RE: [MW:4125] Low hydrogen electrodes for station piping

Low hydrogen electrodes are indeed less susceptible to HIC and tend to give better low temperature impact values. There are as you probably know good suppliers of low hydrogen vertical down electrodes for pipeline welding.

 

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of John Du Plessis
Sent: 21 January 2010 09:03
To: materials-welding@googlegroups.com
Subject: RE: [MW:4119] Low hydrogen electrodes for station piping

 

 

 

I disagree. Low hydrogen is not stronger weld metal than cellulosic – check the AWS strength classes. Do however agree that low hydrogen weld metal is less susceptable to hydrogen induced cracking

 

John du Plessis

Technology Manager

 

Tel: +27 (11) 298 2100

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www.saiw.co.za

 

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of michael lawrence
Sent: 21 January 2010 12:51 AM
To: materials-welding@googlegroups.com
Cc: michael lawrence
Subject: Re: [MW:4114] Low hydrogen electrodes for station piping

 

because low hydrogen is a stronger weld material and less hydrogen content so less cracking in the weld and heat afected zone area.

 

 

regards

mike.

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

From: Gulam kader

To: materials-welding@googlegroups.com

Sent: Wednesday, January 20, 2010 9:54 AM

Subject: [MW:4104] Low hydrogen electrodes for station piping

 

Dear all,

 

why we are always using low hydrogen electrodes for station piping instead of cellulose electrode. somebody can explain please?

 

Regards,

 

Gulam Kader

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