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Up Topic American Welding Society Services / Technical Standards & Publications / Railroad Rail Welding repair
- - By dancat777 Date 11-12-2009 18:53
I have welders that are D1.1 and D1.5 qualified with 7018 filler metal (group 4).

The track is a high manganese steel that requires a speciallty hardfacing rod - Lincoln Frogmang ED026101 DCEP coated 22% manganese alloy. 

Can a welder that is qualified on 7018 filler metal (group 4) also be considered qualified to use the above rod?  ( I think the filler metal group is 8)

Thanks,
Dan
Parent - - By waccobird (****) Date 11-12-2009 20:01
dancat777
Not enough info
But if The Lincoln Electrode you mention has a specified yield strength of 90 KSI or higher you will have to requalify for that electrode range.
Also Position and Thickness are factors, Were they qualified unlimited thickness and All Position?
Good Luck
Parent - - By dancat777 Date 11-12-2009 20:32
Thanks for your prompt response.

Yes, they are qualified for unlimited thickness and all position. 

A similar rod (McKay Hardalloy 119) has a tensile strength of 135,000 psi. 

I am having difficulty getting the technical specs on the Lincoln rod since I don't know my way around the website very well.  I got info from the hardsurfacing catalog but it did not include the tensile strength of the frogmag.  The rockwell hardness as deposited is 21 Rc and workhardened 50-55 Rc.

Further thoughts???
Parent - - By Mikeqc1 (****) Date 11-12-2009 22:23
i use it alot for certs if you want
post the lot number and rod info
I did find it difficult to navigate when i started using it
Parent - - By flamin (**) Date 11-13-2009 03:06 Edited 11-13-2009 03:09
I'm not familiar with the rod you mention, however, a few things to keep in mind. D1.1 (2006)
1.2 Limitations
The code is not intended to be used for the following:
(1) steels with a minimum specified yield strength greater than 100ksi.
(4) base metals other than carbon or low-alloy steels.

also, if your welders are qualified to an F4 group using 7018, and the rod you mention is in an F8 category, then your welders wouldn't be qualified. Take a look  at table 4.12(2)

I don't have D1.5 book on hand, so I can't say whether or not that code has limitations.

If I'm missing something, someone please let me know.

Jason
Parent - - By waccobird (****) Date 11-13-2009 10:56
Jason
You are doing good so far, there is a bit more that in the D1.1 gives call to requalify. And the D1.5 is even more stringent in most aspects.
Marshall
Parent - By 803056 (*****) Date 11-13-2009 20:36 Edited 11-14-2009 04:40
You might be well advised to check with "AWS D15.2: 2003 RECOMMENDED PRACTICE
Covers the joining, repair, maintenance, and inspection of rail welds, and welding of related components. Processes include thermite welding and flash welding. Contains a special annex on welding aust..." to see what welder qualifications are typical for work of the nature you describe.

There's no excuse for taking on work without knowing the requirements. The reprecutions of doing it incorrectly can be very serious. The cost of the standard is $60.00.

Best regards - Al
Up Topic American Welding Society Services / Technical Standards & Publications / Railroad Rail Welding repair

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