Copper Nickel (CuNi)

Copper Nickel (UNS C70600 - UNS C7060X - UNS C71500 - C71640)

CuNi 90/10 & CuNi 70/30 Plate/Sheet
CuNi 90/10 & CuNi 70/30 Seamless & Welded Tube
CuNi 90/10 & CuNi 70/30 Seamless & Welded Pipe
CuNi 90/10 & CuNi 70/30 Round Bar
CuNi 90/10 & CuNi 70/30 Flanges
CuNi 90/10 & CuNi 70/30 Seamless & Welded BW Fittings

General Copper Nickel information
Cu-Ni alloys are alloys of copper (base metal with the largest individual content) and nickel with or without other elements, whereby the zinc content may not be more than 1%. When other elements are present, nickel has the largest individual content after copper, compared with each other element. As with other copper alloys, it is necessary to distinguish between wrought
alloys, which are processed to semi-finished products, and cast alloys, from which castings are produced by various casting processes. The Cu-Ni alloys with additions of manganese are important in electrical engineering. Additions of iron significantly improve the resistance of Cu-Ni alloys to erosion corrosion in flowing seawater and other aggressive waters.

Copper Nickel Applications
Desalination
Seawater Piping Systems

Copper Nickel Corrosion Resistance
Copper alloys have very good resistance to seawater, brine water, organic compounds, salts, diluted non-oxidizing acids, and more. CuNi 90/10 (C70600 & C7060X) is a Copper Nickel Iron alloy with a small content of manganese which allows excellent resistance to sea- and brakish water. Of all commercial coper alloys, CuNi 70/30 (C71500) offers the best resistance to aqueous corrosion. It is resistant to acid solutions and highly resistant to stress corrosion cracking, and impingement corrosion. In addition, CuNi70/30 offers a greater strength for higher pressures.

Copper Nickel Heat Resistance
The hot strength of copper increases with only a small addition of nickel. By adding iron, mechanical properties are improved, not only at room temperature, but also at elevated temperatures. 10% Ni. CuNi10Fe1Mn, for example, can be used in pressure vessel construction up to 300°C, CuNi30Mn1Fe up to 350°C. Above these limit temperatures, strength drops markedly, particularly the creep strength and creep strain limit.

Copper Nickel Heat Treatment
In general, heat treatments are only used with Cu-Ni alloys for soft annealing and stress relieving Temperatures for recrystallisation annealing can vary over wide limits between about 620 and 900°C, depending on degree of cold work, nickel content and additional constituents. High temperatures are associated with short annealing times (continuous annealing) and low temperatures with long annealing times (static annealing). Stress-relief annealing is carried out at 280 to 500°C. It is advisable to anneal excluding air or in a slightly reducing atmosphere, to avoid the pickling that is required with air-containing annealing atmospheres.

Guide to selection of tube materials
Sea Water
Dissolved salts from 1500 to 3000 ppm
Suspended solids more than 25 ppm
H2S or Ammonia less than 1 ppm
Permissible average velocity of water 3.0–4.0 meter / sec.

Product Applications areas
Chillers
Heat Exchangers & Condensers
Power Plants
Refineries
Desalination Plants
Ship Building & Ship Repairs
Defense

Chemical Composition & Mechanical Properties

Trade Name UNS Copper Nickel Industry Spec. Chemical Composition Min. Tensile (KSI) Min. Yield (KSI) Elong.
%
CuNi 90/10 UNS C70600
UNS C70620
ASME SB111, SB171, SB359, SB466, SB467, SB543
ASTM B111, B122, B151, B171, B359, B395, B432, B466, B467, B543, B608
DIN 2.0872
MIL C-15726, T-15005,
T-16420, T-22214
SAE J461, J463

Cu 88.6 min
PB 0.05 max*
Fe 1.8 max
Zn 1 max*
Ni 9-11 max
Mn 1.0 max

38 15 30
CuNi 90/10 UNC C7060X EEMUA 144 90/10, 145 90/10, 14 90/10 Cu rem.
Pb 0.01 max
Fe 1.5 - 2.0
Zn 0.2 max
P 0.2 max
S 0.2 max
Ni 10 - 11
Mn 0.5 - 1.0
40 15 30
CuNi 70/30 UNS C71500
UNS C71520
ASME SB111, SB171, SB359, SB466, SB467, SB543
ASTM B111, B122, B151, B171, B359, B395, B432, B466, B467, B543, B608
DIN 2.0872
MIL C-15726, T-15005,
T-16420, T-22214
SAE J461, J463
Cu rem (65.0 min)
PB 0.05 max*
Fe 0.4 - 1.0
Zn 1 max*
Ni 29 - 33
Mn 1.0 max
52 18 45
CuNi 70/30 UNS C71640 ASTM B111, B543, B552 Cu rem
PB 0.05 max*
Fe 1.7 - 2.3
Zn 1 max*
Ni 29 - 32
Mn 1.5 - 2.5
63 25 -

 

Copper Nickel Pipes - European Standards

Main Std NFA GAM BS EEMUA NES DIN EN ASTM
Seamless Pipes
CuNi10 Fe1 Mn
51102 MM 11 2871 CN 102 144 UNS 7060X 779 part 3 86019 2.1972 17664/17996 2.0872 12449 CW352 H B466 C70600
Seamwelded Pipes CuNi10 Fe1 Mn 2875 CN 102 144 UNS 7060X 86018 2.1972 17664/17996 2.0872 B467 C70600
Bars
CuNi10 Fe1 Mn
MM 11 MM 13 2872 CN 102
2874 CN 102
779 part 2 17664 2.0872 17672 2.0872.10 B151 C70600
B249
Plates
CuNi10 Fe1 Mn
2870 CN 102
2875 CN 102
B171 C70600
B402
Seamless Pipes
CuNi30 Fe1 Mn
51102 MM 11 2871 CN 107 780 part 3 17664 2.0882
17671/1755
12449 CW352 H B466 C71500
Seamwelded Pipes CuNi30 Fe1 Mn 2875 CN 107 17664 2.0882
17670 2.0882/86018
B467 C71500
Bars
CuNi30 Fe1 Mn
2872 CN 107
2874 CN 107
17664 2.0872 17672 2.0872.10 B151 C71500
B249
Plates
CuNi30 Fe1 Mn
2875 CN 107 B171 C71500
B402

 

CuNi 90/10 Reducers CuNi 90/10 Concentric Reducers CuNi 90/10 Tees
CuNi 90/10 Pipe Nipples CuNi 90/10 Stub end CuNi 90/10 Tees
CuNi 90/10 Elbows CuNi 90/10 3D Elbow CuNi 90/10 Stub Ends
CuNi 90/10 End Caps CuNi 90/10 5D Elbow CuNi 90/10 180° SR Return Bends
CuNi 90/10 Long Radius Elbow CuNi 90/10 Eccentric Reducers CuNi 90/10 Reducing Crosses
CuNi 90/10 Elbows CuNi 90/10 Crosses CuNi 90/10 Couplings
CuNi 90/10 Short Radius Elbow CuNi 90/10 Pipe Bends CuNi 90/10 45° Elbows
CuNi 90/10 Reducing Elbow CuNi 90/10 Piggable Bends CuNi 90/10 180° LR Return Bends
CuNi 90/10 Forged Caps CuNi 90/10 Forged Tees CuNi 90/10 Unions
CuNi 90/10 Couplings CuNi 90/10 Forged Reducers CuNi 90/10  Forged Crosses
CuNi 90/10  90° Forged Elbows CuNi 90/10 Inserts CuNi 90/10 Forged Plug
CuNi 90/10 45° Forged Elbows CuNi 90/10 Street Elbows CuNi 90/10 Bushings
CuNi 90/10 Forged Fittings CuNi 90/10 Fittings CuNi 90/10 Socket weld Fitting
CuNi 90/10 Forged Fittings CuNi 90/10 Fittings CuNi 90/10 Threaded Fitting
CuNi 90/10 Forged Fittings CuNi 90/10 Forged Pipe Fittings CuNi 90/10 Forged Pipe Fittings
CuNi 90/10 Blind Flanges CuNi 90/10 Plate Flanges CuNi 90/10 ASME Flanges
CuNi 90/10 Reducing Flanges CuNi 90/10 Weld Neck Flanges CuNi 90/10 Industrial Flanges
CuNi 90/10 Threaded Flanges CuNi 90/10 Lap Joint Flanges CuNi 90/10 Long weld Neck Flanges
CuNi 90/10 Slip-On Flanges CuNi 90/10 Socket Weld Flanges CuNi 90/10 Orifice Flanges
CuNi 90/10 Flat Flanges CuNi 90/10 DIN Flanges CuNi 90/10 ANSI Flanges
CuNi 90/10 Pipe Flanges CuNi 90/10 Flanges CuNi 90/10 Forged Flanges

 

UNS C71640 Reducers UNS C71640 Concentric Reducers UNS C71640 Tees
UNS C71640 Pipe Nipples UNS C71640 Stub end UNS C71640 Tees
UNS C71640 Elbows UNS C71640 3D Elbow UNS C71640 Stub Ends
UNS C71640 End Caps UNS C71640 5D Elbow UNS C71640 180° SR Return Bends
UNS C71640 Long Radius Elbow UNS C71640 Eccentric Reducers UNS C71640 Reducing Crosses
UNS C71640 Elbows UNS C71640 Crosses UNS C71640 Couplings
UNS C71640 Short Radius Elbow UNS C71640 Pipe Bends UNS C71640 45° Elbows
UNS C71640 Reducing Elbow UNS C71640 Piggable Bends UNS C71640 180° LR Return Bends
UNS C71640 Forged Caps UNS C71640 Forged Tees UNS C71640 Unions
UNS C71640 Couplings UNS C71640 Forged Reducers UNS C71640  Forged Crosses
UNS C71640  90° Forged Elbows UNS C71640 Inserts UNS C71640 Forged Plug
UNS C71640 45° Forged Elbows UNS C71640 Street Elbows UNS C71640 Bushings
UNS C71640 Forged Fittings UNS C71640 Fittings UNS C71640 Socket weld Fitting
UNS C71640 Forged Fittings UNS C71640 Fittings UNS C71640 Threaded Fitting
UNS C71640 Forged Fittings UNS C71640 Forged Pipe Fittings UNS C71640 Forged Pipe Fittings
UNS C71640 Blind Flanges UNS C71640 Plate Flanges UNS C71640 ASME Flanges
UNS C71640 Reducing Flanges UNS C71640 Weld Neck Flanges UNS C71640 Industrial Flanges
UNS C71640 Threaded Flanges UNS C71640 Lap Joint Flanges UNS C71640 Long weld Neck Flanges
UNS C71640 Slip-On Flanges UNS C71640 Socket Weld Flanges UNS C71640 Orifice Flanges
UNS C71640 Flat Flanges UNS C71640 DIN Flanges UNS C71640 ANSI Flanges
UNS C71640 Pipe Flanges UNS C71640 Flanges UNS C71640 Forged Flanges

 

UNS C7060X Reducers UNS C7060X Concentric Reducers UNS C7060X Tees
UNS C7060X Pipe Nipples UNS C7060X Stub end UNS C7060X Tees
UNS C7060X Elbows UNS C7060X 3D Elbow UNS C7060X Stub Ends
UNS C7060X End Caps UNS C7060X 5D Elbow UNS C7060X 180° SR Return Bends
UNS C7060X Long Radius Elbow UNS C7060X Eccentric Reducers UNS C7060X Reducing Crosses
UNS C7060X Elbows UNS C7060X Crosses UNS C7060X Couplings
UNS C7060X Short Radius Elbow UNS C7060X Pipe Bends UNS C7060X 45° Elbows
UNS C7060X Reducing Elbow UNS C7060X Piggable Bends UNS C7060X 180° LR Return Bends
UNS C7060X Forged Caps UNS C7060X Forged Tees UNS C7060X Unions
UNS C7060X Couplings UNS C7060X Forged Reducers UNS C7060X  Forged Crosses
UNS C7060X  90° Forged Elbows UNS C7060X Inserts UNS C7060X Forged Plug
UNS C7060X 45° Forged Elbows UNS C7060X Street Elbows UNS C7060X Bushings
UNS C7060X Forged Fittings UNS C7060X Fittings UNS C7060X Socket weld Fitting
UNS C7060X Forged Fittings UNS C7060X Fittings UNS C7060X Threaded Fitting
UNS C7060X Forged Fittings UNS C7060X Forged Pipe Fittings UNS C7060X Forged Pipe Fittings
UNS C7060X Blind Flanges UNS C7060X Plate Flanges UNS C7060X ASME Flanges
UNS C7060X Reducing Flanges UNS C7060X Weld Neck Flanges UNS C7060X Industrial Flanges
UNS C7060X Threaded Flanges UNS C7060X Lap Joint Flanges UNS C7060X Long weld Neck Flanges
UNS C7060X Slip-On Flanges UNS C7060X Socket Weld Flanges UNS C7060X Orifice Flanges
UNS C7060X Flat Flanges UNS C7060X DIN Flanges UNS C7060X ANSI Flanges
UNS C7060X Pipe Flanges UNS C7060X Flanges UNS C7060X Forged Flanges

 

Uns c70600 Reducers Uns c70600 Concentric Reducers Uns c70600 Tees
Uns c70600 Pipe Nipples Uns c70600 Stub end Uns c70600 Tees
Uns c70600 Elbows Uns c70600 3D Elbow Uns c70600 Stub Ends
Uns c70600 End Caps Uns c70600 5D Elbow Uns c70600 180° SR Return Bends
Uns c70600 Long Radius Elbow Uns c70600 Eccentric Reducers Uns c70600 Reducing Crosses
Uns c70600 Elbows Uns c70600 Crosses Uns c70600 Couplings
Uns c70600 Short Radius Elbow Uns c70600 Pipe Bends Uns c70600 45° Elbows
Uns c70600 Reducing Elbow Uns c70600 Piggable Bends Uns c70600 180° LR Return Bends
Uns c70600 Forged Caps Uns c70600 Forged Tees Uns c70600 Unions
Uns c70600 Couplings Uns c70600 Forged Reducers Uns c70600  Forged Crosses
Uns c70600  90° Forged Elbows Uns c70600 Inserts Uns c70600 Forged Plug
Uns c70600 45° Forged Elbows Uns c70600 Street Elbows Uns c70600 Bushings
Uns c70600 Forged Fittings Uns c70600 Fittings Uns c70600 Socket weld Fitting
Uns c70600 Forged Fittings Uns c70600 Fittings Uns c70600 Threaded Fitting
Uns c70600 Forged Fittings Uns c70600 Forged Pipe Fittings Uns c70600 Forged Pipe Fittings
Uns c70600 Blind Flanges Uns c70600 Plate Flanges Uns c70600 ASME Flanges
Uns c70600 Reducing Flanges Uns c70600 Weld Neck Flanges Uns c70600 Industrial Flanges
Uns c70600 Threaded Flanges Uns c70600 Lap Joint Flanges Uns c70600 Long weld Neck Flanges
Uns c70600 Slip-On Flanges Uns c70600 Socket Weld Flanges Uns c70600 Orifice Flanges
Uns c70600 Flat Flanges Uns c70600 DIN Flanges Uns c70600 ANSI Flanges
Uns c70600 Pipe Flanges Uns c70600 Flanges Uns c70600 Forged Flanges

 

CuNi 70/30 Reducers CuNi 70/30 Concentric Reducers CuNi 70/30 Tees
CuNi 70/30 Pipe Nipples CuNi 70/30 Stub end CuNi 70/30 Tees
CuNi 70/30 Elbows CuNi 70/30 3D Elbow CuNi 70/30 Stub Ends
CuNi 70/30 End Caps CuNi 70/30 5D Elbow CuNi 70/30 180° SR Return Bends
CuNi 70/30 Long Radius Elbow CuNi 70/30 Eccentric Reducers CuNi 70/30 Reducing Crosses
CuNi 70/30 Elbows CuNi 70/30 Crosses CuNi 70/30 Couplings
CuNi 70/30 Short Radius Elbow CuNi 70/30 Pipe Bends CuNi 70/30 45° Elbows
CuNi 70/30 Reducing Elbow CuNi 70/30 Piggable Bends CuNi 70/30 180° LR Return Bends
CuNi 70/30 Forged Caps CuNi 70/30 Forged Tees CuNi 70/30 Unions
CuNi 70/30 Couplings CuNi 70/30 Forged Reducers CuNi 70/30  Forged Crosses
CuNi 70/30  90° Forged Elbows CuNi 70/30 Inserts CuNi 70/30 Forged Plug
CuNi 70/30 45° Forged Elbows CuNi 70/30 Street Elbows CuNi 70/30 Bushings
CuNi 70/30 Forged Fittings CuNi 70/30 Fittings CuNi 70/30 Socket weld Fitting
CuNi 70/30 Forged Fittings CuNi 70/30 Fittings CuNi 70/30 Threaded Fitting
CuNi 70/30 Forged Fittings CuNi 70/30 Forged Pipe Fittings CuNi 70/30 Forged Pipe Fittings
CuNi 70/30 Blind Flanges CuNi 70/30 Plate Flanges CuNi 70/30 ASME Flanges
CuNi 70/30 Reducing Flanges CuNi 70/30 Weld Neck Flanges CuNi 70/30 Industrial Flanges
CuNi 70/30 Threaded Flanges CuNi 70/30 Lap Joint Flanges CuNi 70/30 Long weld Neck Flanges
CuNi 70/30 Slip-On Flanges CuNi 70/30 Socket Weld Flanges CuNi 70/30 Orifice Flanges
CuNi 70/30 Flat Flanges CuNi 70/30 DIN Flanges CuNi 70/30 ANSI Flanges
CuNi 70/30 Pipe Flanges CuNi 70/30 Flanges CuNi 70/30 Forged Flanges

 

UNS C71500 Reducers UNS C71500 Concentric Reducers UNS C71500 Tees
UNS C71500 Pipe Nipples UNS C71500 Stub end UNS C71500 Tees
UNS C71500 Elbows UNS C71500 3D Elbow UNS C71500 Stub Ends
UNS C71500 End Caps UNS C71500 5D Elbow UNS C71500 180° SR Return Bends
UNS C71500 Long Radius Elbow UNS C71500 Eccentric Reducers UNS C71500 Reducing Crosses
UNS C71500 Elbows UNS C71500 Crosses UNS C71500 Couplings
UNS C71500 Short Radius Elbow UNS C71500 Pipe Bends UNS C71500 45° Elbows
UNS C71500 Reducing Elbow UNS C71500 Piggable Bends UNS C71500 180° LR Return Bends
UNS C71500 Forged Caps UNS C71500 Forged Tees UNS C71500 Unions
UNS C71500 Couplings UNS C71500 Forged Reducers UNS C71500  Forged Crosses
UNS C71500  90° Forged Elbows UNS C71500 Inserts UNS C71500 Forged Plug
UNS C71500 45° Forged Elbows UNS C71500 Street Elbows UNS C71500 Bushings
UNS C71500 Forged Fittings UNS C71500 Fittings UNS C71500 Socket weld Fitting
UNS C71500 Forged Fittings UNS C71500 Fittings UNS C71500 Threaded Fitting
UNS C71500 Forged Fittings UNS C71500 Forged Pipe Fittings UNS C71500 Forged Pipe Fittings
UNS C71500 Blind Flanges UNS C71500 Plate Flanges UNS C71500 ASME Flanges
UNS C71500 Reducing Flanges UNS C71500 Weld Neck Flanges UNS C71500 Industrial Flanges
UNS C71500 Threaded Flanges UNS C71500 Lap Joint Flanges UNS C71500 Long weld Neck Flanges
UNS C71500 Slip-On Flanges UNS C71500 Socket Weld Flanges UNS C71500 Orifice Flanges
UNS C71500 Flat Flanges UNS C71500 DIN Flanges UNS C71500 ANSI Flanges
UNS C71500 Pipe Flanges UNS C71500 Flanges UNS C71500 Forged Flanges

 

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