Re: [MW:10876] RE: Inconel 625 overlay on AISI4140

Dear

For corrosion over lay as per ASME SEC IX LPT, Hardness and Bend test is essential and Chemical analysis required if it is mentioned in WPS
RAVIKUMAR T S
SENIOR ENGINEER-

From: Prakash Hegde <pb.hegde@yahoo.com>
To: <materials-welding@googlegroups.com>
Date: 04/26/2011 10:51 PM
Subject: Re: [MW:10872] RE: Inconel 625 overlay on AISI4140
Sent by: <materials-welding@googlegroups.com>

For Overlay weld ,Only corrosion properties are checked and not any other mechanical test .All mechanical properties are calculated on base metal of the component
Regards
Hegde P.b.

From: ravi <akravi54@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tue, 26 April, 2011 2:33:19 PM
Subject: Re: [MW:10859] RE: Inconel 625 overlay on AISI4140

Dear Mr Moturu,

How are you checking the effect of cyclic loads on the overlay? What kind of testing was carried out?
Regards,
Ravi
On Mon, Apr 25, 2011 at 1:43 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
What is you code of construction, was there any lethal or sour service requirements? Hardness restrictions? Requirement of SCC etc.

What is the tempering temperature of the base material (probably 540 °C is recommended as it should not exceed the tempering temperature), refer the datasheet tempering temperature for this material in the range of 540-680°C

From: venu moturu [mailto:moturuvenu@yahoo.com]
Sent: Sunday, April 24, 2011 10:57 AM
To: materials-welding@googlegroups.com
Cc: Bathula Raghuram (Mumbai - PIPING)
Subject: Inconel 625 overlay on AISI4140

Dear Friends,

Could anyone pl. advice or guide us as we wanted to weld corrosion resistant overlay of Inconel 625 on AISI 4140 on a used sub sea equipment in the oil and gas sector , where in the application demands severe Tensile and cyclic loads on the component . The overlay shall be of approximately 4~5mm on a 100 mm thick section .

The vendor has submitted us two procedures with pulsed GMAW (Auto ) welding process having with and without PWHT . When we referred the procedure with PWHT we found that the procedure is qualified (at 540 degreeC @ soaking time 2hrs and rate of heating 150 degree C/Hr)

can anyone help me out to send the literature with and without PWHT

Best regards
venu

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