P11 material hardness value

[Chiranjeevi A]

Dear experts,

We have an issue in the hardness value for P11 material of pipe.

If the value exceeds what are the matigations required.

Kindly advice

Thanks and Regards

chiranjeevi

[james gerald]

Pls provide some additional details.

Hardness values obtained.

Base Pipe/ PQR / Production Hardness

Thanks & Regards

J.Gerald Jayakumar

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[Chiranjeevi A]

Dear james,

Good morning, 

Please find the below details, the following issue is related to the boiler steam drum tubes

  Base Tube material: A213 T11

  Obtained hardness value after PWHT : 380HB

  WPS value: 238HB

  

Thanks & regards

Chiranjeevi Anil

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[james gerald]

Please give some details regarding below, as anyone in the Group may provide solution to you.

1. Hardness Location (Weld & HAZ)

2. Type of Hardness Test, Vicker's, Brinell or Rebound Hardness Tester.

3. PWHT cycle, soaking temperature, Time, Heating Rate & Cooling Rate.

4. Welding Heat Input

5. Maximum temperature in The Tubes(steam)

6. Any additional details which you may feel may be useful.

380HB is way out of Rectification and let's seek experts advise.

Thanks & Regards

J.Gerald Jayakumar

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[Chiranjeevi A]

Dear James,

Thank you for your support,

Please find the below details highlighted in red

1. Hardness Location (Weld & HAZ) = Base material, weld metal and HAZ

 

2. Type of Hardness Test, Vickers’s, Brinell or Rebound Hardness Tester.= Rebound Hardness Tester

 

3. PWHT cycle, soaking temperature, Time, Heating Rate & Cooling Rate. =

                Heating rate/temperature­­­ ---- Soak (Holding) temperature/ time ---- Cooling rate/temperature

                Heating rate/ Cooling rate = 100 degree centigrade per hour

                Soaking temperature =710 degree centigrade for 2 hours

               

4. Welding Heat Input = 

This is: Time X Volts X Amps / 1000 joules X Travel Speed

Time: 60 sec/min

Volts: 12V – 14V

Amps:  98 – 175amps

Travel speed : 60 – 130 mm/min

5.  Maximum temperature in The Tubes(steam)   = 550 to 560°C

Thanks & Regards

Chiranjeevi Anil

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/704379070.542037.1650879987897%40mail.yahoo.com.

[james gerald]

Your PWHT temperature is little higher and too your soaking time as it is a function of Thickness

Thanks & Regards

J.Gerald Jayakumar

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAN4%2Bm0wHFw7cnz25rKHrXN90QuvDw48b9izEQZ8P82DrX9-oPw%40mail.gmail.com.