Evaluation and Repair of Wrought Iron and - Purdue e-Pubs ...

97Table 4.4 Average and Standard Deviation of Tensile Coupon Test ResultsEyebarsModulusofElasticity(ksi)YieldStrength(psi)(.002offset)TensileStrengthPercentElongationStrainHardening(psi) (%) ExponentStrengthCoeff.(ksi)Average 27,700 31,600 47,200 11.7 0.19 81RoundsSt. Dev. 500 1,280 3,380 4.5 0.02 6.70% of Avg. 1.8% 4.1% 7.2% 38.6% 11.7% 8.3%Average 28,000 28,000 46,800 25.7 0.23 84All TestsSt. Dev. 620 1,790 2,470 5.5 0.02 2.65% of Avg. 2.2% 6.4% 5.3% 21.5% 8.5% 3.2%Average 27,900 29,900 47,000 18.1 0.21 82St. Dev. 590 2,410 3,050 8.7 0.03 5.55% of Avg. 2.1% 8.1% 6.5% 48.1% 14.6% 6.8%HeatStraightenedAverage 28,057 32,125 49,625 12.9 0.20 85St. Dev. 542 629 2,016 8.8 0.09 45.95% of Avg. 1.9% 2.0% 4.1% 68.5% 45.3% 54.1%Mech.StraightenedAverage 26,731 31,000 37,500 3.1 0.13 65WeldedAverage 27,806 30,500 47,100 8.4 0.19 83HistoricSt. Dev. 140 866 2,702 1.3 0.01 3.17% of Avg. 0.5% 2.8% 5.7% 15.2% 5.2% 3.8%Average NA 33,300 54,000 23.2 NA NASt. Dev. 2,990 9,000 7.6% of Avg. 9.0% 16.7% 32.9%