Pretex® stands for PREcision TEXturing, the innovative surface structure for coldrolled and galvanised steel sheets, newly developed by Salzgitter Flachstahl. Pretex® is a registered trade mark and is protected internationally. The surface morphology of the sheet is a major quality feature of the product and significantly influences forming behaviour, adhesion and optical characteristics of the car body painting.
With Pretex® focar®, a development of our Pretex® surface, we have significantly reduced the undulation values while keeping the same roughness and high peak count.
Exact reproducibility of the roughness values through use of state-of-the-art electronic process control
Improved forming characteristics
Excellent paintability even for vertical application resulting from extremely high peak counts and the stochastic distribution of the roughness structure
Avoids orange peel and rough surface samples due to the Moiré-effect
|Properties||ZE; ZE + P (EG; EG + P)||Z (GI)|
|Steel grades||VDA-Norm||CR4 - CR5 …..(all IF), CR180BH, CR210BH||CR3 - CR5….. (all IF), CR180BH|
|Zinc layer thickness||ZE 50/50 – ZE 75/75||Z100 – Z140|
|Surface finish||B/BP (O)||MC (O)|
|Mean rough index (Ra according to DIN EN 10049)||µm||0,9 – 1,4||0,9 – 1,4|
|Peak counts (RPc according to DIN EN 10049)||cm-1||> 75||> 75|
|Wsa 1-5 – Delivery condition||µm||≤ 0,34||≤ 0,29|
|Wsa 1-5 – Formed in Marciniak-tool1||µm||≤ 0,35||≤ 0,35|
|Wa 0,8 – Formed in Marciniak-tool1||µm||≤ 0,5||≤ 0,5|