Product Standards for Nickel Silver Copper Alloy

（1）Chemical Composition（Meets RoHS）

Type No.	Alloy No.	Symbol	Chemical Composition				Features & Application
		Plate Ribbon	Cu	Mn	Ni	Zn
Nickel Silver Alloy	C7521	C7521P C7521R	62.0~ 66.0	0~ 0.50	16.5~ 19.5	Remainder	Features: Good color, high toughness, high strength, high stability, excellent elasticity with fine silver gloss, good fatigue, rust and corrosion resistance properties. C7521 and C7541 have very good deep-drawing performance. Application: Shielding material for communication electronics, antenna material, EMI-shielding material, spring contact, flexible terminal, environmentally-friendly plating-free electronic parts and components, quartz oscillator, high-level material and electric material.
	C7541	C7541P C7541R	60.0~ 64.0	0~ 0.50	12.5~ 15.5	Remainder
	C7701	C7701P C7701R	54.0~ 58.0	0~ 0.50	16.5~ 19.5	Remainder

（2）Mechanical Properties

Alloy No.	Quality Grade	Symbol	Mechanical Properties
		Plate Ribbon	Tensile Strength (Kgf/mm^2)	Elongation	Hardness Test
					JIS Standards	Minchali
C7521	O	C7521P-O C7521R-O	≧38	≧20	—	≧110
	1/4H	C7521P-1/4H C7521R-1/4H	38~46	≧10	—	110~140
	1/2H	C7521P-1/2H C7521R-1/2H	44~52	≧5	120~180	130~160
	3/4H	C7521P-3/4H C7521R-3/4H	—	—	—	—
	H	C7521P-H C7521R-H	52~60	≧3	＞150	150~180
	EH	C7521P-EH C7521R-EH	≧58	—	—	≧180
	SH	C7521P-SH C7521R-SH	—	—	—	—
C7541	O	C7541P-O C7541R-O	≧36	≧20	—	≧110
	1/4H	C7541P-1/4H C7541R-1/4H	—	—	—	—
	1/2H	C7541P-1/2H C7541R-1/2H	42~55	≧5	110~170	110~150
	3/4H	C7541P-3/4H C7541R-3/4H	—	—	—	—
	H	C7541P-H C7541R-H	≧50	≧3	＞135	≧135
	EH	C7541P-EH C7541R-EH	—	—	—	—
	SH	C7541P-SH C7541R-SH	—	—	—	—
C7701	O	C7701P-O C7701R-O	—	—	—	—
	1/4H	C7701P-1/4H C7701R-1/4H	—	—	—	—
	1/2H	C7701P-1/2H C7701R-1/2H	55~67	≧8	150~210	140~200
	3/4H	C7701P-3/4H C7701R-3/4H	—	—	—	—
	H	C7701P-H C7701R-H	64~75	≧4	180~240	175~220
	EH	C7701P-EH C7701R-EH	72~82	—	210~260	195~240
	SH	C7701P-SH C7701R-SH	78~88	—	230~270	210~250