S235JR and ST37 are very similar materials, both used for general structural applications, but S235JR is considered slightly better due to the following reasons:
Standardization:
S235JR: It follows the European standard EN 10025-2, which is more widely accepted and used internationally. This standard is more modern and consistent in its requirements, ensuring higher quality control.
ST37: An older German standard (DIN 17100), which has been largely replaced by the EN standards.
Availability and Recognition:
S235JR is more commonly available and recognized globally. This makes it easier to source and use in international projects.
Quality Assurance:
S235JR may come with better traceability and documentation, which is increasingly important in modern engineering and construction projects.
In general, if you have the option, S235JR is the better choice due to its modern standardization, wider availability, and global recognition. However, for many basic structural applications, either material would be adequate.
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