Filler Wire selection

[Rajendra Jadhav]

Dear All,

Hope you all are doing well,

I have an query while doing selection of welding filler wire for combination of SS316 L  and Titanium Gr.2 materials welding procedure specification.

Application - Pressure vessel Part {Pipe (SS316L) to Flange (ASTM B862) connection}

Please guide me for the same.

Thank you in advance. 

Best Regards,

Rajendra

[pgos...@rogers.com]

Hi,

You can not weld Titanium to Stainless steel by conventional arc welding process. If to be welded by arc welding process using Copper as Interlayer or a transition material. It would involve expensive R&D work. The other option is to is to perform solid state welding (Friction Stir Welding), which would not be possible for the component in question.

 

What’s the technical rationale behind choosing 316L Piping and Ti Gr-2 as flange?? Why the flange can’t be of identical 316L, same as the piping material?

 

Thanks.

 

Pradip Goswami.P.Eng, IWE.

Independent  & Consulting Welding & Metallurgical Specialist

Saudi Aramco Approved Designated Welding Engineer(DPWR)

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgos...@rogers.com,pradip....@gmail.com

Cell/Whasapp:1-905-9793232

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[Xuân Thông]

Dear sir,

The pipe and flange will be operated in the same condition, so why did you weld SS316L (pipe) to SS316L (Flange)

I think that is more easy

Vào Th 3, 18 thg 5, 2021 vào lúc 10:16 Rajendra Jadhav <raj0...@gmail.com> đã viết:

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[Ramon Briceno]

Dear,

A little risky to make this SS vs Titanium welding, due to its metallurgical incompatibility, since the welding generates FeTi-based intermetallic compounds that make the joint very fragile. Recently a welding method called CMT (cold metal transfer) appeared with very low heat input. It's for drips. It cools, solidifies and drips back. It takes a lot of technical practice and extreme care. Pure copper is used as a buttering between the SS / Ti.

Like the Mr. Pradip's advice, you can look to transition in another way. It is right.

 

Ramon Briceno

Metallurgical Engineer.

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