Copper Nickel 70/30 Pipes | Cu-Ni 70/30 ASTM B466 UNS C71500

Solitaire Overseas is a trusted copper nickel 70 30 pipes supplier, stockist and exporter based in Mumbai, India. We supply ASTM B466 / ASME SB466 UNS C71500 copper nickel 70/30 pipes in seamless, welded and ERW forms to clients across the Gulf, Southeast Asia, Europe, and beyond. Our stock is maintained mill-certified, with full traceability and third-party inspection available on request. We are an ISO-certified organisation committed to on-time delivery and competitive pricing for project quantities and spot requirements alike.

CuNi 70/30 (UNS C71500) pipes contain 70% copper and 30% nickel, with controlled additions of iron and manganese. This composition gives the alloy superior erosion-corrosion resistance at high seawater flow velocities, the primary reason naval architects and desalination plant engineers specify 70/30 over 90/10 for high-velocity lines. Our Cupro Nickel 70/30 Heat Exchanger Condenser Tubes are also available for brine heater and MSF/MED desalination applications. Request a quote or MTC along with your RFQ.

Browse our complete range of Cupro Nickel Pipes Supplier & Exporter products, including the Cupro Nickel 90/10 Pipes Supplier & Exporter for lower-velocity seawater applications. For complete piping systems, we also supply Copper Nickel 70/30 Pipe Fittings and Copper Nickel 70/30 Flanges.

Copper Nickel 70 30 Round Pipe

Copper Nickel 70_30 Round Tube

Copper Nickel 70_30 Seamless Tube

Copper Nickel 70_30 Welded Pipe

Copper Nickel 70_30 Welded Tube

Cu-Ni 70_30 Seamless Pipe

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Copper Nickel 70/30 Pipes Supplier & Exporter
Specification of Cu-Ni 70/30 Pipes
Types of Copper Nickel 70/30 Pipes & Tubes
Cu-Ni 70/30 Pipes Equivalent Grades (UNS C71500)
Cu-Ni 70/30 Pipes Chemical Composition
Cu-Ni 70/30 Pipes Mechanical & Physical Properties
Fabrication & Weldability of Cu-Ni 70/30 Pipes
70/30 CuNi Pipe Dimensions
Copper Nickel 70/30 Pipe Size Chart
Copper Nickel 70/30 Pipe Pressure Rating
Cu-Ni 70/30 Pipe Applications
Why Choose Solitaire Overseas for Cu-Ni 70/30 Pipes
What Affects Cu-Ni 70/30 Pipe Pricing
Testing of CuNi 70/30 Pipes
Packaging of CuNi 70/30 Pipes
Related Products
Frequently Asked Questions - Copper Nickel 70/30 Pipes

Specification of Cu-Ni 70/30 Pipes

Property	Details
Outside Diameter (OD)	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	Salt Water Piping, Propeller Sleeves, Evaporator Tubes, Pump Bodies

Types of Copper Nickel 70/30 Pipes & Tubes

We supply the full range of CuNi 70/30 pipe and tube forms. Click any product type below to view specifications and request a quote:

Types of CuNi 90/10 Seamless & Welded Pipe
Cu-Ni 70/30 Thin Wall Tube
ASTM B466 Copper Nickel 70/30 Seamless Pipe
Copper Nickel 70/30 Thin Wall Pipe
ASTM B466 Copper Nickel 70/30 Thick Wall Tube
ASTM B466 Copper Nickel 70/30 Round Pipe
UNS C71500 Cu-Ni 70/30 Round Tube
ASTM B466 Copper Nickel 70/30 Custom Pipe
UNS C71500 Copper Nickel 70/30 Welded Tube
Cupro Nickel 70/30 Welded Pipe Stockist
ASTM B466 Copper Nickel 70/30 Thin Wall Pipe
UNS C71500 Cu-Ni 70/30 Lined Pipe

UNS C71500 Copper Nickel 70/30 Clad Pipe
Cupro Nickel 70/30 Seamless Pipe
Copper Nickel 70/30 Round Pipe
Cu-Ni 70/30 Hollow Pipe
Copper Nickel 70/30 Bush Hex Pipe
Cu-Ni 70/30 Flex Pipe Supplier
Copper Nickel 70/30 Custom Tube
Copper Nickel 70/30 Custom Pipe
Cu-Ni 70/30 Thick Wall Tube
Copper Nickel 70/30 Thick Wall Pipe
Copper Nickel 70/30 Polished Tube
SCH40 Copper Nickel 70/30 Pipe

Cu-Ni 70/30 Pipes Equivalent Grades (UNS C71500)

Standard	UNS	Werkstoff Nr.
Cu-Ni 70/30	C71500	2.0882

Cu-Ni 70/30 Pipes Chemical Composition

Element	Cu-Ni 70/30
Cu	65.0 min
Mn	1.0 max
Pb	0.5 max
Ni	29–33 max
Fe	0.4–1.0
Zn	1 max

Cu-Ni 70/30 Pipes Mechanical & Physical Properties

Property	Cu-Ni 70/30
Density	0.323 lb/in³ at 68°F
Melting Point	2260°F
Tensile Strength	50,000 psi
Yield Strength (0.2% Offset)	20,000 psi (typ.)
Elongation	30%

Note: yield strength on the live page currently reads “90–1000 psi,” which is inconsistent with published UNS C71500 data (~20,000 psi) and with the 50,000 psi tensile figure on the same table. Flagging for a data check corrected here to a typical published value pending confirmation from your mill certs.

Fabrication & Weldability of Cu-Ni 70/30 Pipes

Cu-Ni 70/30 is a readily fabricated alloy across all standard joining methods, which matters for buyers planning field welding or shop fabrication:

Joining Technique	Suitability
Coated Metal Arc Welding	Excellent
Gas Shielded Arc Welding	Excellent
Oxyacetylene Welding	Good
Butt Weld / Seam Weld	Excellent
Brazing / Soldering	Excellent
Spot Weld	Excellent
Cold / Hot Forming	Good

Machinability rating: approximately 20 (relative to a 100 rating for free-cutting brass), reflecting the alloy's tendency to work-harden sharp tooling and moderate cutting speeds are recommended.

70/30 CuNi Pipe Dimensions

Size (in)	Wall Thickness (in)	Outside Diameter (in)	Approx Weight (lbs/ft)
1/4 OD	0.035	0.25	0.1
3/8 OD	0.049	0.38	0.2
1/4	0.072	0.54	0.43
3/8	0.095	0.68	0.19
1/2	0.120	0.84	1.1
3/4	0.148	1.05	1.71
1	0.180	1.32	2.61
1-1/4	0.220	1.66	2.18
1-1/2	0.25	1.9	5.25
2	0.340	2.38	8.85
2-1/2	0.38	2.88	12.1
3	0.46	3.5	18.7

Copper Nickel 70/30 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 70/30 Pipe Pressure Rating

Working pressure (psig) by pipe OD and wall thickness:

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 70/30 Pipe Applications

CuNi 70/30 pipes are widely specified in seawater and marine environments due to their high-velocity erosion-corrosion resistance. For a deeper look at end-use sectors, see our blog:What are Copper Nickel Pipes Used For.

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

Why Choose Solitaire Overseas for Cu-Ni 70/30 Pipes

ISO 9001:2015 certified: quality management is audited, not just claimed.
EN 10204 3.1 / 3.2 Mill Test Certificates: on every shipment, with third-party inspection by SGS, Bureau Veritas, or TÜV available on request.
Mill-certified, traceable stock: held in Mumbai for fast dispatch on standard sizes.
Direct export experience: across the Gulf, Southeast Asia, and Europe — not a first-time exporter learning customs paperwork on your order.
Full piping system, one supplier: pipes, fittings, flanges, and heat exchanger tubes in the same 70/30 grade, so specs match across the system.

What Affects Cu-Ni 70/30 Pipe Pricing

Copper Nickel 70/30 pipe pricing moves with the LME copper/nickel base metal price, so there's no fixed rate card but the factors that move your specific quote are predictable:

Origin mill: European, Japanese, and US mill material typically commands a premium over Indian-origin material of the same spec.
Size and schedule: larger OD and heavier wall (higher schedule) means more material per foot, which scales cost roughly with weight.
Form: seamless generally costs more than welded/ERW pipe of the same size due to the manufacturing process.
Certification level: 3.1 MTC is standard; 3.2 (third-party witnessed) inspection adds cost and lead time.
Order quantity: stock-length cut-to-size orders price differently than mill-run project quantities.

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

Testing of CuNi 70/30 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 70/30 Pipes

We understand the importance of CuNi 70/30 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 70/30 Pipes

What is the UNS number and ASTM standard for Copper Nickel 70/30 pipes?

UNS C71500. Covered under ASTM B466 (seamless) and B467 (welded), with ASME equivalents SB466 and SB467. Werkstoff Nr. 2.0882. Also referred to as Cupro Nickel 70/30 or CuNi 70/30.

Why is CuNi 70/30 preferred over 90/10 for high-velocity seawater systems?

The higher nickel content (30% vs 10%) gives UNS C71500 superior erosion-corrosion resistance at elevated flow velocities, the key reason naval, desalination, and brine heater engineers specify 70/30.

Do you supply mill test certificates (MTC) and third-party inspection?

Yes. All CuNi 70/30 ASTM B466 pipes ship with EN 10204 3.1 MTC. Third-party inspection by SGS, Bureau Veritas, or TÜV is available on request. NABL-approved lab reports are also provided.

What pipe sizes and schedules are available for ASTM B466 CuNi 70/30?

OD: 1/2" to 6". Wall: 0.15 mm to 1.50 mm. Schedules: SCH20 to XXS. Seamless, welded, and ERW forms stocked. Custom sizes, lengths, and finishes supplied against project requirements.

Is Cu-Ni 70/30 pipe weldable on site?

Yes, Cu-Ni 70/30 rates “excellent” for coated metal arc, gas shielded arc, butt, seam, and spot welding, and “good” for oxyacetylene welding. It does work-harden, so machining and forming should use sharp tooling and moderate speeds, see the Fabrication & Weldability table above for the full breakdown.

What determines the price of Copper Nickel 70/30 pipe?

Base LME copper/nickel prices set the floor, and your final quote moves with origin mill, size and schedule, seamless vs. welded form, certification level (3.1 vs. 3.2 MTC), and order quantity. See “What Affects Cu-Ni 70/30 Pipe Pricing” above for a full breakdown.