What's post heating temperature?

Question

Accepted Answer

Post heating temperature is the temperature at which a material is heated after welding to relieve residual stresses and prevent cracking.

Post heating temperature is typically lower than the preheating temperature used before welding.
It is commonly used in welding processes such as pipeline construction and pressure vessel fabrication.
The purpose of post heating is to slow down the cooling rate of the welded material, allowing it to gradually cool and reduce the risk of brittle fracture.
Post heating is particularly important for materials with high carbon content or those prone to hydrogen cracking.
The specific post heating temperature and duration depend on the material being welded and the welding procedure being used.
For example, in pipeline welding, the post heating temperature may range from 100 to 300 degrees Celsius and is maintained for a specific time period.
Post heating is often performed using methods such as electrical resistance heating, induction heating, or furnace heating.

Accepted Answer

350°

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