AISI 4145

[mubeen mubeen]

Hi,

Can anybody help me out in order to weld subject base material with appropriate consumables(Electrode or filler wire), along with its preheat and post weld heat treatment temperatures.

Regards,

Mubeen

QA Engineer

[ashish baviskar]

dear Mubeen,

                        Please tell me which type of welding you are going to use . Whether it is SAW or SMAW or FCAW ? AISI 4145 material are mostly use in API spec 7 , 7-1 products like drill collars, drill pipes , subs etc. and also tell me the application. 

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ASHISH BAVISKAR

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ABSIV INDIA PVT LTD.

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[mubeen mubeen]

Ashish,

We have in our facility the welding processes like SMAW, SAW, GTAW & GMAW. The reason behind to quality PQR is to weld AISI 4145 Base material for build up and machine back to drawing required dimensions.

Ashish you are right, this material can be used for Tool joints, Drill pipe and Collars manufacturing purposes,because it meets to API minimum Yield strength requirements.

Regards,

Mubeen

+966-565013851

[Ramin Kondori]

So it's an overlay job, right...?

Do you need the same mechanical properties as the base metal (4145) or you are overlaying to achieve more hardness or corrosion resistance...?

I mean what are your desired properties for finished weld...?

Ramin  Kondori

   QC/Welding Engineer 

         IWE AT 0070

   

[mitesh patel]

Dear Mubben 

Please Find H/W Attached Doc. Which is help to selection of Welding  consumable ( SMAW & GTAW ) 

Mitesh Patel

Sr, QA/QC Engg

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[chris]

Hello friends;

Was this query answered?

 I am also encountering a similar problem in welding 4145tube to S355.

we are experiencing a lack of fusion on the 4145 tube side.

Preheat given 150°C

Electrodes tried E7018 and E10018

MTC attached. The tube is Quench tempered.

Any suggestions on this?

Thanks in Advance.

Chris

[Simon Krismer]

150C is way too low for 4145. The HAZ Hardness will be 50-60HRC at that temperature, and you are no doubt getting hydrogen cracking rather than lack of fusion. 

You will need 250C preheat at least, probably higher for the root run. 

[Chris Sabu]

Thanks ;

Infact we cleared this issue 

300 degree was the preheat given .. even we maintained the inter pass temperature above 250 .. finished the welding after 8hrs continuously without any interruptions.. finally gave pwht @ 600 degree with half hr hold .. later slow cooling with the thermal blanket still in place ..

Tempering must have gone away by this process and the tensile also would have come down .. but still we pressure tested it at 300 bar without failure 

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THANKS AND REGARDS

CHRIS SABU

0559695451