products details

Home > Products >

Heat Exchanger Tube

ASTM B111 C70600 Copper Nickel Seamless Tube CuNi 90/10 U Bend Heat Exchanger Tube

All Category

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Nickel Alloy Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Tubesheet

Ms. Vivi Zhao

vivi@steelseamlesspipe.com

+8613023766106

Contact Now

ASTM B111 C70600 Copper Nickel Seamless Tube CuNi 90/10 U Bend Heat Exchanger Tube

Brand Name:	YUHONG
Model Number:	ASTM B111 UNS C70600 Copper Nickel U Bend Tube
MOQ:	500kgs
Price:	NEGOTIABLE
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Payment Terms:	L/C,T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

CHINA

Certification:

ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Production Name:

Heat Exchanger Tube

Standard:

ASTM B111, ASME SB111

Material:

UNS C70600 , CuNi 90/10

OD:

1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", Etc.

WT:

BWG 25, 22, 20, 18 ... 10

Radius:

Can Custom

Tube End:

Plain End, Beveled End

Process:

Cold Drawn

Application:

Boiler, Heat Exchanger, Oil And Gas Plant, Cooling, Condenser

Highlight:

ASTM B111 C70600 Copper Nickel Seamless Tube, CuNi 90/10 U Bend Heat Exchanger Tube

Product Description

ASTM B111 UNS C70600 / CuNi 90/10 Temper O61 Copper Nickel Seamless Tube U Bend Heat Exchanger Tube

ASTM B111 C70600 (CuNi 90/10) U bend tubes are seamless and specifically designed for marine heat exchangers and condensers. Composed of 90% copper and 10% nickel with iron, they offer excellent corrosion resistance, especially against seawater and biofouling. The U-bend configuration accommodates thermal expansion in shell-and-tube systems. However, they are sensitive to high-velocity turbulence at the bend (impingement attack) and must not be used in polluted water containing sulfides, which cause rapid pitting.

Cu-Ni 90/10 vs. The Competition

vs. Carbon Steel (SA179): SA179 is cheaper and stronger, but it rusts instantly in seawater. Cu-Ni is chosen where corrosion resistance is mandatory.
vs. Stainless Steel (316L): Stainless steel can suffer from "Crevice Corrosion" in stagnant seawater (under barnacles or gaskets). Cu-Ni handles stagnant conditions (with proper velocities) better. Also, Cu-Ni has superior biofouling resistance.
vs. Titanium: Titanium is virtually immune to seawater corrosion but is extremely expensive and has poorer heat transfer than copper alloys. Cu-Ni is the "mid-range" option: better corrosion resistance than steel, lower cost than titanium.

Chemical Composition of Copper Alloys

Designation	Chemical Composition %
Designation	Cu	Sn	Al	As	Ni	Fe	Mn	Pb max.	Zn
C44300	70.0-73.0	0.9-1.2	–	0.02-0.06	–	0.06 max	–	0.07	Rem
C68700	76.0-79.0	–	1.8-2.5	0.02-0.06	–	0.06 max	–	0.07	Rem
C70400	Rem	–	–	–	4.8-6.2	1.3-1.7	0.3-0.8	0.05	1.0max
C70600	Rem	–	–	–	9.0-11.0	1.0-1.8	1.0max	0.05	1.0max
C71500	Rem	–	–	–	29.0-33.0	0.4-1.0	1.0max	0.05	1.0max
C71640	Rem	–	–	–	29.0-32.0	1.7-2.3	1.5-2.5	0.05	1.0max

Tensile Requirements:

Copper or Copper Alloy UNS NO.	Temper Designation		Tensile Strength	Yield Strength
Copper or Copper Alloy UNS NO.	Standard	Former	min ksi	min ksi
C44300	O61	annealed	45	15
C68700	O61	annealed	50	18
C70400	H55	light-drawn	38	30
C70600	H55	light-drawn	45	15
C71500	O61	annealed	52	18
C71640	O61	annealed	63	25

Application

1. Seawater Heat Exchangers
2. Offshore Oil & Gas Platforms
3. Power Plant Auxiliary Coolers
4. Firewater Systems (Trim Coolers)
5. Hydraulic Oil Coolers

Ratings & Review

Overall Rating

3.7

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

33%

4 stars

3 stars

67%

2 stars

1 stars

All Reviews

Khan

Pakistan Dec 10.2025

Helpful (2)

the SS409 pins resist sulfur corrosion better than carbon steel pins we used earlier. In furnace service, that means longer runs between maintenance.

Ivan Volkov

Russian Federation Nov 11.2025

Helpful (3)

As an engineer in Siberia, I tested these fin tubes in extreme cold (-30°C). The ASTM A213 T11 steel performed well with no thermal cracks, and cooling efficiency met expectations (88%). That said, the Russian-language documentation had translation errors in technical terms, causing minor confusion during installation.

J*o

Spain Oct 17.2025

Helpful (3)

Really good quality, the ASME SA249 standard is the real deal. I was worried about the fins getting crushed during the long trip, but the packaging was top-notch—not a single one was bent.

Tags:

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube