Hard-facing overlay versus Corrosion resistent overlay

[Fernando Gameiro]

Dear All,

 

According to ASME IX the difference between Hard-facing overlay and Corrosion resistant overlay is limited to the type of tests that is required on PQR and WPS ?

 

According to ASME, how to define if certain overlay is a Corrosion resistant or a Hard-face?

 

Thanks

 

Fernando Gameiro

[Muhammed Ibrahim PK]

Hi,

 

corrosion resistant overlay applying to prevent corrosion of equipment when corrosive chemical service.

hard facing overlay applying to prevent wear when contact with another metal. eg. bearings, wear plate.

Thanks & Regards
Muhammed Ibrahim PK

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[Christopher M Gerold]

Depends on the application of the finished or intended weld.

Chris M. Gerold
QA - NDE Specialist
Dairyland Power Cooperative
3200 East Avenue South
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"The significant problems we face cannot be solved by the same level of
thinking that created them." - Albert Einstein

From: Fernando Gameiro <fgam...@velan.pt>

To: "material...@googlegroups.com" <material...@googlegroups.com>

Date: 07/01/2010 11:20 AM

Subject: [MW:5814] Hard-facing overlay versus Corrosion resistent overlay

Sent by: material...@googlegroups.com

Dear All,

Thanks

Fernando Gameiro

[Harish Kannepalli]

Dear Fernando,

                     Hard facing overlay is for wear resistance applications, where continuous rupture of the part is involved. Incase of ,corrosion resistant overlays, its purely for acidic or alkali resistance applications. At times some overlays are hard facing as well as corrosion resistant.

            In hard facing overlays, hardness is an important feature. In corrosion resistant overlays, bonding of base metal, chemistry of layers are some of the important features.

regards,

Harish.

2010/7/1 Fernando Gameiro <fgam...@velan.pt>

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[Fernando Gameiro]

Thank you,

 

Is that “thinking” well and clear defined on any code, with real figures like hardness or  ferrit number or what else?

 

Regards

Fernando Gameiro