If you are considering switching from the old standard to the new, here is a direct technical translation.
For class B, the permissible deviation increases with the size of the component (e.g., ±2 mm for 120–400 mm, and up to ±16 mm for lengths up to 20,000 mm). Key Components of the Standard
: It is used to simplify technical drawings by providing default permissible variations for weldments without the need to indicate every individual tolerance. Dimensions Covered
DIN 8570 has largely been replaced or harmonized with international standards (e.g., ISO 5817, ISO 13919). However, many older technical files, maintenance specifications, and German manufacturing guidelines still explicitly require DIN 8570 Beilage B as a reference. din 8570 b pdf
The successor, , combines the scopes of DIN 8570-1 and DIN 8570-3. It is the international benchmark for general tolerances on welded structures. Many companies have transitioned from referencing DIN 8570-B to ISO 13920-B . For designs requiring very high precision, you might specify the "Fine" class (ISO 13920-A).
The DIN 8570-B standard is a critical document for engineers, welders, and quality control managers. It dictates the general tolerances for welded structures, ensuring that fabricated components fit together accurately during final assembly.
DIN 8570-B remains an foundational standard for achieving predictable, reliable, and functional welded assemblies. By specifying a "Medium" linear tolerance class, it allows shops to manufacture complex equipment efficiently without incurring the extreme production costs associated with ultra-tight precision classes. Secure a verified PDF copy of the standard from official channels to ensure your shop floor operations align perfectly with global engineering expectations. If you need help implementing this standard, let me know: If you are considering switching from the old
Dimensional accuracy is a cornerstone of structural integrity in welded fabrications. During the welding process, intense localized heat causes thermal expansion followed by contraction upon cooling. This physical phenomenon inevitably introduces distortion, shrinkage, and alignment deviations.
Medium tolerances. The industry standard for general mechanical engineering, structural steelwork, and common welded fabrications.
⚠️ Avoid free PDF hosting sites (scribd.com, docplayer.net, etc.). Many host scanned copies of the 1993 edition, which violate copyright. More importantly, they may be incomplete or illegible. Dimensions Covered DIN 8570 has largely been replaced
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.
This comprehensive article explores the purpose of DIN 8570, breaks down the significance of tolerance class "B," and provides guidance on how to find and utilize official PDF resources for this standard. What is DIN 8570?
The standard breaks down tolerances into four primary accuracy classes, ranging from high precision to rough structural fabrication: