test.
4.
For example, some alkali and noble metals ( Pd, Ag ) have anomalously high ratio of the bulk modulus to the Vickers of Brinell hardness.
5.
There is a general trend of increasing Vickers hardness, Brinell hardness, density and melting point from lanthanum to lutetium ( with ytterbium being the most notable exception ).
6.
It has a tensile strength of 221 to 310 MPa, a specific gravity of 8.7, a density 8, 719 kg / m 3, a Brinell hardness of 65 to 74, and a melting point of around 1000 degrees Celsius.
7.
Mangalloy has been used in the mining industry, tempering, and usually have a normal Brinell hardness of around 200 HB, ( roughly the same as 304 stainless steel ), but, due to its unique properties, the indentation hardness has very little effect on determining the scratch hardness ( the abrasion and impact resistance of the metal ).
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