Is heat treatment required for spot welding on a 1Cr9Moφ127×10 pipeline?
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Is heat treatment required for spot welding on a φ127×10 pipeline made of 1Cr9Mo?
Spot welding usually does not require heat treatment
If heat-resistant steel electrode R507 is used, preheating to 200 degrees is required before welding, followed by heat treatment that must be completed within 24 hours after welding. Additionally, per the requirements for heat treatment, the same weld area cannot undergo more than 2 rounds of heat treatment. Using austenitic welding rod A307 is quite simple; spot welding is sufficient, and there are no special requirements. I recommend using this method!
Although it is a high-pressure pipe, heat treatment may not be required.