Assessing the surface

Assessment is to be performed in a defined light cabinet or equivalent. The extrusion is to be angled towards the light source. The Distance scale is placed next to the extrusion.

The viewing distance is determined by the ‘Assessment of faults’ table. If, for example, there is a catching mark on a surface that has been marked as surface 3, the viewer must move back until the top line can no longer be read. It must still be possible to read the bottom line at B3 on the Distance scale. Look at the surface of the extrusion for 5 seconds. If it is not possible to detect any deviations, the surface is acceptable.

Miscellaneous

If there are other, customer-specific requirements concerning the appearance of surfaces, then surfaces must be checked using a gauge or similar. This may apply to brushed surfaces, for example.

Class Definition Typical areas
of application
Production Usable alloys Viewing distance and time
1 Scratches, catching marks or other physical damage must not be visible during inspection as per B1 – 5 seconds. Decor strips for radios/TVs, etc. with very high surface requirements. Individual handling at all stages. Only small parts of an extrusion may be classed as surface 1. The runout surface must have a lower surface requirement. Visible surfaces are to be protected by packaging. Die-lines are not acceptable. EN AW-6060
EN AW-6063
EN AW-6101
B1 – 5 seconds.
Welding zones and heating zones for anodised extrusions. Decor strips for radios/TVs, etc. with very high surface requirements. Individual handling at all stages. Only small parts of an extrusion may be classed as surface 1. The runout surface must have a lower surface requirement. Visible surfaces are to be protected by packaging. Die-lines are not acceptable. EN AW-6060
EN AW-6063
EN AW-6101
B2 – 5 seconds.
2 Scratches, catching marks or other physical damage must not be visible during inspection as per B2-5 seconds. Shower cabinets, furniture, fittings, parts with high decorative requirements, etc. Individual handling at all stages. The runout surface must have a lower surface requirement. Visible surfaces are to be protected by packaging. Die-lines are not acceptable. EN AW-6060
EN AW-6063
EN AW-6101
B2 – 5 seconds.
Welding zones and heating zones for anodised extrusions. Shower cabinets, furniture, fittings, parts with high decorative requirements, etc. Individual handling at all stages. The runout surface must have a lower surface requirement. Visible surfaces are to be protected by packaging. Die-lines are not acceptable. EN AW-6060 EN AW-6063 EN AW-6101 B3 – 5 seconds.
3 Scratches, catching marks or other physical damage must not be visible during inspection as per B3 – 5 seconds. Structural systems, facades, doors, windows, etc.. If production so requires, visible surfaces can be laid together. Visible surfaces are to be protected by packaging. Die-lines are generally not acceptable; assess on a case-by-case basis. EN AW-6060
EN AW-6063
EN AW-6101
(EN AW-6005)
B3 – 5 seconds.
Welding zones and heating zones for anodised extrusions. Structural systems, facades, doors, windows, etc. Visible surfaces can be laid together during packaging if they are anodised. Die-lines are generally not acceptable; assess on a case-by-case basis. EN AW-6060
EN AW-6063
EN AW-6101
(EN AW-6005)
B4 – 5 seconds.
4 Scratches, die-lines, catching marks or other physical damage must not be visible during inspection as per B4 – 5 seconds. Outdoor steps, scaffolding, etc. Extrusions can be laid together at all stages. Die-lines can occur. EN AW-6060
EN AW-6063
EN AW-6101
EN AW-6005
EN AW-6351
EN AW-6082
B4 – 5 seconds.
Welding zones and heating zones for anodised extrusions Outdoor steps, scaffolding, etc. Extrusions can be laid together at all stages. Die-lines can occur. EN AW-6060
EN AW-6063
EN AW-6101
EN AW-6005
EN AW-6351
EN AW-6082
B5 – 5 seconds.
5 Only dimensional and strength requirements. Corner brackets, fence posts. Here there are no requirements for surface appearance. However, any defects must not be such that they could cause personal injury. EN AW-6060
EN AW-6063
EN AW-6101
EN AW-6005
EN AW-6351
EN AW-6082