4 test those specimens that did not fall within the b

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4.Test those specimens that did not fall within the B scale using the aforementioned procedure.
7 5.Required Data Hardness Test Date: 9/24/18 Section: In class Party No. 2 . Recorder: Malav Observer: Chase Operator: Whitney . Calculator: All . Specimen Description Rockwell Scale Trials Avg. Rockwell Hardness No. Cprrespong Sandard Ball Brinell Tensile Strength (Ksi) 1. Rectangular Steel C 1. 66.8 2. 62.1 3. 61.4 4. 68.9 64.8 304.8 Steel 150 2. Brass C 1. 31.3 2. 34.2 3. 34.2 4. 38.8 34.6 116.2 Aluminum 60 3. Round Bar Carbon Steel C 1.47.8 2. 42.4 3. 62.5 4. 65.2 54.5 N.A. N.A. Table 1.1 Collected Data.
8 6.Conclusion/Analysis In a nutshell, HRD indenter shows that steel is harder than brass and aluminum. Aluminum shows NG because the specimen is too soft for the indenter. For HR15T indenter, the same result is obtained that is steel as the hardest specimen. HRV indenter shows that aluminum as the softest specimen among steel and brass because the result shown for steel and brass is NG, which means the indenter cannot calculate the hardness reading. It is a vital to test most materials before they are accepted for processing, and before they are put in to use to determine whether they meet the specifications required or not. One of these tests is for hardness. Hardness is the most important property. Therefore, we should learn to measure the hardness accurately. Brinell Hardness test machine seems very easy because it calculated the indentation areas automatically and show us. But Rockwell hardness testing machine is capable of testing more hard materials and its widely used. Therefore, we should learn it perfectly. 7.Reference: Course Pack
9 Appendix 1 Table 3.1
10 Appendix 1 Table 3.2

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