Difficulty: Easy
Correct Answer: no silver
Explanation:
Introduction / Context:
Trade names can be misleading. “German silver” or “nickel silver” is widely used in decorative hardware and instrument fittings. Understanding its actual chemistry prevents wrong assumptions about conductivity, cost, and corrosion behavior.
Given Data / Assumptions:
Concept / Approach:
Despite its name, German silver contains no elemental silver. It is typically a ternary alloy of copper (major), nickel (to impart a silvery color and strength), and zinc (to adjust properties and cost). The name stems from its silvery appearance, not composition. Presence of actual silver would raise material cost substantially and alter properties like tarnish behavior and electrical conductivity. Nickel silver is valued for color stability, formability, and corrosion resistance in mild environments, but it does not have the noble metal characteristics of true silver alloys.
Step-by-Step Solution:
Verification / Alternative check:
Material standards list compositions such as Cu 60–65%, Ni 10–20%, Zn balance, with Ag not specified; suppliers market it as “nickel silver” precisely to avoid confusion with sterling silver (Ag–Cu).
Why Other Options Are Wrong:
Common Pitfalls:
Assuming color implies noble-metal content; confusing “nickel silver” with “silver-plated” products where only a thin Ag coating is applied.
Final Answer:
Discussion & Comments