Statistical Analysis of Structural Plate Mechanical Properties (Part 1)

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Table 3.4: Raw Data on Carbon Equivalent Values from Mill 5. Grade A 572 A 588 Thickness Group Carbon Equivalent (%) from Mill 5 Carbon Equivalent Mean Low High T1 0.414 0.402 0.408 0.402 0.414 T2 0.382 0.428 0.405 0.382 0.428 T3 0.435 0.457 0.446 0.435 0.457 T4 0.446 0.433 0.440 0.433 0.446 T1 0.437 0.437 0.437 0.435 0.437 T2 T3 0.435 0.480 0.480 0.447 0.440 0.457 0.457 0.469 0.451 0.447 0.440 0.480 0.457 T4 0.510 0.510 0.510 0.510 16
3.1.2 STATISTICAL ANALYSIS RESULTS FROM ALL MILLS Tables 3.5 and 3.6 summarize the statistical analysis results for the 4-mill group (mills 1, 3, 4, and 5) and the 2-mill group (mills 2 and 6), respectively. Each table includes the mean and coefficient of variation values of the carbon equivalent for each thickness group from the individual mills as well as the overall statistics (i.e., including all the mills in the corresponding mill group). Table 3.5: Statistical Analysis of Carbon Equivalent for the 4-Mill Group. Group Carbon Equivalent (CE) % Mill 1 Mill 3 Mill 4 Mill 5 Overall No. of Heats Mean COV, % No. of Heats Mean COV, % No. of Heats Mean COV, % No. of Heats Mean COV, % No. of Heats Mean COV, % A572-T1 3 0.40 4.60 1 0.37 - 2 0.42 1.82 2 0.41 2.16 8 0.40 6.29 A572-T2 1 0.39 - 2 0.39 0.72 3 0.44 1.82 2 0.41 7.92 8 0.41 6.67 A572-T3 1 0.38 - 2 0.40 2.67 0 - - 2 0.45 3.55 5 0.42 7.28 A572-T4 0 - - 0 - - 0 - - 2 0.44 2.17 2 0.44 2.17 A588-T1 3 0.45 8.26 1 0.42 - 2 0.44 1.64 2 0.44 0.27 8 0.44 5.10 A588-T2 1 0.46 - 2 0.42 0.62 3 0.48 1.22 2 0.47 4.13 8 0.46 6.50 A588-T3 1 0.50 - 1 0.46 - 0 - - 2 0.45 2.10 4 0.46 5.33 A588-T4 0 - - 1 0.49 - 0 - - 1 0.51 - 2 0.50 3.54 A572 All Groups 5 0.39 3.60 5 0.39 1.80 5 0.43 1.82 8 0.42 4.48 23 0.41 6.39 A588 All Groups 5 0.46 6.24 5 0.44 0.37 5 0.46 1.39 7 0.46 2.50 22 0.46 5.57 All Data 10 0.43 5.30 10 0.42 1.23 10 0.45 1.60 15 0.44 3.62 45 0.43 5.97 Table 3.6: Statistical Analysis of Carbon Equivalent for the 2-Mill Group. Carbon Equivalent (CE) % Group Mill 2 Mill 6 No. of Heats Mean COV, % No. of Heats Mean COV, % A572-T1 91 0.32 18.3 430 0.35 11.9 A572-T2 4 0.35 26.4 255 0.34 10.9 A572-T3 - - - 160 0.40 5.07 A572-T4 - - - 148 0.40 4.49 A588-T1 10 0.42 18.9 50 0.44 2.94 A588-T2 - - - 58 0.44 2.75 A588-T3 - - - 51 0.47 2.62 A588-T4 - - - 23 0.48 2.21 A572 All Groups 95 0.32 18.8 993 0.36 9.58 A588 All Groups 10 0.42 18.9 182 0.46 2.70 All Data 105 0.33 18.9 1175 0.38 8.56 From Table 3.5, it may be observed that, for any one mill in the 4-mill group, the average carbon equivalent ranged from 0.37% to 0.51%. The overall variability in 17
Page 2 and 3: STATISTICAL ANALYSIS OF STRUCTURAL
Page 4 and 5: FORWARD This work was sponsored by
Page 6 and 7: TABLE OF CONTENTS Chapter Page CHAP
Page 8 and 9: CHAPTER 1 INTRODUCTION 1.1 INTRODUC
Page 10 and 11: CHAPTER 2 DATA DESCRIPTION AND PREP
Page 12 and 13: 2.1.2 THE 2-MILL GROUP Due to the f
Page 14 and 15: It can be observed from Figure 2.2
Page 16 and 17: 2.3 PROPERTIES TO BE STUDIED In the
Page 18 and 19: understand the significance of the
Page 20 and 21: 3.1.1 ORGANIZED DATA FROM THE 4-MIL
Page 24 and 25: carbon equivalent values measured w
Page 26 and 27: CE vs. Tensile Strength 95 90 85 A5
Page 28 and 29: 100 95 90 A572: y = 52.667x + 57.62

Statistical Analysis of Structural Plate Mechanical Properties (Part 1)

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