products details

Home > Products >

Heat Exchanger Tube

ASTM B111 UNS C71500 Copper Nickel Tube CuNi30Mn1Fe Tube CuNi 70/30 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 UNS C71500 Copper Nickel Tube CuNi30Mn1Fe Tube CuNi 70/30 Heat Exchanger Tube

Brand Name:	YUHONG
Model Number:	ASTM B111 UNS C71500 Copper Nickel Seamless 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

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 C71500 , CuNi 70/30

OD:

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

WT:

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

Length:

Single Random, Double Random & Cut Length

Tube End:

Plain End, Beveled End

Process:

Cold Drawn

Application:

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

Highlight:

ASTM B111 UNS C71500 Copper Nickel Tube, Heat Exchanger Tubee

Product Description

ASTM B111 CuNi30Mn1Fe / UNS C71500 Copper Nickel Seamless Tube CuNi 70/30 Heat Exchanger Tube

ASTM B111/ASME SB111 specifies seamless copper-alloy condenser and heat-exchanger tubes. Grade UNS C71500 (CuNi 70/30, EN CuNi30Mn1Fe) is a copper-based alloy with ~30% nickel, plus controlled iron and manganese. Supplied annealed, it has 483 MPa tensile strength and exceptional ductility. Its defining advantage is outstanding resistance to seawater impingement corrosion, stress-corrosion cracking, and biofouling—far superior to stainless steels in chloride environments. Thermal conductivity is ~15 times higher than steel, enabling superior heat transfer. However, it is limited to moderate temperatures (≤400°C). Extensively used in marine condensers, offshore coolers, and desalination plants.
UNS C71500 (CuNi 70/30) is specifically engineered for aggressive, high-risk aqueous environments—primarily involving seawater, brackish water, and contaminated brine—where standard copper alloys or stainless steels fail prematurely.

Equivalent Grades of ASTM B111 UNS C71500 Copper Nickel Tube CuNi 70/30 Heat Exchanger Tube

Material Designation	GB/T8890	ASTM B111	BS2871	JIS H3300	DIN1785
Copper-Nickel	BFe30-1-1	C71500	CN107	C7150	CuNi30Mn1Fe

Chemical Composition of ASTM B111 UNS C71500 Copper Nickel Tube CuNi 70/30 Heat Exchanger Tube

Designation	Chemical Composition %
Designation	Cu	Sn	Al	As	Ni	Fe	Mn	Pb max.	Zn
C71500	Rem	–	–	–	29.0-33.0	0.4-1.0	1.0max	0.05	1.0max

Tensile Requirements of ASTM B111 UNS C71500 Copper Nickel Tube CuNi 70/30 Heat Exchanger Tube

Copper or Copper Alloy UNS NO.	Temper Designation		Tensile Strength	Yield Strength
Copper or Copper Alloy UNS NO.	Standard	Former	min ksi	min ksi
C71500	O61	annealed	52	18

Here is the breakdown of the exact environmental conditions that mandate the use of C71500:
1. High-Velocity Seawater (Erosion-Corrosion Environments)

Condition: Seawater flow velocity exceeding 3.0 m/s (up to 4.5 m/s).
Why: At these speeds, the protective oxide film on C70600 (90/10) or aluminum brass gets mechanically stripped away (impingement attack). C71500 has superior film stability and hardness to withstand turbulent zones, such as inlet ends or U-bend areas of heat exchangers.

2. High-Temperature Marine Environments

Condition: Seawater or cooling water operating continuously above 45°C–50°C, peaking at 90°C to 120°C.
Why: Lower copper alloys suffer from accelerated de-alloying and pitting at elevated temperatures. C71500 maintains its corrosion resistance in hot tropical waters (e.g., Middle East/Persian Gulf seawater intake) and high-temperature engine jacket-water coolers.

3. Polluted or Chemically Aggressive Waters

Condition: Water contaminated with Hydrogen Sulfide (H₂S), Ammonia (NH₃), or industrial wastewater/effluents.
Why: Brass and 90/10 CuNi are highly susceptible to Stress Corrosion Cracking (SCC) and sulfide-induced corrosion in polluted harbors or industrial outfalls. C71500's high nickel content provides immunity to ammonia attack.

4. Sand-Laden or Silty Waters (Erosive Media)

Condition: Coastal or estuarine waters carrying suspended sand, silt, or mud particles (common near river deltas or shallow offshore platforms).
Why: The higher mechanical strength and thicker, iron-enriched protective layer of C71500 resist the "sandblasting" effect that would quickly erode softer copper alloys.

5. Stagnant or Low-Flow Seawater (Microbiological/Fouling Risk)

Condition: Systems with frequent shutdowns, tidal variations, or intermittent operation where water stagnates.
Why: While biofouling occurs on all materials, C71500's copper-ion release inhibits macro-fouling (mussels/barnacles). More importantly, it resists pitting and crevice corrosion under deposits during stagnant periods—a common failure mode for aluminum brass.

Application

Superior Seawater Corrosion Resistance: Forms a tight, protective surface oxide film. Highly resistant to impingement attack, stress corrosion cracking (SCC), and macro-fouling (biomarine growth attaches poorly compared to other metals).
Key Applications:
- Seawater Cooled Condensers & Heat Exchangers (power plants, ships, offshore platforms).
- Desalination Plant (Multi-Stage Flash & Multi-Effect Distillation) evaporator and heat rejection tubes.
- Shipboard Piping for fire mains, bilge, and ballast systems.
- Marine Engineering and coastal infrastructure.

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