For a 10 mm thick aluminium butt weld:
ISO 10042 is an international standard that specifies the requirements for the preparation of technical drawings and documentation, particularly for the aerospace industry. The standard provides guidelines for the creation of technical drawings, including the use of symbols, abbreviations, and notation. iso 10042 pdf
| Quality Level | Max. single pore diameter | Max. porosity (%) in cross-section | |---------------|---------------------------|-------------------------------------| | B (stringent) | 0.5 mm | 1% | | C (intermed.) | 1.0 mm | 2% | | D (moderate) | 2.0 mm | 4% | For a 10 mm thick aluminium butt weld:
The core of the ISO 10042 standard is its classification system for imperfections. It uses three letters to denote the stringency of the requirements: including the use of symbols