ASTM A694 Gr. F52 v ASTM A350 Gr. LF2 v AISI 4130

I am looking to use hammer unions on a 5K HP Mud relief system, and am looking for advice on which material i should specify. The piping class i am working from specifies AISI 413O, but i may also use ASTM A350-LF2(modified to 52K yield strength), or ASTM A694 - GR-F52 as a further alternative. I realise i can use any of these materials, but can anyone tell me why I would chose one over the other?

Thanks in advance

Paul