b) Based on 500 000 000 cycles of completely reversed stress using the R.R. Moore type of machine and specimen. 

c) Average of tension and compression moduli. Compression modulus is about 2% greater than tension modulus. 

d) 1350-0 wire have on elongation approximately 23% in 250 mm (10 in.). 

e) 1350-H19 wire will have an elongation of approximately 1.1/2% in 250 mm (10 in.). f) Tempers T361 and T861 were formerly designated T36 and T86, Respectively. g) Based on 107 cycles using flexural type testing of sheet specimens. h) T7451, although not previously registere, has appeared in literature and in some specification as T73651