Elongation Increasing Decreasing thousandths of inches tension force (lb) tension force (lb) 0 0 -- 1 3500 0 2 6300 3000 3 9200 6000 4 11500 8800 5 13000 11100 6 13500 12300 7 13900 13500 8 14000 14000 9 14300 14300 10 14500 14500