Dear Mauricio,
Please provide code of construction.
In general ASTM A335 P91 requires PWHT for all thickness. For more detail, specify the code of construction and application.
For filler material, it is suggested to use E9018-B9 (SFA 5.5) for SMAW & ER90S-B9 (SFA 5.28) for GTAW processes. Both the filler materials shall meet the minimum yield and tensile strength of WPHY-70.
Precautions such as preheating of 250ºC and post heating of 300ºC for ½ to 1 hour would reduce problems related to hydrogen induced cracking. After post heating, PWHT shall be carried out in accordance with design code.
Regards,
L. Prabhu kumar,
Sr. Principal Engineer,
Equipments & Materials Dept.,
Saipem India Projects Limited,
Tel:+91 44 43906588, Ext.: 588, Fax:+91 44 66840345,
Mobile Ph. No.: +91 9003010978.
From:
Sent: Monday, June 07, 2010 3:01 AM
To:
Subject: [MW:5416] welding A335 P91 with Carbon steel
| Sirs, I have a question about welding dissimilar material: One Metal: A335 P91 ---------------------------------- PNumber 15E Second Metal MSS SP75 WPHY-70 --------------- Snumber 1 Wall thickness 36.53 mm Which ones are the best FILLER METAL for GTAW? Which ones are the best FILLER METAL for SMAW? Is it necessary PWHT? Please give a tips. Best Regards Mauricio |
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