Cupro CNB

Description

Hard copper alloy with high thermal conductivity and high mechanical properties combined with good hardness and high temperature strength.

Cupro CNB CuCONiBe Cobalt Nickel Copper Beryllium Copper Alloys.

Electrical	Industrial
Welding and Brazing Components	Plunger tips, die casting

COMMON FABRICATION PROCESSES

No fabrication process properties for this alloy.

CHEMICAL COMPOSITION

Elements
Cu^(1,2)	Fe	Ni	Be	Co	Si
(1) Cu value includes Ag. (2) Cu + Sum of Named Elements 99.5% min.
Min (%)			0.8	0.4	0.8
Max (%)	Rem	0.2	1.3	0.7	1.3	0.2

MECHANICAL PROPERTIES

Form	Temper	Temper Code	Tensile Strength (ksi)	Elongation (%)	Rockwell B scale
* Measured at room temperature, 68°F (20°C).
Forgings	Hard and Precipitation Heat Treated	TH04	100 Min 120 Typ 140 Max	10 Min 14 Max	95 Min
	Precipitation Hardened	TF00	100 Min 120 Typ 140 Max	10 Min 14 Max	95 Min
	Solution Heat Treated	TB00	100 Min 120 Typ 140 Max	10 Min 14 Max	95 Min
Sheet, Strip, Roller Bar & Plate	Hard and Precipitation Heat Treated	TH04	100 Min 140 Max	10 Min 14 Max	95 Min
	Precipitation Hardened	TF00	100 Min 120 Typ 140 Max	10 Min 14 Max	95 Min
	Solution Heat Treated	TB00	100 Min 120 Typ 140 Max	10 Min 14 Max	95 Min

PHYSICAL PROPERTIES

Melting Point – Liquidus°F	1975
Melting Point – Solidus°F	1880
Densitylb/cu in. at 68°F	0.318
Specific Gravity	8.81
Electrical Conductivity% IACS at 68°F	45
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F	135
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F)	9.8
Modulus of Elasticity in Tensionksi	19600
Magnetic Permeability	1
Poisson’s Ratio	0.3

FABRICATION PROPERTIES

Soldering	Good
Brazing	Good
Oxyacetylene Welding	Not Recommended
Gas Shielded Arc Welding	Fair
Coated Metal Arc Welding	Fair
Spot Weld	Good
Seam Weld	Good
Butt Weld	Good
Capacity for Being Cold Worked	Excellent
Capacity for Being Hot Formed	Good