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PWHT TEMPERATURE OF DISSIMILAR MATERIAL

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212197

Mechanical
Jun 2, 2007
124
IN
I have to weld SA 592 Gr F material with SA 516 Gr 70 material. The joint requires PWHT.

PWHT Temp of SA 592 Gr F - 540 TO 595 Degree cel.
PWHT temp of SA 516 Gr 70 - minimum 595

Which temperature should we follow?

We can not have 595 exactly as the temperature shall always have tolerance , e.g. + - 10 degree cel.
 
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Per asme VIII, Div1 you can increase hold time at lower temps.
 
Generally, the higher PWHT should be followed. Customer specifications will usually dictate otherwise.

The devil is in the details; she also wears prada.
 
DVWE is absolutely correct. But you do not face any issues, 595 qualifies for both.

DHURJATI SEN
Kolkata, India


 
What say the welding procedure ?.
Be care. See ASME VIII Div. 1 Part UHT

Regards
 
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