Copper and Alloys - H. Cross Company

Copper & Alloys

H Cross Company supplies Copper ribbons and strips

H. Cross Company is one of the largest suppliers of Copper and Copper Alloy in all forms including wire, strip, ribbon, sheet and foil.

Type 25 Beryllium Copper Alloy

Type 101 Copper

H Cross Company supplies Copper 101 ribbons and strips

Type 101 – also known as Oxygen-Free Electronic (OFE). This is a 99.99% pure copper with 0.0005% oxygen content. It achieves a minimum 101% IACS conductivity rating. This copper is finished to a final form in a carefully regulated, oxygen-free environment. Silver (Ag) is considered an impurity in the OFE chemical specification.

Typical Mechanical Properties

	Annealed	As Rolled
Ultimate Tensile Strength	35,000 PSI	57,000 PSI
Yield Strength	10,000 PSI	53,000 PSI
Elongation	40%	2%
Modulus of Elasticity	17 x 10e6 PSI
Poisson’s Ratio	0.32

Typical Physical Properties

Density		0.323 lbs/cu in
Melting Point		1080° C
Electrical Resistivity		101% IACS @ RT
Temperature coefficient of Resistivity (0 to 100° C)		3900 PPM/°C
Electrical Conductivity @ RT		586 Megmho-cm
Thermal Conductivity @ RT		390 W/m*k
Thermal Expansion Coefficient		17 x 10e-6/ °C
(20 to 100 °C)

Applications

Used for electrical and electronic conductors, wave guides, cavity resonators, superconductor matrixes, vacuum tube and solid-state devices, and glass-to-metal seals.

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Type 25 Beryllium Copper Alloy

cu-25

Beryllium Copper #25 is a copper based alloy that can be strengthened by precipitate hardening. This alloy combines the best combinations of electrical conductivity, corrosion resistance and mechanical strength making it ideal for numerous electronic and electro-mechanical devices.

Typical Mechanical Properties

	Annealed	Annealed Precipitate hardened	As Rolled	As rolled Precipitate hardened
Ultimate Tensile Strength (PSI)	70,000	175,000	120,000	210,000
Yield Strength (PSI)	30,000	150,000	110,000	200,000
Elongation	35%	3%	2%	1%
Modulus of Elasticity	18.5 x 10e6
Poisson’s Ratio	0.285

** These values are general in nature and can be altered by control of different process variables. H. Cross can supply this material in a wide range of tempers and elongations.

Typical Physical Properties

Density		0.298 lbs/cu in
Melting Point		865° C
Electrical Resistivity @ RT		7.81 Micro Ohm-cm
Thermal Conductivity @ RT		105 W/m*k
Thermal Expansion Coefficient		17.5 x 10e-6/°C
(20 to 200 °C)		0.128 Megmho-cm (Hardened temper)

Forms

H. Cross Company can supply these products in all forms including wire, strip, ribbon, sheet and foil. We can also produce these materials in round, slit or square edges depending on your size requirements. See our standard dimensional sizes and tolerances for more information. If you do not see the size range you are interested in please Contact Us by email or phone us with your specific requirements.

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Cupro-Nickel Alloy 715

H Cross Company supplies Copper Nickel 715 ribbons and strips
Cupro-Nickel Alloy 715 is a copper nickel alloy with resistance to corrosion in salt water. It has good fatigue strength and thermal conductivity.

Typical Mechanical Properties

	Annealed	As Rolled
Ultimate Tensile Strength	65,000 PSI	100,000 PSI
Yield Strength	35,000 PSI	90,000 PSI
Elongation	30%	2%
Modulus of Elasticity	22 x 10e6 PSI

Typical Physical Properties

Density		0.322 lbs/cu in
Melting Point		1170° C
Electrical Resistivity @ RT		41.2 Microhm-cm
Thermal Conductivity @ RT		29.4 W/m*k
Thermal Expansion Coefficient		15.5 x 10e-6/°C
(20 to 95 °C)

Forms

H. Cross Company can supply this product in all forms including wire, strip, ribbon, sheet and foil. We can also produce these materials in round or slit edges depending on your size requirements. See our standard dimensional sizes and tolerances for more information. If you do not see the size range you are interested in please Contact Us by email or phone us with your specific requirements.

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