Problem

A specimen of ductile cast iron having a rectangular cross section of dimensions 4.8 mm ×...

A specimen of ductile cast iron having a rectangular cross section of dimensions 4.8 mm × 15.9 mm () is deformed in tension. Using the load–elongation data shown in the following table, complete parts (a) through (f).

Load		Length
N	lbf	mm	in.
0	0	75.000	2.953
4,740	1,065	75.025	2.954
9,140	2,055	75.050	2.955
12,920	2,900	75.075	2.956
16,540	3,720	75.113	2.957
18,300	4,110	75.150	2.959
20,170	4,530	75.225	2.962
22,900	5,145	75.375	2.968
25,070	5,635	75.525	2.973
26,800	6,025	75.750	2.982
28,640	6,440	76.500	3.012
30,240	6,800	78.000	3.071
31,100	7,000	79.500	3.130
31,280	7,030	81.000	3.189
30,820	6,930	82.500	3.248
29,180	6,560	84.000	3.307
27,190	6,110	85.500	3.366
24,140	5,430	87.000	3.425
18,970	4,265	88.725	3.493
Fracture

(a) Plot the data as engineering stress versus engineering strain.
(b) Compute the modulus of elasticity.
(c) Determine the yield strength at a strain offset of 0.002.
(d) Determine the tensile strength of this alloy.
(e) Compute the modulus of resilience.
(f) What is the ductility, in percent elongation?