A: For 90% of weld imperfections, they are identical. ISO 5817 includes a few additional defect types (like hot cracks) and has slightly updated measurement methods.
Drawings would often use combined codes like "DIN 8570-BF" to indicate Class B for dimensions and Class F for geometry. Modern Equivalent: ISO 13920 din 8570 b pdf
“DIN 8570 is withdrawn. We propose using ISO 5817:2023, Quality Level C, which provides equivalent limits for all applicable imperfection types. No change in acceptance quality is expected.” A: For 90% of weld imperfections, they are identical
| Feature | DIN 8570-B | ISO 5817 | |---------|------------|-----------| | Origin | German standard (historical) | International standard | | Current Status | Withdrawn / replaced | Active and widely used | | Quality Levels | B (high), C (medium), D (low) | B (high), C (medium), D (low) | | Content | Weld imperfections limits | Weld imperfections limits | | Relation | DIN 8570-B inspired ISO 5817 | ISO 5817 is the superseding standard | Modern Equivalent: ISO 13920 “DIN 8570 is withdrawn