welding A297 HD higt temperature steel with AISI 1020

[11041977]

hi all
anyone here can help me in this problem:
i have to join by GMAW a pipe material: ASTM A297 HD also DIN: GX40CrNiSi27-4 also UNS: J93005 with AISI 1020 carbon steel. can anyone tell me
1)wich select filler metals use to jon them
2) preheating temperature?
3) cooling rate?
any help is appreciate
thanks
matteo

 

[metengr]

This has been answered in the welding forum.