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welding A297 HD with AISI 1020

welding A297 HD with AISI 1020

welding A297 HD with AISI 1020

(OP)
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

RE: welding A297 HD with AISI 1020

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

RE: welding A297 HD with AISI 1020

(OP)
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
 

RE: welding A297 HD with AISI 1020

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

 

RE: welding A297 HD with AISI 1020

Ditto metengr.

RE: welding A297 HD with AISI 1020

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

RE: welding A297 HD with AISI 1020

(OP)
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

RE: welding A297 HD with AISI 1020

11041977,
It means that I agree with metengr.

RE: welding A297 HD with AISI 1020

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.

RE: welding A297 HD with AISI 1020

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.

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