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C70275 Copper Nickel Alloy MAX126 Wrought COPPER NICKELS Copper-Nickel Alloys true true https://api.copper.org/alloys.xhtml/C70275
Chemical Composition
Elements
Cu(1,2) Pb Sn Zn Fe Ni Ca Cr Mg Si
(1) Cu value includes Ag.
(2) Cu + Sum of Named Elements 99.5% min.
Min (%) 0.30 0.30 0.50 0.002 0.10
Max (%) Rem 0.01 1.0 1.0 0.25 1.5 0.01 0.06 0.20 0.50
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.2% Offset
(ksi)		 Elongation
(%)		 Vickers Hardness, 500 gm
* Measured at room temperature, 68°F (20°C).
Flat Products 1/2 Hard and Stress Relieved HR02 58 Min
73 Max
 54 Min
69 Max		 9 Min
 130 Min
150 Max
Cold-worked (drawn), Stress-relieved Tempers, HR HR 76 Min
91 Max
 73 Min
87 Max		 3 Min
 150 Min
180 Max
Hard and Stress Relieved HR04 69 Min
83 Max
 65 Min
80 Max		 7 Min
 140 Min
170 Max
Physical Properties
Melting Point - Liquidus°F 1985
Melting Point - Solidus°F 1920
Densitylb/cu in. at 68°F 0.323
Specific Gravity 8.94
Electrical Conductivity% IACS at 68°F 33
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 84.1
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 9.5
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 18900
Fabrication Properties
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Fair
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Fair
Spot Weld Good
Seam Weld Fair
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Good
Forgeability Rating 70
Machinability Rating 20
Common Fabrication Processes

No fabrication process properties for this alloy

Thermal Properties
Treatment Minimum* Maximum*
* Temperature is measured in Fahrenheit.
Annealing 660 1200
Hot Working Temperature 1557 1755
Typical Uses

No information for this alloy

Applicable Specifications

No applicable specifications for this alloy

Corrosion Properties

No Corrosion Properties Available.