[MW:34820] RE: 34813] Clarification in Rate of heating and cooling.

Hello,

 

Please see the response below.

 

Regards.

 

P. Goswami, P. Eng, IWE.

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Gopalakrishnan G
Sent: Friday, March 15, 2024 2:39 AM
To: materials-welding@googlegroups.com
Subject: [MW:34813] Clarification in Rate of heating and cooling.

 

dear expert

I have to do WPS and PQR details given below

 

Test coupon

Thickness -50 mm

Material - IS 2062 E 350 C 

Code - ASME 

Position - 3G

Process - SMAW 

Electrode - E-7018

Impact = -20C @ 27J

Stress Relieving - 605+/- 10c

Rate of heating/cooling- 100c/hr.

 

Whether if Rate of heating / cooling is 100c/hrs will it affect the test result both UTS and Impact properties? : No, It's the Exposure time at the PWHT Temperature which matters most towards the UTS & Charpy Impact values. As a matter of fact, there is no need to maintain a cooling rate of 100⁰C/hr. You may increase the cooling rate to 150Deg C /hr or more.

 

As per UCS 56 ASME SEC 8 div 1 Max rate of heating and cooling 222c/hrs divided by max.metal thickness.

 

As my client need Rate of heating and cooling 100c/hrs.

 

Plz kindly clarify.

 

 

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