The A958 Grade 8620  meets all the mechanical property requirements for the steel connector - 

-- Ultimate tensile strength (80 ksi)               -- Tensile yield strength (50 ksi), 
-- Elongation (22%)                                       -- Reduction in area (35%) .

The full max/min specification for chemistry (C = 0.18/0.23,  Mn =0.60/1.0,  Si 0.30/0.60,  P Max = 0.35,  S Max = 0.04,  Ni = 0.4/0.7, Cr = 0.4/0.60,  Mo = 0.15/0.25)  and the full specification for heat treatment (Austenitize at 1650F, air quench, Temper at 1150C)  ensure that the   casting will meet specifications.