A Charpy V Notch test was conducted for an ASTM A572 Grade 50 bridge steel. the average values of the test results at four different test temperatires were found to be

10ft.lb -(-50 F)

15 ft.lb- 0F

40 ft.lb- 40F

60 ft.lb-100 F

the bridge will be located ina region where specifications require minimum of 25 ft.lb fracture toughness at 30 F for welded fracture-critical member, does the steel have adequate Charpy V Notch fracture toughness? show your supportin calculations

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