There are major differences between the Brinnel system and Rockwell system. The Advantages of Brinell Hardness system are: The Disadvantages of the Brinell System are: The Advantages of the Rockwell system are: The Disadvantages of the Rockwell system are: Some limitations are: To conclude, the possible sources of error can be Page 2 of 3 Page 3 of 3 Sample Lab Report (2).pdf GRAPH: Ultimate Tensile Strength (ksi or MPa) SAMPLE CALCAULATIONS: Estimated Slope Rise / Run = Error: Title of Graph Brinell Hardness Number % Error = Actual value - Theoretical Value x 100% Theoretical Value -3.52= %error = /3.52*100= Page 1 of 39% 3:28 PM The obtained value for the slope= , is almost the same as the published value of 3.52MPa on page 6 of the lab course pack. RESULTS: The results are very which is From the graph, the relationship between Brinell number and UTS rating is close to a line of best fit as was expected. The percent of the error calculated was and this shows that the test was carried properly. Page 2 of 3 Purpose: Procedure: Data sheet: Sample Load Diameter HBW Estimated Anticipated Actual NO. (kg) of UTS Rockwell Rockwell impression (MPa) hardness hardness Blade 3000 2.80 477 1675 50HRC 48.8HRC cultivator 3000 3.00 415 1450 45HRC 44.6HRC Leaf spring 3000 2.90 444 1550 47HRC 43.6HRC Tool 3000 2.90 414 1550 47HRC 45.4HRC Jack 3000 2.95 429 1495 46HRC 46.9HRC Hammer 300 W 3000 4.90 149 503 81HRB 82.2HRB Grader 3000 3.00 415 143 45HRC 45.3 HRC Graph: Text Predictions: On Accessibility: Investigate D