Fw: [MW:16806] REGARDING HARDNESS REQUIREMENT FOR SS410S WELD OVERLAY

Dear All,
This has reference to trailing mail,

My client is asking hardness 88 RB max.on SS410 S weld overlay.

Whether is it pratically possible?

Your quick opinion on this issue is requested.

Thanks in advance.

Vinit

--- On Fri, 15/2/13, vinit vani <vinit_vani@yahoo.co.in> wrote:

From: vinit vani <vinit_vani@yahoo.co.in>
Subject: [MW:16777] REGARDING HARDNESS REQUIREMENT FOR SS410S WELD OVERLAY
To: materials-welding@googlegroups.com
Date: Friday, 15 February, 2013, 4:15 PM

Requesting Expert views on following case.

Design Code.: ASME SEC VIII DIV.1
               MOC : SA387 GR.11 CL.1 + SA 240 GR.410S CLAD
               THK.   : 60.0 mm + 4.0mm

Clad restoration by E309 LMO(Barrier Layer) + E410(Subsequent Layers) welding electrodes.
Undiluted chemistry at 2/3 depth from the top shall meet with restriction Carbon Content 0.06% Max., Nickel Content 0.7% Max.Chromium Content 11 to 13.5%.

Can we achieve hardness 88RB (176 BHN)on weld overlay of SS 410S after taking all care of Pre heat(150°C min.),Post heat (300 - 350°C@ 2 Hrs.) and PWHT (700°C@3 Hrs.). OR How much we can get?

As per my Qualified Welding Procedure Hardness could achieve Between       240 to 260 BHN.

Please share your experience.

Regards,

VINIT

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