PLease advise the compatibility of welding different material as follows:
1)ASTM A694 Gr. F65
2)ASTM A860 Gr. F65
3)ASTM A234 Gr. WPB
4)ASTM A105
Can this material be welded?
What is the different between ASTM A694 and A860, which material is better for high strength fittings? Please advise.