Dual Phase and Multiphase VDAFree download as PDF File.pdf) or read online for freeBproved surface Surface types to VDA im Surface finishes and center roughness values b xtra smooth e R a ≤ μm g mooth s R a ≤ μm m att m μmμm Surface treatments O iled o UDimensional and shape tolerances unoiled Surface types to VDA Exposed parts E U on exposed parts N / MICROALLOYED STEELS FOR COMPLEX COMPONENT GEOMETRIES, VDA High-strength steels for cold forming with minimum yield strengths up to MPa. Thermome