Nickel Copper | Cupro Nickel Alloy

Nickel Copper

Nickel copper alloys or cupro nickel is a part of the electronic grade alloy family. The earliest discovery of nickel copper was around 235 BC in Bactria. The original chemical breakdown was 75% copper and 25% nickel. Nickel copper is composed of elements such as iron and magnesium. Nickel has a significant effect on the physical properties of the pairing. The color becomes lighter when nickel is added and the purity increases as well. Cupro nickel is often used in the marine industry due to its high electric resistance ability and corrosion while in sea water. Nickel copper falls into the moderate to poor machining ability category due to its durability. This bond forms long, hard chips that cause irreparable surface damage when machined down.   

This alloy has been used in auto components, tools for marine exploration and in power plants; additionally, it is applied in coinage. Another application of nickel copper is in the electrical engineering space where it can be used in the production of heating cables, anodes for TV tubes and electric resistors. This alloy can be easily worked while experiencing cold and hot temperatures. Nickel copper is among the corrosion resistant copper alloys, protecting against moisture, acids, alkalis and salt solutions, organic acids and gases such as oxygen, chlorine and carbon dioxide. The probability that Nickel copper will ever face corrosion is small due to the stable protective coating.  

National Electronic Alloys has Nickel Copper on hand for your needs.  Request a quote today for pricing inquiries. 

CUPRO-NICKEL ALLOY 706
NOMINAL DATA SHEET
 
TYPICAL NOMINAL CHEMISTRY
10 % Cu/Ni
88.6% Cu
10 % Ni
1.4 % Fe

ASME SPEC NO.: SB171 & 402
SAE ALLOY NO.:
MILITARY SPEC.:MIL-C-15726
ASTM ALLOY NO.:B122
FEDERAL SPECS.:
DENSITY(lbs. per cu. in at 68 F (Annealed) (x 27.68 = gms/cu cm at 20 C):.323
MOD. OF ELAST.(x 10****** PSI, tension): 18
ELECT. COND.(% IACS at 68 F (20 C) as annealed): 9
THERM. COND.
(BTU per sq.ft.per ft.per hr.per F at 68 F,(20 C): 26
COEFF.OF TH.EXPN.(Inches/inch/ F x 10(-******) from 68 F to 572 F (20 C to 300 C): 9.5

 

TENSILE STRENGTH
YIELD STRENGTH
(0.2% offset)
(x 1000 PSI (MPA = KSI x 6.8948)
annealed: 43 - 50
25 max
1/2 hard: 58 - 72
55 - 71
full hard: 71 - 83
69 - 81
spring: 78 - 88
76 min,

ELONGATION % IN 2 inches (=% in 50mm)
annealed: 33 - 37
1/2 hard: 2 - 9
full hard: 1 - 2
spring: 1 max

ROCKWELL B HARDNESS
(.20 gauge and over (Rockwell F or 30 T where noted)
annealed: - 66 - 84(F)
1/2 hard: 66 - 81
full hard: 76 - 86
spring: 83 - 91

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CUPRO-NICKEL ALLOY 715
NOMINAL DATA SHEET
 
PTYPICAL NOMINAL CHEMISTRY
30% Cu/Ni
69.4% Cu
30 % Ni
0.6 % Fe

ASME SPEC NO.: SB171 & 402
SAE ALLOY NO.: MILITARY SPEC.:MIL-C-15726
MILITARY SPEC.:MIL-C-15726
ASTM ALLOY NO.:B122
FEDERAL SPECS.:
DENSITY(lbs. per cu. in at 68 F (Annealed) (x 27.68 = gms/cu cm at 20 C):.323
MOD. OF ELAST.(x 10****** PSI, tension):22
ELECT. COND.(% IACS at 68 F (20 C) as annealed):4.6
THERM. COND.
COEFF.OF TH.EXPN.(Inches/inch/ F x 10(-******) from 68 F to 572 F (20 C to 300 C):9.0

 

TENSILE STRENGTH
YIELD STRENGTH
(0.2% offset)
(x 1000 PSI (MPA = KSI x 6.8948)
annealed: 52 min.
-
1/2 hard: 66 - 80
60 - 78
full hard: 75-88
73 - 84
spring: 84 - 94
81 - 90

ELONGATION % IN 2 inches (=% in 50mm)
annealed: 30 min.
1/2 hard: 3 - 10
full hard: 2 - 4
spring: 1 - 2

ROCKWELL B HARDNESS
(.20 gauge and over (Rockwell F or 30 T where noted)
annealed: - 76 - 85
1/2 hard: 76 - 85
full hard: 83 - 89
spring: 87 - 91


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COPPER / NICKEL / TIN ALLOY 725
NOMINAL DATA SHEET
 
TYPICAL NOMINAL CHEMISTRY
88.2% Cu
9.5% Ni
2.3% SN

ASME SPEC NO.:
SAE ALLOY NO.:
MILITARY SPEC.:
ASTM ALLOY NO.:B122
FEDERAL SPECS.:
DENSITY(lbs. per cu. in at 68 F (Annealed) (x 27.68 = gms/cu cm at 20 C):.321
MOD. OF ELAST.(x 10****** PSI, tension):20
ELECT. COND.(% IACS at 68 F (20 C) as annealed):11
THERM. COND.
(BTU per sq.ft.per ft.per hr.per F at 68 F,(20 C):31
COEFF.OF TH.EXPN.(Inches/inch/ F x 10(-******) from 68 F to 572 F (20 C to 300 C):9.2

 

TENSILE STRENGTH
YIELD STRENGTH
(0.2% offset)
(x 1000 PSI (MPA = KSI x 6.8948)
annealed: 45 - 65
18 - 25
1/2 hard: 65 - 80
59 - 78
full hard: 75 - 90
73 - 88
spring: 85 - 100
83 - 97

ELONGATION % IN 2 inches (=% in 50mm)
annealed: 34 - 36
1/2 hard: 3 - 17
full hard: 1 - 5
spring: 1 - 2

ROCKWELL B HARDNESS
(.20 gauge and over (Rockwell F or 30 T where noted)
annealed: - 50 max (30t)
1/2 hard: 70 - 90
full hard: 75 - 90
spring: 85 - 95

 

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