Welding electrode to weld AISI 4140 with AISI 4130

[Aly]

Dear All, Thank you for your time to read my question.   I have to weld grade AISI 4130 with AISI 4140. Weld joint configuration is a groove weld 6inch dia.   Which electrode is suitable for welding these base metals together.   UTS of these parent metals is around 95 to110 ksi.   Thanks   Mhaskar Aly

[Kathalingam Babu]

Hi

 

Use ER80SG (Root )/E10018-D2 (Filling& Capping) , with a minimum preheat of 150 deg cel. and

 

PWHT @650 deg. cel and soaking time depending on the hardness requirements  if any.

 

Thanks & Regards,

 

K. Babu

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[Elshan Feyzullayev]

Hi Aly,
 
Both of these steels are low alloy steels. E10018-D2 electrodes (e.g. OK 74.86 from ESAB) would be an ideal for these type of steels.
AISI 4130 is a good weldable in compare with AISI 4140. You need to follow a strict preaheating on 120-150 deg.C and apply PWHT straight after welding to relief the stress at 620 deg. with a soak time dependant on the thickness of to be welded parts. 
 
Due to the fact that these type of steels are prone to post weld cracking 100% RT is mandatory before and after PWHT.
 
If any question please feel free to contact.

Thanks,
Elshan.
Baku, Azerbaijan.

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Date: Tue, 14 Dec 2010 21:48:58 +0300
From: mhask...@gmail.com
To: material...@googlegroups.com

Subject: [MW:8733] Welding electrode to weld AISI 4140 with AISI 4130