Multiparametric Welding Equivalent
A mathematical model that combines alloying elements, plate thickness, and process temperature to determine freedom from cracking. It reduces calculation errors in thick-walled pressure vessels.
Physicochemical Mechanism of Action
The multiparametric welding equivalent uses an expanded mathematical method that considers multiple factors. In addition to the usual alloying elements, it also takes into account the plate thickness and the process temperature. These additional parameters enable a more precise calculation of crack freedom.
Metallurgical Relevance & Welding Risks
In thick-walled constructions in pressure vessel fabrication, common welding methods can lead to calculation errors. This error rate is reduced by the multiparametric welding equivalent because it allows a more accurate estimation of crack resistance. Without this method, there is a risk of inadequately welded areas that can lead to cracks and safety issues.
Workshop Practice & Action Instructions
To successfully apply the multiparametric welding equivalent, the following steps must be observed:
1. Determine the alloying elements of the steel being used.
2. Measure the plate thickness of the parts to be welded.
3. Determine the process temperature during the welding operation.
4. Use specialized software or tables to calculate the welding equivalent.
5. Compare the result with the acceptable values for pressure vessels and adjust the process settings accordingly.