Saturday, August 7, 2010

[MW:6352] Re: HARDNESS ON SS WELDING

Dear Srinivas,

The lower hardness is due to dilution effect, because you are using
309L consumable in between.

You can achieve the required hardness as per following procedure.

First Layer with E-7018

Deposit first layer with E-309L, grind the half of the bead
height(Half Bead Grinding)

Deposit the second layer (Again grind the half), then deposit at least
two to three layers with final hardfacing electrode.

In other words final layer should not be diluted much with 309 weld
metal.

Regards


Jaspal Singh, CWI-AWS, CSWIP-3.1
Assistant Manager – Quality Assurance
Process Equipment Division
ISGEC, Yamuna Nagar, Haryana -135001
Phone: 911732307251
Ext: 251 Mb: +918930111441

On Aug 7, 7:23 am, gaddam Srinivas <sri_nivas...@yahoo.co.in> wrote:
> Dear Sir,
>  
> One layer MS electrode 7018 and 2 layers of SS-309 grade electrode is being used to fill the gaps, and finally hardfacing electrode of 60 RC (appplication) fabricators of ID fans. They are using the above combination to join MS plate to hardfaced wearplate, now the problem is, the hardness of the hardfacing electrode when directly tested, it is coming 60 RC and when it is used as a final layer on SS 309 grade electrode it is coming 35 RC. They require the hardness of 60 RC but they cannot change the process of using 7018 and 309 as it is mentioned in the drawing. Now how can they get the 60 RC, whether they have to change the welding sequence or any other solution plealse let me know.
>  
> Thanks & Best REgards
> Srinivas

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