a German standard specifying general tolerances for linear and angular dimensions, as well as shape and position, in welded structures

• Record standard number, part, edition, publication date, and language.

1. National Archives and Standards Libraries

Many technical universities (e.g., TU Munich, RWTH Aachen) maintain physical standards libraries that include withdrawn DIN norms. Some have digitized them for internal use. If you are a student or partner, you can request a scan.

Understanding DIN 8570 Class B: The "Goldilocks" of Welding Tolerances

This standard simplifies technical drawings by providing default permissible deviations when specific tolerances aren't listed for a weldment.

Accessing the "DIN 8570 B PDF"

Many searches for this topic are attempts to find a free download of the standard. However, it is important to understand the legal and procedural aspects of accessing these documents:

Tolerances in these classes increase as the nominal dimension of the welded part increases. Application and Current Status

• Material grades, chemical/physical properties, hardness ranges, microstructure requirements.