Tensile strength tests were carried out on two different grades of wire rod (“Fluidized Bed Patenting of Wire Rods,” Wire J., June 1977: 56–61), resulting in the accompanying data.

Sample Sample Mean Sample Grader Size (kg/mm2

) SD AISI 1064 m
129 x
107.6 s1
1.3 AISI 1078 n
129 y
123.6 s2
2.0