From Factory Electrum C7521/CuNi18zn20 Strip for Crystal Resonator Shell

• Customization: Available
• Product Type: Strip
• Material: Cu,Ni,Zn
• Model NO.: C7521
• Carbon Content: Low Carbon
• Condition: Bright
• Density g/cm3: 8.7
• Electrical Conductivity %Iacs: 5
• Thermal Conductivity W/(M.K): 32
• Modulus of Elasticity Gpa: 125
• Specific Heat J/(G.K): 0.34
• Machinability: Suitable
• Electric Plating Property: Excellent
• Hot DIP Tin Plating Property: Excellent
• Weldability: Good
• Transport Package: in Coil, Carton, Wooden Case, Pallet
• Specification: RoHS, SGS
• Trademark: Ualloy
• Origin: Zhejiang, China
• HS Code: 74094000
• Production Capacity: 500tons/Year

Product Description

From factory Electrum C7521/CuNi18Zn20 strip for crystal resonator shell

Copper-Nickel-Zinc alloy, also called nickel silver, German silver, new silver, nickel brass, albata, or electrum, is a copper alloy with nickel and often zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated.
 
Features:
1) Good color
2) High toughness
3) High strength
4) High stability
5) Excellent elasticity with fine silver gloss
6) Good fatigue
7) Rust and corrosion resistance properties
8) C7521 and C7701 have very good deep-drawing performance 
 
Main application:
Copper-nickel-zinc alloy strip is widely used in antenna, cellphone shielding case,crystal resonator shell, silverware, jewelry, glasses, medical apparatus and instruments, zipper and keys' industry.
 
Mechanical Properties
 

Symbol or Brands			Temper	Tension test			Hardness test		Chemical Composition
GB	JIS	UNS		thickness mm	tensile strength MPa	elongation%	thickness mm	Vickers Hardness HV	Cu	Ni	Zn
Bzn18-18	C7521	C75200	0	0.08-10.0	≥375	≥20			63.5-66.5	16.5-19.5	Balance
			1/2H	0.08-10.0	440-570	≥5	≥0.06	120-180
			H	0.08-10.0	≥540	≥3	≥0.06	150-200
Bzn18-26	C7701	C77000	1/2H	0.08-10.0	540-655	≥8	≥0.06	150-210	53.5-56.5	16.5-19.5	16.5-19.5
			H	0.08-10.0	630-735	≥4	≥0.06	180-240
			EH	0.08-10.0	705-805		≥0.06	210-260
			SH	0.08-10.0	765-865			230-270