How long does it take for a 3D welding table to stabilize after being leveled?

1. Post-straightening low-temperature stress-relief tempering
If a tempering process involving holding at 300°C for 30 minutes is performed after straightening, most of the new internal stresses induced by the straightening process will have been eliminated. Full stability can be achieved after a holding period of 7 to 15 days; natural aging on a flat, well-ventilated surface is sufficient.

2. Mechanical straightening only (no stress-relief tempering)
Cold straightening without subsequent tempering leaves residual internal stresses. A natural aging period of 20 to 30 days is required to allow these stresses to gradually dissipate and for dimensional accuracy to fully stabilize. Once stabilized, flatness must be re-verified to ensure there are no deviations before the component is put into service.

3. Combined mechanical and flame straightening
When stress-relief tempering follows combined straightening, full stability is generally achieved within 10 to 20 days. However, if the storage environment is subject to significant temperature fluctuations (e.g., a workshop temperature variation exceeding 10°C), it is advisable to extend the period by 3 to 5 days to ensure more complete stress relief.