18% Nickel-Silver CuNi18Zn20 Commercial Key Blanks (720 MPa Yield)
Engineering Overview: Technical analysis of 18% nickel-silver key blank alloys (CuNi18Zn20), evaluating bitting notch retention and flexural torsional strength.
Technical & Engineering Specifications
| Alloy Grade | CuNi18Zn20 (18% Nickel-Silver / German Silver) |
|---|---|
| Application | Master Keys, High-Traffic Commercial Suites |
| Tensile Strength | 720 MPa Ultra-High Yield |
| Vickers Hardness | 180 - 200 HV Micro-Hardness |
Commercial Key Blank Metallurgy
Commercial master key suites require key blanks that resist cyclic bending fatigue.
CuNi18Zn20 Properties
- Tensile Strength: 700 to 750 MPa (vs 400 MPa for brass).
- Bitting Wear: Retains $\pm 0.01\text{ mm}$ bitting tolerances over 100,000 key insertions.
Frequently Asked Engineering & Selection Questions
Q1: What are the primary material characteristics of this finish?
Technical analysis of 18% nickel-silver key blank alloys (CuNi18Zn20), evaluating bitting notch retention and flexural torsional strength.