BMW GS 97034-9 - Scratch test (accredited)

Our test laboratory performs testing in accordance with the BMW standard GS 97034-9 under accredited procedures. This scratch test for automotive interior materials is used for the standardized determination of surface resistance to mechanically induced scratching. The methodology is specifically designed to assess the suitability of coated, painted, uncoated, and laminated interior surfaces that may come into contact with hard or sharp-edged objects such as rings, keys, or tools during everyday vehicle use.

During the scratch test according to BMW GS 97034-9, standardized specimens are examined under defined boundary conditions. The test stylus is drawn across the component surface at a constant speed with progressively increasing load levels. Using an Erichsen scratch tester, defined force values are applied sequentially, with each load level applied once to the surface in order to evaluate damage behavior through gradual load increase. Scratch length, speed, and orientation are precisely specified to ensure reproducible results. The resulting damage is then visually inspected and, where necessary, assessed under magnification and classified according to defined evaluation criteria.

The results provide characteristic values for the resistance and scratch performance of various materials and surface structures used in automotive interior components, particularly high-contact areas such as dashboards, door trims, or decorative elements.