Copper Nickel 90/10 Pipes (C70600) | ASTM B466 Cu-Ni 90/10

Solitaire Overseas is a trusted Cupro Nickel Pipes Supplier & Exporter. Our Cu-Ni 90/10 Pipe is a 90% copper, 10% nickel alloy that also contains small but significant additions of iron and manganese to improve overall strength and corrosion resistance. These Cupro Nickel 90 10 EFW Pipes are alloys that have reasonable power and thermal stability at high temperature levels. In clean natural salt water or in seawater chlorinated to levels sufficient to control biological metabolism, CuNi 90/10 is resistant to localized attack.

Due to its biofouling resistance, there are a limited number of possible sites for pitting attack, still in slow moving water; however, in polluted water containing hydrogen sulfide, pitting regularly takes place in the form of wide and low pits. The undercut type of pitting normally associated with stainless steel is not common for CuNi 90/10. For a comparison of grades, see our page on Cupro Nickel 70/30 Pipes Supplier & Exporter or read our blog on Copper Nickel Tubes & Pipes — Grades, Uses and Benefits.

Also known as Kunifer 10, Alloy 706, and CN102 across different regional standards all describe the same ASTM B466 UNS C70600 alloy.

Copper Nickel 90 10 Seamless Pipes

Copper Nickel 90 10 Seamless Tube

Copper Nickel 90 10 Welded Pipes

Copper Nickel 90 10 Welded Tube

Cu-Ni 90 10 Round Pipe

Cu-Ni 90 10 Round Tube

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Copper Nickel 90/10 Pipes Supplier
Specification of Cu-Ni 90/10 Pipes
Types of Copper Nickel 90/10 Seamless & Welded Pipe
Cu-Ni 90/10 Pipes Equivalent Grades
Cu-Ni 90/10 Pipes Chemical Composition
Cu-Ni 90/10 Pipes Mechanical & Physical Properties
Mechanical Properties by Temper
90/10 Copper Nickel Tube Tolerance
Copper Nickel 90/10 Pipe Standard Comparison Chart
CuNi 90/10 vs 70/30 — Which Grade Should You Specify?
Copper Nickel 90/10 Pipe Size Chart
Copper Nickel 90/10 Pipe Pressure Rating
Cu-Ni 90/10 Pipe Application
Documentation We Provide With Every Shipment
Testing of CuNi 90/10 Pipes
Packaging of CuNi 90/10 Pipes
Related Products
Frequently Asked Questions - Copper Nickel 90/10 Pipes

Specification of Cu-Ni 90/10 Pipes

Property	Details
Outside Diameter	1/2" to 6"
Thickness	0.15 mm to 1.50 mm
Length	Single Random, Double Random & Required Length
Schedule	SCH20, SCH30, SCH40, STD, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type	Welded / ERW / Seamless / Fabricated
Manufacturing Method	Cold Rolled / Hot Rolled
Standards	ASTM B466, B467, B111, B552, B543, B395 / ASME SB466, SB467, SB111, SB552, SB543, SB395
ASME / ASTM Equivalent	ASME SB466
Forms	Square, Round, Hydraulic, Rectangular, Coil, U Shape, Pancake Coil
Finish	Cold Finish, Bright Annealed, Annealing, Pickling, Polished
Testing	Chemical Testing, PMI Testing, Mechanical Testing, Visual Inspection, NABL Approved Lab Reports
End Type	Plain End, Beveled End, Threaded
Applications / Uses	Heat Exchangers, Brake Lines, Distiller Tubes, Condensers, Evaporator Tubes

Types of Copper Nickel 90/10 Seamless & Welded Pipe

Cu-Ni 90/10 Thin Wall Tube
ASTM B466 Copper Nickel 90/10 Seamless Pipe
Copper Nickel 90/10 Thin Wall Tube
ASTM B466 Copper Nickel 90/10 Thick Wall Pipe
ASTM B466 Copper Nickel 90/10 Round Pipe
UNS C70600 Cu-Ni 90/10 Round Tube
ASTM B466 Copper Nickel 90/10 Custom Pipe
UNS C70600 Copper Nickel 90/10 Welded Tube
Cupro Nickel 90/10 Welded Pipe Stockist
ASTM B466 Copper Nickel 90/10 Thin Wall Pipe
UNS C70600 Cu-Ni 90/10 Lined Pipe
UNS C70600 Copper Nickel 90/10 Clad Tube

Cupro Nickel 90/10 Seamless Pipe
Copper Nickel 90/10 Round Pipe Price
Cu-Ni 90/10 Hollow Pipe Price
Copper Nickel 90/10 Bush Hex Pipe
Cu-Ni 90/10 Flex Pipe Supplier
Copper Nickel 90/10 Round Pipe
Copper Nickel 90/10 Custom Tube
Copper Nickel 90/10 Custom Pipe
Cu-Ni 90/10 Thick Wall Tube
Copper Nickel 90/10 Thick Wall Pipe
Copper Nickel 90/10 Polished Pipe
SCH40 Copper Nickel 90/10 Tube

Cu-Ni 90/10 Pipes Equivalent Grades

Standard	UNS	Werkstoff Nr.
Cu-Ni 90/10	C70600	2.0872

Also designated EEMUA 234 (formerly EEMUA 144) under the UK offshore standard, and GB BFe10-1-1 under the Chinese standard — relevant if you’re quoting North Sea or China-spec projects.

Cu-Ni 90/10 Pipes Chemical Composition

Element	Cu-Ni 90/10
Cu	88.6 min
Mn	1.0 max
Pb	0.05 max
Ni	9–11
Fe	1.8 max
Zn	1 max

Cu-Ni 90/10 Pipes Mechanical & Physical Properties

Property	Cu-Ni 90/10
Density	0.323 lb/in³ at 68°F
Melting Point	2260°F
Tensile Strength	50,000 psi (345 MPa)
Yield Strength (0.2% Offset)	15,000 psi (103 MPa)
Elongation	30%

Mechanical Properties by Temper

The figures above are typical annealed values. If your spec calls out a temper, use this breakdown instead:

Property	O60 Annealed (min)	H80 Hard Drawn (min)
Tensile Strength	40,000 psi (276 MPa)	55,000 psi (380 MPa)
Yield Strength (0.2% Offset)	15,000 psi (105 MPa)	45,000 psi (310 MPa)
Elongation	30% min	Lower — confirm against your spec

Confirm required temper with your PO — hard-drawn is typically specified where added strength offsets a small reduction in ductility.

90/10 Copper Nickel Tube Tolerance

Diameter	Tolerance
Over 2 to 3 in (50.8–76.2 mm)	0.005 in (0.13 mm)
Over 3 to 4 in (76.2–102 mm)	0.006 in (0.15 mm)
Over 4 to 5 in (102–127 mm)	0.008 in (0.20 mm)
Over 5 to 6 in (127–152 mm)	0.009 in (0.23 mm)
Over 6 to 8 in (152–203 mm)	0.010 in (0.25 mm)
Over 8 to 10 in (203–254 mm)	0.013 in (0.33 mm)
Over 10 to 12 in (254–305 mm)	0.015 in (0.38 mm)
Over 12 in (305 mm)	0.5%

Copper Nickel 90/10 Pipe Standard Comparison Chart

Element	ASTM B466 C70600	JIS H3300 C7060	BS 2871 CN102	DIN 86019 2.1972	MIL-T-16420K C70600	EEMUA 234 UNS 7060X
Fe%	1.0–1.8	1.0–1.8	1.0–2.0	1.5–1.8	1.0–1.8	1.5–2.0
Ni%	9.0–11.0	9.0–11.0	10.0–11.0	9.0–11.0	9.0–11.0	10.0–11.0
Cu%	Balance	Min. 99.5 (Cu+Ni+Fe+Mn)	Balance	Balance	Min. 86.5	Balance
Mn%	Max 1.0	0.2–1.0	0.5–1.0	0.5–1.0	Max 1.0	0.5–1.0
Pb%	Max 0.02	Max 0.05	Max 0.01	Max 0.03	Max 0.02	Max 0.01

(Additional trace-element rows for C, P, S, Zn and Zr carried over unchanged from the live page.)

CuNi 90/10 vs 70/30 — Which Grade Should You Specify?

Both grades resist seawater corrosion well; the choice comes down to flow velocity, service life, and budget:

Factor	CuNi 90/10 (C70600)	CuNi 70/30 (C71500)
Seawater corrosion resistance	Excellent	Outstanding
High-velocity erosion resistance	Good — suits moderate flow	Excellent — suits high-velocity lines
Relative ex-works cost	Lower (less nickel content)	Higher
Typical duty	General seawater cooling, condensers, heat exchangers	Seawater injection, high-velocity offshore & naval lines

As a rule of thumb: specify 90/10 for standard seawater cooling and condenser duty, and step up to 70/30 where flow velocity, design life, or your project spec (e.g. NORSOK, offshore injection lines) demands the extra erosion margin.

Copper Nickel 90/10 Pipe Size Chart

Wall	Sizes ( O.D.)
.010	1/16", 1/8", 3/16"
.020	1/16", 1/8", 3/16", 1/4", 5/16", 3/8"
.012	1/8"
.016	1/8", 3/16"
.028	1/8", 3/16", 1/4", 5/16", 3/8", 1/2", 3/4", 1", 1 1/2", 2"
.035	1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 16", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
.049	3/16", 1/4", 5/16", 3/8", 1/2", 16", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
.065	1/4", 5/16", 3/8", 1/2", 16", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 3/4", 2", 2 1/2", 3"
.083	1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 7/8", 2", 2 1/2" ,3"
.095	1/2", 5/8", 1", 1 1/4", 1 1/2", 2"
.109	1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
.120	1/2", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 2", 2 1/4", 2 1/2", 3"
.125	3/4", 1", 1 1/4", 1 1/2", 2", 3", 3 1/4"
.134	1"
.250	3"
.375	3 1/2"

Copper Nickel 90/10 Pipe Pressure Rating

Working pressure (psig) by pipe OD and wall thickness — pipe and tube ratings are identical for this grade:

Pipe O.D. in.	.028	.030	.035	.049	.065	.083	.095	.109	.120	0.134
Working Pressure (psig)
1/8	2700	3000	3600
3/16	1800	1900	2300	3400
1/4	1300	1400	1600	2700	3500
5/16				1300	2200	2700
3/8				1000	1600	2200
1/2				800	1100	1600	2100
5/8					900	1200	1600	1900
3/4					700	1000	1300	1500	1800
7/8					600	800	1100	1300	1500
1					500	700	900	1100	1300	1500
1 1/8						600	800	1000	1100	1300

Cu-Ni 90/10 Pipe Application

CuNi 90/10 Pipes are used across various application industries. For complete form coverage in copper-nickel, also see our Cupro Nickel 90/10 Tubes Supplier & Exporter and Copper Nickel Products pages.

Food Processing Industry
Fabrication Industry
Oil and Gas Industry
Chemical Industry
Plumbing
General Purpose Applications
Heating
Water Supply Systems
Power Plant
Paper & Pulp Industry

Share your size, schedule, temper, and quantity and we'll come back with a firm quote — Request a Quote.

Documentation We Provide With Every Shipment

Export buyers typically need more than a packing slip. Here's what ships with your Cu-Ni 90/10 order on request:

Mill Test Certificate (EN 10204 3.1, or 3.2 with third-party witness)
Chemical and mechanical test reports
PMI (Positive Material Identification) test report
NABL-approved lab test reports
Certificate of origin
Packing list and commercial invoice

Testing of CuNi 90/10 Pipes

Mechanical Testing such as Tensile of Area, Hardness Test, Chemical Analysis – Spectro Analysis, Positive Material Identification tests are conducted. Other tests include Micro and Macro Test, Intergranular Corrosion (IGC) Test, Flattening Test, Flaring Test, and Pitting Resistance Test.

Packaging of CuNi 90/10 Pipes

We understand the importance of CuNi 90/10 Pipes packaging, especially during international shipments where the delivery has to pass through a number of channels to arrive at the final destination. We take proper care of packing. Usually pipes are packed in wooden cases/pallets and wrapped in environmental poly bags.

Frequently Asked Questions - Copper Nickel 90/10 Pipes

What is the UNS number for Copper Nickel 90/10 pipe?

The UNS number is C70600. The grade is covered by ASTM B466 / ASME SB466 and is also known as CuNi 90/10 or cupro nickel 90/10. Werkstoff Nr. is 2.0872.

Why is copper nickel pipe preferred for seawater systems?

Copper nickel forms a thin, adherent, protective film in seawater that resists further corrosion, and the alloy has inherent biofouling resistance marine organisms struggle to attach to the surface. Combined with good weldability and stable mechanical properties at both elevated and cryogenic temperatures, this makes it the standard choice for seawater cooling lines, condensers, and marine piping where carbon or stainless steel would corrode or foul.

When should I choose CuNi 90/10 over 70/30 copper nickel pipe?

Choose 90/10 for standard seawater cooling, condensers, and heat exchangers at moderate flow velocities; it costs less than 70/30 for equivalent service life in these conditions. Step up to 70/30 where flow velocity is high (seawater injection lines, naval propulsion piping) or your project spec calls for the extra erosion-corrosion margin. See the comparison table above for a side-by-side.

What sizes and schedules are available for ASTM B466 CuNi 90/10 pipe?

Outside diameter ½" to 6", wall thickness 0.15 mm to 1.50 mm, in Schedules SCH20 through XXS. Seamless, welded, and ERW forms are stocked, with custom sizes, lengths, and finishes available against project requirements.

What is the price of Copper Nickel 90/10 pipe?

There's no fixed rate price that tracks the LME copper/nickel base metal price and moves with origin mill, temper (annealed vs. hard drawn), seamless vs. welded form, certification level, and order quantity. See “What Affects Copper Nickel 90/10 Pipe Pricing” above, or share your size, schedule and quantity for a firm quote.

Is Copper Nickel 90/10 pipe the same as Kunifer 10 or C70600?

Yes. Kunifer 10, Alloy 706, CN102, and UNS C70600 all refer to the same 90% copper / 10% nickel alloy covered by ASTM B466 / ASME SB466; the naming just varies by which regional standard or trade body you're referencing.