C S Holdings Limited

Wrought Copper

WE are Authorized Distributor of a great variety of Japanese high-quality copper alloy, including Beryllium copper, Phosphor Bronze, OFC, Titanium Copper, Leadframe Alloys in the market.
Long term business partners including Furukawa, NMC, NGK, Dowa, Mitsubishi, Hitachi, etc.

Wrought copper alloys are produced in various mill-product forms for a variety of applications due to their high electrical conductivity, corrosion resistance, ease of fabrication, and good heat-transfer properties.

Major types:

Oxygen Free Copper

Phosphor Bronze

Beryllium Copper

Nickel Silver

Titanium Copper

Particular Copper Alloys

Wrought copper is obtained after being subjected to various mechanical processes including rolling, extruding and forging etc. It also means that the solid metal was processed into its final shape -including sheets, plates, bars, tubing.

Characteristics: Minimum 99.9% Cu composition
Excellent electric and heat conductivity
Soft copper
Applications: Electric parts, FPC
Major Types: C1020, 1100

Name	Alloy No.	Chemical Composition %
Name	Alloy No.	Cu	Pb	Fe	Sn	Zn	Al	Mn	Ni	P	Cu+Al+Fe+Ma+ni
Oxygen free copper	C 1020	99.96 min	-	-	-	-	-	-	-	-	-
Tough-pitch copper	C 1100	99.90 min	-	-	-	-	-	-	-	-	-

Name	Alloy No.	Temper Grade	Vickers Hardness (HV)	Tensile Strength (N/mm²)	Elongation (%)	Electrical Conductivity (%\ACS)
Oxygen free copper & Tough-pitch copper	C 1020 C 1100	0	-	195 min	35 min	100
		1/4 H	55 to 100	215 to 275	25 min	100
		1/2 H	75 to 120	245 to 315	15 min	98
		H	80 mins	275 min	-	97

Phosphor bronze is a copper alloy containing both tin and phosphorus. It is a fatigue-resistant and highly valuable alloy, specialty metal with many positive attributes.

Different types and compositions of phosphor bronze enables the material to have good strength and excellent elasticity. The corrosion resistance and electrical conductivity characteristic make this alloy widely used in different applications.

Characteristics: Cu + Sn +P Alloy
Good conductivity, solderability, palatability,
strong spring and elasticity
Fatigue-resistant copper alloy
Applications: Connectors, Switch parts, Springs, Electronic parts
Major Types: C5191, C5210, C5240

Name	Alloy No.	Chemical Composition %
Name	Alloy No.	Cu	Pb	Fe	Sn	Zn	Al	Mn	Ni	P	Cu+Al+Fe+Ma+ni
Phosphor Bronze for spring	C5210	-	0.05 max.	0.10 max.	7.0 to 9.0	0.20 max.	-	-	0.03 to 0.35	99.7 min.	-

Name	Alloy No.	Temper Grade	Vickers Hardness (HV)	Tensile Strength (N/mm²)	Elongation (%)	Electrical Conductivity (%\ACS)
Phosphor Bronze	C5191	0	-	min 315	42 min	14
		1/4H	100~160	390~510	35 min
		1/2H	150~205	490~610	20 min
		H	180~230	590~685	8 min
		EH	min 200	min 635	5 min
	C5210	1/2 H	140 to 205	470 to 610	27 min	12
		H	185 to 235	590 to 705	20 min
		EH	210 to 260	685 to 785	11 min
		SH	230 to 270	735 to 835	9 min
	C5240	H	200~240	650~750	11 min	10
		EH	230~270	750~850	9 min
		SH	260~300	850~950	5 min
		ESH	290 min	950 min	-

Beryllium Copper is the ideal spring material because of its high mechanical strength and favorable elastic modulus. Making full use of the excellent spring properties, beryllium copper can downsize a phosphor bronze spring part while the contact force remains the same. This may also lead to downsizing of plastic parts or terminals around it, thus, it can expect cost saving in total.

Characteristics: Cu + Be + Co + Ni Alloy
High electrical conductivity, high fatigue strength, good formability
Non-magnetics copper alloy
Applications: Connectors, Switches, Micromotors, Relay
Major Types: Alloy 7, Ally 8, Ally 11, Alloy 25, GMX96

Name	Alloy No.	Chemical Composition %
Name	Alloy No.	Be	Mn	Ni	Ni+Co	Ni+Co+Fe	Al	Cu+Be+Ni+Co+Al	Cu+Be+Ni	Cu+Be+Ni+Co+Fe
Copper Beryllium alloy for spring	Alloy 7	0.20~0.40	-	-	1.80~2.50	-	0.60 max	99 min	-	-
	Alloy 8	0.20~0.60	-	1.40~2.20	-	-	-	-	99.5 min.	-
	Alloy 11	0.20~0.60	-	1.40~2.20	-	-	-	-	99.5 min.	-
	Alloy 25	1.80~2.00	-	-	0.20 min.	0.60 max.	-	-	-	99.5 min.

Name	Alloy No.	Temper Grade	Vickers Hardness (HV)	Tensile Strength (N/mm²)	Elongation (%)	Electrical Conductivity (%\ACS)
Copper Beryllium alloy for spring	Alloy 7	0	90 to 160	410 to 540	35 min	-
		1/4H	145 to 220	510 to 620	10 min	-
		1/2H	180 to 240	590 to 695	5 min	-
		H	210 to 270	685 to 835	2 min	-
	Alloy 8	HT	210 to 260	700 to 870	5 min	60 min
	Alloy 11	HT	230 to 280	760 to 965	5 min	50 min
	Alloy 25	0	90 to 160	410 to 540	35 min	-
		1/4H	145 to 220	510 to 620	10 min	-
		1/2H	180 to 240	590 to 695	5 min	-
		H	210 to 270	685 to 835	2 min	-

Nickel Silver is a copper alloy with nickel and often zinc. It is named due to its silvery appearance, but it contains no elemental silver unless plated. The importance of these alloys lies in their color, ductility, good mechanical properties, and suitability for working in a wide variety of cast, rolled and extruded, or drawn shapes. Such alloys resist corrosion better than does brass but tarnish slowly through the action of sulfur in the air.

Characteristics: Cu + Ni + Zn Alloy
Silver -White luster excellent strength and elasticity
Good corrosion resistance and workability
Applications: Contact springs, Switches, Optical parts,
Camera parts, Watch dials, etc
Major Types: C7701, C7521, C7541

Name	Alloy No.	Chemical Composition %
Name	Alloy No.	Cu	Pb(1)	Fe	Sn	Zn	Mn	Ni(2)	P	Cu+Sn+P
Nickel Silver	C 7701	54 to 58.0	0.10 max.	0.25 max.	-	Remainder	0 to 0.5	16.5 to 19.5	-	-
	C 7521	62.0 to 66.0	0.10 max.	0.25 max.	-	Remainder	0 to 0.5	16.5 to 19.5	-	-
	C 7541	60.0 to 64.0	0.10 max.	0.25 max.	-	Remainder	0 to 0.5	12.5 to 15.5	-	-

Name	Alloy No.	Temper Grade	Vickers Hardness (HV)	Tensile Strength (N/mm²)	Elongation (%)	Electrical Conductivity (%\ACS)
Nickel Silver for spring	C7701	1/2 H	150 to 210	540 to 655	Plate 8 min	5.5
		1/2 H	150 to 210	540 to 655	Strip 11 min
		H	180 to 240	630 to 735	Plate 4 min
		H	180 to 240	630 to 735	Strip 6 min
		EH	210 to 260	705 to 805	-
		SH	230 to 270	765 to 865	-
	C7521	0	-	375 min	20 min
		1/2H	120 to 180	440 to 570	5 min
		H	150 to 210	540 to 640
		H	150 to 210	540 to 640	Strip 3 min
		EH	185 min	610 min	-
	C7541	0	-	355 min	20 min
		1/2H	110 to 170	410 to 540	5 min
		H	135 min	490 min	Strip 3 min

Titanium copper is a copper alloy having titanium as the main additive element. Advantages include high strength along with excellent stress relaxation resistance and bend formability. Its properties are similar to those of beryllium copper alloy, long a representative standard for high-functionality copper alloys. Some types of Titanium copper can be used as an alternative material to beryllium copper (mill-hardened material).

Characteristics: Cu + Ti Alloy
High strength with excellent bend formability
Excellent stress-relaxation and fatigue strength
Suitable for replacement of High-strength Beryllium Copper
Applications: Micro connectors, Micro switches, Springs,
Battery terminals, etc
Major Types: OLIN YCut-FX
- YCuT-FX-H (0.15t) LDV2
- YCuT-FX-H (0.15t) TDV2
- YCuT-FX-EH (0.20t) LD
- YCuT-FX-EH (0.20t) TD
- YCuT-FX-SH (0.12t) LD
- YCuT-FX-SH (0.12t) TD
- YCuT-FX-ESH (0.06t) LD
- YCuT-FX-ESH (0.06t) TD
Chemical Composition TiCu + Ti2.9-3.5 ≧99.5(wt.%)

Density at 20°C	g/cm³	8.68
Modulus of Elasticity	kN/mm²	LD 125 TD 135
Factor of Bending Deflection	kN/mm²	LD 105 TD 115
Poisson's Ratio	-	0.33
Elecrical Resistivity	μΩ･m	0.14
Thermal Conductivity at 20°C	W/(m･K)	50
Coefficient of Thermal Expansion at 20-300°C	×10-6/K	17.6
Melting Point Liquidus	°C	1075
Melting Point Solidus	°C	980
Magnetic Property		Non-magnetic
Specific Heat	J/(kg･K)	400

Temper	0.2%Yield	Tensile	Elongation	Hardness	Electrical	Remarks
Temper	Strength N/mm²	Strength* N/mm²	(Nominal)* %	Vickers* HV	Conductivity (Nominal)* %IACS	Thickness Range**
H	850-1000	920-1080	15	300-340	13	≦0.25mm
H	≧830	920-1080	15	300-340	13	0.25-0.30
EH	900-1050	970-1100	10	310-360	13	≦0.22mm
EH	≧880	970-1100	10	310-360	13	0.22-0.30
SH	950-1150	1010-1200	5	315-380	13	≦0.15mm
ESH	1000-1200	1050-1250	3	320-400	13	≦0.15mm

1) * For reference only
2) ** Latest available thickness range should be confirmed

Temper	90º W-Bend*		Remarks
Temper	G.W.(R/ｔ)	B.W.(R/t)	Thickness Range**
H	0	0.5	≦0.15mm
	0.5	1	0.15-0.25
	1	1.5	0.25-0.30
EH	0	1	≦0.12mm
	1	2	0.12-0.22
	1	2.5	0.22-0.30
SH	0	1	≦0.08mm
	1	2	0.08-0.10
	1	3	0.10-0.15
ESH	0.5	4	≦0.08mm
ESH	1	6	0.08-0.15

1) *JIS H3130
2) ** Latest available thickness range should be confirmed

Particular Copper Alloy is widely applied on different products and industry. Semi-conductors, leadframe, and IT industry are highly depending on copper alloy with different characteristics. Special Types: GMX96, GMX215, EFTEC-3, EFTEC-64, EFTEC-97, M702S,194 Alloy

High Performance Conductive Spring Material GMX96

NGK Copper-Nickel-Tin alloy "GMX96" is an age hardening type copper alloy, using spinodal decomposition. GMX96 has excellent characteristics such as high strength and heat resistance comparable to beryllium copper alloy, and electrical conductivity equivalent to phosphor bronze. GMX96 is widely used as contact springs in various applications like connectors, switches, etc.

High Performance Heat resistance Material GMX215

NGK Copper-Nickel-Tin alloy "GMX215" is an age hardening type copper alloy, using spinodal decomposition. GMX215 is a high performance heat resistant spring material with high strength comparable to beryllium copper alloy, and the highest level of superior features such as corrosion resistance and heat resistance among conventional copper alloys. GMX215 is a high-performance spring material suitable for parts used in severe condition such as automobiles and industrial equipment.

Name	Alloy No.	Chemical Composition %
Name	Alloy No.	Cu	Ni	Fe	Sn	Zn	Mn	Ni(2)	P
NGK GMX series	GMX96	Bal	8.5 ~ 9.5	0.5 max	5.5 ~ 6.5	-	0.5 max	-	-
NGK GMX series	GMX215	Bal	20.0 ~ 22.0	0.5 max	4.5 ~ 5.7	-	0.5 max	-	-

Name	Alloy No.	Temper Grade	Vickers Hardness (HV)	Tensile Strength (N/mm²)	Elongation (%)	Bending R/t (90W)		Heat Treatmet Condition
Name	Alloy No.	Temper Grade	Vickers Hardness (HV)	Tensile Strength (N/mm²)	Elongation (%)	0 degree Good way	90 degree Bad Way	Heat Treatmet Condition
GMX Series	GMX96	1/4 H	145 to 220	510 to 620	10 min	1.0	1.0	N/A
		1/4HT	270 min	885 min	2 min	-	-	375C x 2h
		1/2 H	180 to 240	590 to 695	4 min	2.0	2.0	N/A
		1/2 HT	285 min	930 min	2 min	-	-	375C x 2h
		H	210 to 270	685 to 835	-	3.0	3.0	N/A
		HT	300 min	980 min	-	-	-	375C x 2h
		HM	250 min	835 to 930	15 min	1.5	1.5	N/A
		EHM	280 min	930 to 1080	10 min	2.5	2.5	N/A
		XHM	320 min	1060 min	3 min	4.0	6.0	N/A
	GMX215	1/4 H	145 to 220	510 to 620	10 min	1.0	1.0	N/A
		1/4HT	270 min	885 min	2 min			450C x 2h
		1/2 H	180 to 240	590 to 695	4 min	2.0	2.0	N/A
		1/2 HT	285 min	930 min	2 min			450C x 2h
		H	210 to 270	685 to 835	2 min	3.0	3.0	N/A
		HT	300 min	980 min	-	-	-	450C x 2h
		SH	250 to 310	825 to 950	-	-	-	-
		SHT	330 min	1080 min	-	-	-	450C x 2h
		HM	250 min	835 to 930	3 min	3.0	5.0	N/A
		EHM	280 min	960 to 1110	3 min	-	-	N/A
		XHM	320 min	1060 min	3 min	-	-	N/A

High Tensile Strength and Electrical conductivity EFTEC series

Furukawa Electric EFTEC series have superior electroplating property and stress relaxation property, and can be used for various plating, just as Ni/Au, Ag, Sn, etc. EFTEC series also have high tensile strength and electrical conductivity that support superior bending workability, and to form complicated shapes with good conductivity.

特性 Properties	EFTEC-3	EFTEC-64T	EFTEC-97
熱膨張係数 Coefficient of Thermal Expansion （10-6/K）	17.3	17.0	17.7
熱伝導率 Thermal Conductivity （W/m・K）	340	301	170
体積抵抗率 Electrical Resistivity （µΩ・cm）	2	-	-
導電率 Electrical Conductivity （%IACS）	85	75	40
縦弾性係数 Modulus of Elasticity （GPa）	118	127	132
比重 Specific Gravity	8.9	8.9	8.8