| Property | Value | |----------|-------| | Base material | Steel / Iron | | Coating | Electroplated zinc | | Thickness | 8 µm min. local | | Post-treatment | Blue passivation (Cr⁶⁺ or Cr³⁺) | | Appearance | Bright, metallic with blue tint | | Typical salt spray resistance (red rust) | ~12–24 h | | Typical applications | Interior fasteners, brackets, stamped parts, electronic chassis | | Superseding standard | ISO 2081 – Fe/Zn 8, blue |

: Specifies the minimum coating thickness in micrometers (µm). A thickness of 8 µm is roughly equivalent to 0.00031 inches.

A "B" classification typically indicates a yellow chromate finish. This secondary chemical layer serves two purposes: it significantly enhances the corrosion resistance of the zinc itself and provides a distinct yellowish, iridescent aesthetic. Conclusion When an engineer specifies DIN 50961 Fe/Zn 8/B

, though it remains a common reference in legacy engineering drawings. Google Groups Breakdown of the Designation : The substrate material is iron or steel. : The coating material is electrodeposited zinc.