Copper
Nickel Alloy
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nickel strip 21
nickel strip 22
nickel strip 20

Chemical Composition

Nickel Silver Chemical Composition and Application Table
Standard Grade
QB / JIS		 Copper
Cu (%)		 Nickel
Ni (%)		 Zinc
Zn (%)		 Iron
Fe (%)		 Application
BZn15-20 / C7521 62.0–65.0 13.5–16.5 About 18–24 ≤0.30 Instrument parts, decorations, connectors
stamped parts
BZn18-18 / C7701 54.0–58.0 16.5–19.5 About 22–30 ≤0.25 Electrical components, springs, antimagnetic elements
welded structures
BZn20-10 / C7451 67.0–71.0 9.0–11.0 About 18–24 ≤0.10 Watch parts, musical instrument parts, medical devices
BZn25-5 / C7351 69.0–72.0 4.0–6.0 About 22–27 ≤0.10 Structural parts, elastic elements
corrosion-resistant components
CuNiZn (General) 62.0–67.0 10.0–20.0 About 13–28 ≤0.20 Jewelry, crafts, antimicrobial alloys

Physical Properties

Nickel Silver Mechanical Properties Table
Standard Grade
QB / JIS		 Temper Vickers Hardness (HV) Tensile Strength (MPa) Elongation (%)
BZn15-20 / C7521Annealed (O)≤100≥340≥35
1/2 Hard120–180440–570≥5
Hard≥150≥540≥3
BZn18-18 / C7701Annealed (O)≤100≥350≥30
1/2 Hard150–210540–655≥8
Hard180–240630–735≥4
Extra Hard210–260705–805—
Super Hard230–270765–865—
BZn20-10 / C7451Annealed (O)≤95≥330≥28
1/2 Hard110–130420–480≥15
Hard≥140≥470—
BZn25-5 / C7351Annealed (O)≤90≥320≥30
1/2 Hard105–125400–460≥15
Hard≥135≥450—
厚度
Thickness (mm)		 公称宽度 < 600mm
Nominal Width < 600mm		 600mm ≤ 公称宽度 < 1560mm
600mm ≤ Nominal Width < 1560mm
JIS G4305 ASTM 240 我司标准 JIS G4305 ASTM 240 我司标准
0.1 ≤ t < 0.2±0.02±0.015±0.01///
0.2 ≤ t < 0.3±0.025±0.02±0.01±0.038±0.038±0.015
0.3 ≤ t < 0.4±0.03±0.025±0.015±0.04±0.04±0.015
0.4 ≤ t < 0.5±0.04±0.03±0.015±0.04±0.04±0.02
0.5 ≤ t < 0.6±0.04±0.03±0.015±0.04±0.04±0.02
0.6 ≤ t < 0.7±0.045±0.035±0.015±0.05±0.05±0.02
0.7 ≤ t < 0.8±0.045±0.035±0.015±0.05±0.05±0.02
0.8 ≤ t < 0.9±0.05±0.035±0.02±0.06±0.06±0.025
0.9 ≤ t < 1.0±0.05±0.035±0.02±0.06±0.06±0.025
1.0 ≤ t < 1.5±0.06±0.04±0.025±0.07±0.07±0.03
1.5 ≤ t < 2.0±0.07±0.04±0.03±0.08±0.08±0.035

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Dongguan Dechuang Hardware Co., Ltd.
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Mobile (WhatsApp): +86-13332617868 (Jane) / +86-17620152277 (Eric)
Email: hcy518@163.com (Jane) / sale2@dgdechuang.com (Eric)
Office Address: Room 2103, Building 8, Vanke Center, No.1 Changqing South Road, Chang’an Town, Dongguan, China
Factory Address: No.6 Shukeng Street, Yanwu Village, Dalingshan Town, Dongguan, Guangdong, China