5. An earthquake caused the brittle fallure of a ductile link in a steel eccentrically brace frame. The steel manufacturer declined any responsibility, however they did not specify the material grade. You organize a number of tensile and Charpy-V-notch tests of the material. The results found are summarized in Table 3. What steel grade do you suspect the materials is? (Use the tables extracted from AS/NZS 3679.1:2016 to provide your answer) Table 3 Charpy-V-notch test results Tensile test Specimen thickness 25 mm Minimum yield strength recorded 323MPa 441 MPa 23% Minimum Tensile strength recorded Elongation Charpy V-notch test Test number Absorbed energy [] Test temperature #1 118 100 #2 115 100 #3 98 100 #4 63 0 #5 71 0 #6 82 0 #7 55 0 8 -15 #9 12 -15 #10 00 -15 Answers to Question 5: a) Either Grade 300L0 or Grade 350LO b) Either Grade 300L15 or Grade 350L15 c) Either Grade 30050 or Grade 35050 d) Grade 300LO e) Grade 300SO f) Grade 35050 5. An earthquake caused the brittle fallure of a ductile link in a steel eccentrically brace frame. The steel manufacturer declined any responsibility, however they did not specify the material grade. You organize a number of tensile and Charpy-V-notch tests of the material. The results found are summarized in Table 3. What steel grade do you suspect the materials is? (Use the tables extracted from AS/NZS 3679.1:2016 to provide your answer) Table 3 Charpy-V-notch test results Tensile test Specimen thickness 25 mm Minimum yield strength recorded 323MPa 441 MPa 23% Minimum Tensile strength recorded Elongation Charpy V-notch test Test number Absorbed energy [] Test temperature #1 118 100 #2 115 100 #3 98 100 #4 63 0 #5 71 0 #6 82 0 #7 55 0 8 -15 #9 12 -15 #10 00 -15 Answers to Question 5: a) Either Grade 300L0 or Grade 350LO b) Either Grade 300L15 or Grade 350L15 c) Either Grade 30050 or Grade 35050 d) Grade 300LO e) Grade 300SO f) Grade 35050