[MW:3750] Welding of SA 537

Can anyone tell me to weld the below material with SMAW which
electrodes we have to use , to weld with SAW which filler wire & flux
combination we have to use.
The material and test requirement is as below…

 Material is SA-537 Class 1, Fully Killed, Normalized, Charpy V-
Impact Tested
 Material is SA-516 Gr.70, Fully Killed, Normalized
 Thickness varies from 38 mm to 50 mm for both materials.
After complication of welding we have to test PTC (production test
coupon) @ -48˚C (Negative 48). The impact energy value shell be 50
joule.

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