[MW:2962] Re: nitrogen & argon

I expect it's cheaper and fit for purpose, requiring considerably less processing than nominally pure argon.

 

Owen.

----- Original Message -----

From: rajagopal kannan

To: materials-welding@googlegroups.com

Sent: Tuesday, August 18, 2009 10:04 AM

Subject: [MW:2959] nitrogen

Hi,

I could see in a client spec. insisting the use of 98% Ar and 2% Nitrogen gas mixture for backing and shielding of duplex steel welding.

What could be the significance of using 2% Nitrogen?

How it is technically advantageous over use of single argon gas?

Thanks and Regards,

K.RAJAGOPAL

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