PWHT TEMPERATURE OF DISSIMILAR MATERIAL

[212197]

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.

 

[weldstan]

Per asme VIII, Div1 you can increase hold time at lower temps.

 

[DVWE]

Generally, the higher PWHT should be followed. Customer specifications will usually dictate otherwise.

The devil is in the details; she also wears prada.

 

[Dhurjati Sen]

DVWE is absolutely correct. But you do not face any issues, 595 qualifies for both.

DHURJATI SEN
Kolkata, India

 

[r6155]

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

Regards