# Hardness Test

May 5th, 2015
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To compare the hardness of the carbon steel, mild steel and ASSAB steel using three different hardness tests, which are Vickers Hardness Test, Rockwell Hardness Test and Brinell Hardness Test. To study the hardness of mild steel, carbon steel and ASSAB which is an important in engineering to design structures or components that related in mechanical properties.

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Hardness TestTITLEHardness Tests And Charpy Impact TestOBJECTIVE1. To compare the hardness of the carbon steel, mild steel and ASSAB steel using three different hardness tests, which are Vickers Hardness Test, Rockwell Hardness Test and Brinell Hardness Test. 2. To study the hardness of mild steel, carbon steel and ASSAB which is an important in engineering to design structures or components that related in mechanical properties3. To determine the resistance of carbon steel and mild steel against sudden impact by Charpy Impact Test.INTRODUCTIONHardness is a measure of a materials resistance to localized plastic deformation. It also is one of the important properties to be considered. Mechanical properties of metals are a vital of engineering to design the components which using predetermined materials such that unacceptable levels of deformation and failure will not occur. Hardness is a resistance of properties of material to permanent (plastic) deformation caused by steel ball or pyramid-shape diamond when it is pressed onto its surface. There will be three basic method of Hardness Test that will be carried out on carbon and metal: (a) Vickers Test(b) Rockwell Test(c) Brinell TestTHEORY1. Vickers TestVHN = Applied load / Surface area of depression= = 1.854 P/ d2 (approximate) Where P = applied load (kgf)d = (d1+ d2) / 2 (mm) 2. Rockwell TestHRC = 100 d /0.002HRB = 130 d /0.002Where d = depth of the indentation3. Brinell TestBHN =

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