Can a scleroscope hardness be related to a Brinell hardness

Can a scleroscope hardness be related to a Brinell hardness test? Why or why not? For what individual applications are the Brine, Rockwell, Vickers, or scleroscope tests best suited? Give at least three examples in which the hardness of a material should be known before a part is manufactured from it. Which hardness test(s) would be suitable for measuring sheet metals? What is the difference between density and specific gravity? If apart weighs 22.4 g and displaces 3.5 mL of water, what is its density in grams per cubic cent/metre? What is its specific gravity? If a cylindrical bar has a diameter of 1.5 in is 3 25 in. long, and weighs 0.87 lb, what is its density\' in pounds per cubic inch? The specific gravity of nickel is 8.9. What is its density in grams per cubic centimetre? What is its density in pounds per cubic foot? Consider the specific gravity of the following metals: aluminum = 2.7

Solution

Hardness is defined as the resistance offered by the material against mechanical deformation. for hardness measurement we have different tests, they are:

1.Mho test (or) Scratch test

2.Brinell test

3.Rockwell test

4.Vicker test (or) Micro hardness test

5.Knoop test

1.Brinell test:

Brinell test is applicable to medium hard materials only

eg:flourite,aptite,feldspar

2.Rockwell method:

Rockwell method is applicable to all types of material(i.e,low hard materials,medium hard materials and high hard materials)

eg:talcum,gypsum,calcite,flourite,aptite,feldspar,quartz,to paz,silicon carbide,diamond.

3.Vicker test:

Vicker test is applicable to medium hard materials only.