welding A297 HD with AISI 1020 1

[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 apprecite
thanks
matteo

 

[stanweld]

How thick are the materials and what is the service temperature?

 

[11041977]

finished it is 1 inch, 25mm tick, sincerely i don t know service temperature, i m only manufacturer nit designer, i know this cylinder is used in hot roll mill, maybe 500-600 C°?
thanks for help

 

[metengr]

In this case, use the following;

Filler metal - Inconel 82 or 182

Preheat - 200 deg F

Cool in air

Interpass temperature - 350 deg F max

 

[stanweld]

Ditto metengr.

 

[11041977]

hi stanweld
i do not understand what do you want to day with Ditto metengr.

 

[11041977]

i had this information by Esab:

Filler Metal - Arcaloy 312-16 (E312-16) or OK 68.81 (E312-17)
Preheating would not normally be required
Slow cooling would not normally be required
For a simple flange to pipe weld post weld heat treatment would not normally be necessary

What do you think about?
thanks

 

[stanweld]

11041977,
It means that I agree with metengr.

 

[metengr]

11041977
I think the nickel base filler metal will provide better service versus the 312 because of the better match in the linear coefficient of expansion between the carbon steel and cast austenitic stainless steel. The preheat is for the carbon steel, not the austenitic stainless steel.

 

[Duwe6]

Concur with metengr, especially on the importance of preheat on the carbon side and slow cooling. Either use hi-temp insulation or vermeculite as soon as each weld pass is completed, wait until temp is below 350F. The 350F max is for the S/S side.