On , a significant change occurred: the German standards DIN 8570-1 (for linear and angular dimensions) and DIN 8570-3 (for shape and position) were officially superseded. Their replacement was the European and international standard DIN EN ISO 13920:1996 .
In the fields of steel construction, mechanical engineering, and welding fabrication, precision is paramount. However, achieving absolute perfection in manufactured parts is mathematically and physically impossible. To manage variations and ensure that different components fit together seamlessly, engineers rely on standardized tolerance systems.
Because DIN standards are copyrighted intellectual property, official copies of the or its successor, EN ISO 13920 PDF , must be purchased through authorized distributors such as the Beuth Verlag (the official DIN publisher), ISO Store, or IHS Markit.
) expands to balance natural thermal contraction. The permissible variance follows a step-wise distribution curve: For lengths up to Angular Dimension Deviations
Buy the current replacement standard (ISO 13920) at Beuth Verlag . din 8570 b pdf
Welded structures are subject to dimensional changes due to localized heating and cooling. Standard provides a framework of general tolerances for welded fabrications. It specifies linear and angular dimensions, as well as shape and position, to ensure components fit together correctly without requiring excessive machining.
DIN 8570 was largely superseded by ISO 13920 (for general tolerances) and ISO 5817 / ISO 10042 (for weld imperfections). However, many legacy German blueprints and repair manuals still reference DIN 8570 B directly.
Because the standard is withdrawn, no official e-shop will sell it. However, you have three legal avenues:
View archived copies on Scribd (requires subscription). On , a significant change occurred: the German
Ensure your quality control team uses the exact charts matching the nominal size ranges of your specific fabrications to avoid auditing non-conformances.
By standardizing your operations around DIN 8570 B / ISO 13920 B, you guarantee a baseline of structural integrity and precision that satisfies international engineering audits. Share public link
Angular tolerances protect the structural orientation of a weldment (e.g., right angles, flange perpendicularity). The reference point for measurement is always determined by the . Up to 400 mm leg length : Allowed variance is ±20′plus or minus 20 prime (minutes of a degree). 401 to 1000 mm leg length : Allowed variance is ±15′plus or minus 15 prime . Over 1000 mm leg length : Allowed variance is ±10′plus or minus 10 prime . 🏗️ Why Use DIN 8570 Class B in Fabrication? 1. Drawing Simplification
Inspectors use the exact metrics in the PDF to create check sheets for Go/No-Go gauges or Coordinate Measuring Machine (CMM) routines. ) expands to balance natural thermal contraction
Maximum allowable variance; used for non-critical, rough structural applications. Deep Dive: DIN 8570-B Tolerance Metrics
Angular tolerances govern the squareness and orientation of welded joints (e.g., ensuring a post is truly perpendicular to a base plate). These are measured based on the length of the shorter leg of the angle being checked.
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While not identical, (Steel) and ISO 10042 (Aluminum) are the functional successors. Most companies have issued internal bridging documents that map old DIN 8570-B levels to new ISO quality levels (e.g., DIN 8570-B2 ≈ ISO 5817 Quality Level C). Download the ISO 5817 PDF from your national standards body instead.