C70600 Copper Nickel Pipe is a popular copper-nickel alloy tube, known for its excellent performance in seawater and various corrosive environments. It is often called 90/10 copper-nickel alloy because its nominal composition contains about 90% copper and 10% nickel. It is widely used in many fields, including oil and gas pipelines, water treatment equipment, chemical industry, and nuclear power industry. Its excellent physical properties and corrosion resistance make it the first choice for high-performance materials.

ZIZI has a rich inventory of copper nickel C70600, including bars, plates, tubes, fittings and flanges. C70600 copper nickel pipe is known for its moderate strength, weldability and formability. Due to the addition of appropriate amounts of iron and manganese, the 90/10 alloy has excellent resistance to general corrosion and stress cracking, as well as excellent performance under erosion and impact in high-speed turbulent water containing bubbles and silt. Please call us or request a quote and we will be happy to help you. Contact us

90/10 Copper Nickel Pipe Main Features

Excellent seawater corrosion resistance:

This is the most prominent advantage of C70600. It can form a stable protective film in seawater, effectively resist pitting, crevice corrosion and galvanic corrosion, and maintain good corrosion resistance even in salty, oxygen-containing or velocity-changing seawater.

High erosion corrosion resistance:

Copper nickel alloy can withstand higher flow rates than other copper alloys, and the protective film it forms can also maintain toughness in high-speed water flow, effectively resisting erosion corrosion (or erosion-corrosion).

Good biofouling resistance:

Copper ions have a certain bactericidal effect, making it difficult for marine organisms to attach to the surface of C70600, reducing biofouling and maintaining heat exchange efficiency.

Medium strength:

 It has good medium strength, enough to meet the needs of most pipeline and heat exchange applications.

Excellent weldability

The alloy has good welding performance and is suitable for various welding methods, including gas welding, arc welding, laser welding, etc., ensuring that welding operations can be easily carried out during manufacturing and maintenance.

Excellent thermal stability

C70600 copper nickel pipe maintains its physical and mechanical properties in high temperature environments and is suitable for working under high temperature conditions, such as in steam and heat exchange equipment.

ASTM B466 UNS C70600 Pipes (90/10 ) Specification

Specifications	Details
Specifications	ASTM SB 466
Size	1/2″ TO 6′ IN OD & NB IN Various SWG & SCH
Outer Diameter	4.00 to 22.00 mm
Wall Thickness	Between 0.15mm and 1.50 mm
Length	Single Random, Double Random & Required Length
Schedule	SCH20, SCH30, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS
Form	Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes
End	Plain End, Beveled End, Threaded
Grades	Copper Nickel 90/10 (C70600), Cupro Nickel 70/30 (C71500), UNS C71640

Standards for C70600 Copper Nickel Tubes

The production and use of C70600 copper nickel tubes typically adhere to the following international standards:

ASTM B111/B111M: This standard specifies seamless copper and copper alloy condenser and heat exchanger tubes.

ASTM B466/B466M: This standard covers seamless copper-nickel pipe and tube.

EN 12451: This European standard pertains to copper and copper alloy tubes for heat exchangers.

EEMUA 144: This is a British Engineering Equipment and Materials Users’ Association standard, specifically for copper-nickel tubes in offshore and marine applications.

MIL-T-16420K: This is a United States military standard for copper-nickel tubes.

Chemical Composition ASTM B466 90/10 Pipes and Tubes

Copper Alloy UNS Nos	Copper incl Silver	Nickel incl   Cobalt	Lead max	Iron	Zinc,max	Manganese
C70600	remainder	9.0 to 11.0	0.05	1.0 to 1.8	1	1.0 max

Mechanical Properties ASTM B466 90/10 Pipes and Tubes

Standard Temper	Former Temper	Copper Alloy UNS Nos.	Tensile Strength, min,ksi(MPa)	Yield Strength,A min, ksi(MPa)	RockwellB Hardness 30T
060	Soft annealC	C70600	38(260)	13(90)	45 max

Copper Nickel 90/10 Pipe Dimension

It is recommended that wherever possible, product purchased to this specification be ordered to the diameters and wall thickness indicated in Table X1.1.

Preferred Wall Thicknesses for Drawn Seamless Pipe Based on SPS Diameter

SPS	Outside Diameter,in.[mm]	Specials in.[mm]	Specials in.[mm]	Specials in.[mm]	Specials in.[mm]	Specials in.[mm]	Regular in.[mm]	Extra Strong in.[mm]
1/8	0.405[10.3]	0.058 [1.47]	–	–	–	–	0.062[1.57]	0.100 [254]
1/4	0.540[13.7	0.065[1.65]	0.072[1.83]	–	–	–	0.082 [2.08]	0.123 [3.12]
3/8	0.675[17.1]	0.065[1.65]	0.072[1.83]	0.095[2.41]	0.148[3.76]	–	0.090 [2.29]	0.127 [3.23]
1/2	0.840 [21.3]	0.065 [1.65]	0.072[1.83]	0.120 [3.03]	0.203 [5.16]	–	0.107 [2.72]	0.149[3.78]
3/4	1.050 [26.7]	0.065 [1.65]	0.083[2.11]	0.148 [3.76]	0.238 [6.05]	–	0.114 [2.90]	0.157 [3.99]
1	1.315 [33.4]	0.065 [1.65]	0.095[241]	0.203[5.16]	0.340[8.64]	–	0.126 [3.20]	0.182 [4.62]
1 1/4	1.650 [42.4]	0.072[1.83]	0.095[241]	0.120 [3.03]	0.220 [5.59]	0.380 [9.65]	0.146 [3.71]	0.194[4.93]
1 1/2	1.900[48.3]	0.072[1.83]	0.109 [277]	0.134 [3.40]	0.250 [6.35]	0.425[10.8]	0.150 [3.81]	0.203 [5.16]
2	2.375 [60.3]	0.083|2.11]	0.120 [3.03]	0.165 [4.19]	0.340[8.64]	0.520[13.2]	0.156 [3.96]	0.221 [5.61]
2 1/2	2.875 [73.0]	0.083 |2.11]	0.134 [3.40]	0203 [5.16]	0.380 [9.65]	–	0.187 [4.75]	0.280 [7.11]
3	3.500[88.9]	0.095[2.41]	0.165[4.19]	0.250[6.35]	0458 [11.6]	–	0.219[5.56]	0.304[7.72]
3 1/2	4.000 [102]	0.095[2.41]	0.180[4.57]	0284[7.21]	–	–	0.250 [6.35]	0.321 [8.15]
4	4.500[114]	0.109[2.77]	0203 [5.16]	0.340 [8.64]	–	–	0.250 [6.35]	0.341 [8.66]
5	5.552[141]	0.125[3.18]	0.220[5.59]	0.425 [10.8]	–	–	0.250 [6.35]	0.375 [9.52]
6	6.625[168]	0.134[3.40]	0.259[6.58]	0.457 [11.6]	–	–	0.250 [6.35]	0.437 [11.1]

What is C70600 Copper Nickel Pipe used for?

Offshore and shipbuilding industry

Seawater cooling systems

Fire protection systems

Ballast water lines

Evaporators and condensers

Electricity generation

Condensers and heat exchanger tubes in power plants

Oil and gas industry

Chemical and petrochemical industry

Desalination of seawater

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

C70600 Copper Nickel Pipe Exported Countries 

We Export C70600 Copper Nickel Pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan,  Europe, Africa, Asia, North America, South America, Middle East.etc

Frequently Asked Questions (FAQs)

1. What is C70600 material?

C70600 is a 90/10 copper-nickel alloy (approximately 90% Cu, 10% Ni, with a small amount of Fe and Mn). It is known for its excellent seawater corrosion resistance, excellent anti-biofouling performance, good mechanical strength and welding processability. It is widely used in marine heat exchangers, ship cooling pipelines, seawater desalination and seawater circulation systems of oil and gas platforms.

2. What is the difference between nickel, copper, and copper-nickel?

Nickel is a silvery-white, hard, ferromagnetic metal known for its high strength, toughness and resistance to high‐temperature oxidation, while copper is a soft, reddish metal prized for its excellent electrical and thermal conductivity; copper-nickel (Cu-Ni) alloys combine the two—typically 10–30% Ni in Cu—offering a balance of good conductivity with greatly enhanced strength, toughness and especially corrosion resistance (notably in seawater), making them ideal for marine and heat‐exchanger applications.

3. What are the disadvantages of copper nickel?

Copper-nickel is much more expensive than ordinary copper or steel, has lower thermal and electrical conductivity than pure copper, is susceptible to stress corrosion cracking in ammonia-rich or sulfide environments, has limited strength and hardness compared to steel (requiring thicker sections), and may corrode galvanically when combined with more noble metals, all of which can limit their use in high-stress, high-temperature, or chemically aggressive environments.