Cupronickel 90/10 (C70600) vs 70/30 (C71500): properties, ASTM standards, applications, and procurement guide. Certified cupro nickel supply
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Cupronickel 90/10 (C70600) vs 70/30 (C71500): properties, ASTM standards, applications, and procurement guide. Certified cupro nickel supply
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Why seawater engineers trust copper nickel over stainless steel
Seawater destroys most metals.
316L stainless steel pits in hot chloride environments. Carbon steel rusts without coating. Titanium works but costs 4× more.
That's why marine and offshore engineers have been specifying cupronickel for over 100 years.
✅ Resists seawater corrosion without coatings ✅ Naturally anti-biofouling — no barnacles, no biofilm ✅ Immune to stress corrosion cracking in chloride environments ✅ High thermal conductivity for heat exchangers and condensers
The two grades you need to know: C70600 (90/10) — the workhorse. Condensers, ship hulls, marine piping. C71500 (70/30) — the upgrade. Offshore risers, desalination brine, high-velocity service.
Full procurement guide — properties, ASTM standards, and grade selection: 👉 https://niftyalloys.com/blogs/cupronickel-c70600-c71500-guide
ASTM B111 C70600 Tube (UNS C70600), a 90/10 copper nickel tube offering excellent seawater corrosion resistance, thermal conductivity, and d
The ASTM B111 C70600 is a seamless copper-nickel (90/10) alloy tube engineered for superior performance in corrosive and heat-transfer environments. Produced under the ASTM B111 specification, this tube is widely used in critical industrial sectors where resistance to seawater corrosion, biofouling, and thermal stress is essential.
Made from UNS C70600 (90% copper, 10% nickel) alloy, the tube offers excellent corrosion resistance in seawater and brackish water, high thermal conductivity for efficient heat exchange, and strong mechanical properties such as ductility and formability. It is available in various outside diameters (6 mm to 168.3 mm), wall thicknesses (0.7 mm to 10 mm), and lengths up to 6 meters, suitable for tailored engineering applications.
ASTM B466 C70600 (UNS C70600) copper nickel pipes and tubes offer excellent seawater corrosion resistance for marine, condenser, and heat ex
Emirerri Steel offers premium ASTM B466 C70600 copper-nickel seamless pipes and tubes, also known as UNS C70600 (90/10 Cu-Ni), engineered for demanding marine and industrial environments. Manufactured to strict ASTM B466 standards, this copper-nickel alloy features approximately 90% copper and 10% nickel with small additions of iron and manganese, giving it exceptional corrosion resistance in seawater and brackish water, high mechanical strength, and long service life.
These seamless Cu-Ni tubes and pipes are ideal for marine piping systems, offshore platforms, heat exchangers, condensers, seawater cooling systems, and industrial fluid handling applications where resistance to corrosion, erosion, and biofouling is critical. The material also offers excellent fabrication characteristics, including good weldability and thermal stability.
C70600 COPPER ALLOY STEEL TUBE
Discover the specifications and features of C70600 Copper Alloy Steel Tube from Yuhong - the leading steel tubing manufacturer in China, and
C70600 pipe/tube using UNS C70600 copper-nickel alloy is primarily used in seawater service as forged and machined valve and pump components, fittings, and hardware. The alloy UNS C70600 pipe is also used in applications where high corrosion resistance is required, and where chloride stress corrosion cracking prevention measures prevent the use of stainless steel. Just like UNS C71500, copper alloy UNS C70600 tubes are seamless Copper Nickel Alloy Tubes of standard specifications for Water Desalting Plants.
UNS C70600 COPPER NICKEL PIPE/TUBE SPECIFICATION
Model NO.
C70600 C71500
Standard
ASTM
Od
6.35-406mm
Wt
0.5-80mm
Length
1-6m or as the Customer requires
Transport Package
Standard Export Packing
Specification
Pure Cu99.9%
Trademark
Tongmao
origin
China
HS Code
7411101900
SB111 C70600 TUBE PROPERTIES
Copper or Alloy
Copper
Tin
Aluminum
Nickel incl Cobalt
Lead
lron
Zinc
Manganese
Arsonic
Antimony
Phosphonus
Chromium
Elements
C10100
99.99 min@0
002 max
0.0010 max
0005 max
0.0010 max
0.0001 max
0.00005 max
0.0005 max
0.0004 max
0.0003 max
0.0001 max
C10200
99.95 min_
C10300
99.95 minE
0.001-0.005
C10800
99.95 minF
0.005-0.012
C12000
99.90 min
0.004-0.012
C12200
99.9 min
0.015-0.040
C14200
99.40 min
0.15-0.50
0.015-0.040
C19200
98.5 min
0.8-1.2
0.20 max
0.01-0.04
C23000
B4.0- 86.0
0.05
0.05 max
remainder
C28000
59.0- 63.0
0.09
0.07 max
remainder
C44300
70.0-73.0
0.9 -1.2
0.07
0.06 max
remainder
0.02-0.06
C44400
70.0-73.0
0.9 -1.2
0.07
0.06 max
remainder
0.02 -0.10
C44500
70.0-73.0
0.9 -1.2
0.07
0.06 max
remainder
0.02 -0.10
C60800
remainder
5.0-6.5
0.1
0.10 max
0.02-0.35
C61300
remainder
0.20 -0.50
6.0-7.5
0.15 max
0.01
2.0-3.0
0.10max
0.20 max
0.015 max
C61400
remainder
6.0-8.0
0.01
1.5-3.5
0.20 max
1.0 max
0.015 max
C68700
76.0-79.0
1.8-2.5
0.07
0.06 max
remainder
0.02-0.06
C70400
remainder
4.8-6.2
0.05
1.3-1.7
1.0max
0.30-0.8
C70600
remainder
9.0-11.0
0.05
1.0-1.8
1.0 max
1.0 max
C70620
86.5 min
9.0-11.0
0.02
1.0-1.8
0.50 max
1.0 max
0.02 max
C.05 max
C71000
remainder
19.0-23.0
0.05/
0.50-1.0
1.0 max"
1.0 max
C71500
remainder
29.0-33.0
0.05/
0.40-1.0
1.0 max
1.0 max
C71520
65.0 min
29.0-33.0
0.02
0.40-1.0
0.50 max
1.0 max
0.02 max
C .05 max
C71640
remainder
29.0-32.0
0.05*
1.7-2.3
1.0 max"
1.5-2.5
C.06 max
C72200
remainder
15.0-18.0
0.054
0.50-1.0
1.0 max"
1.0 max
0.30-
UNS ALLOY C70600 PIPE HIGHLIGHTS
The properties of copper-nickel tube alloy C70600 are usually supplied as redrawn tubes in the annealed condition. The combination of strength and good ductility provides excellent formability for ASTM B111 tubes.
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copper nickel cuni 90/10 c70600 weld neck flange manufacturer
Material :
Copper Nickel ASTM B466(151) UNS C70600
CuNi 90/10
BS 2871 CN102
7060X
Cunifer
Cupro Nickel
Contact Info
Contact Person: Mr.Kurt Yang Moblie:0086-13761034866 What'app:0086-13761034866 Tel:86-21-58050989 Skype:shihangkurt Website:www.shshihang.com