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Heat Exchanger Tube

ASTM B111 UNS C68700 Aluminum Brass Tube CuZn20Al2 Copper Alloy Heat Exchanger Tube

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ASTM B111 UNS C68700 Aluminum Brass Tube CuZn20Al2 Copper Alloy Heat Exchanger Tube

Brand Name:	YUHONG
Model Number:	ASTM B111 UNS C68700 Aluminum Brass 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 C68700 / CuZn20Al2 / 2.0460

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

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 C68700 Aluminum Brass Tube, CuZn20Al2 Heat Exchanger Tube

Product Description

ASTM B111 UNS C68700 / CuZn20Al2 Aluminum Brass Tube Seamless Copper Alloy Tubing

ASTM B111 UNS C68700/ CuZn20Al2 Aluminum Brass Tube is not a generic "seawater brass" but a delicately balanced, arsenic‑stabilised, single‑phase alloy whose performance hinges on strict control of residual stress, ammonia exposure, and thermal cycling – and its selection is often a compromise between erosion resistance and fabricability/thermal efficiency, rather than an outright upgrade over UNS C44300.

C44300 (Admiralty) vs. C68700 (Aluminum Brass) – Differences:

Composition: C44300 = Cu-Zn-Sn-As (Tin-based); C68700 = Cu-Zn-Al-As (Aluminum-based).
Strength: C68700 is ~20-30% stronger (higher tensile/yield strength).
Corrosion: C68700 has far superior resistance to erosion, impingement attack (high-velocity seawater), and stress corrosion cracking. C44300 is good for general seawater but softer.
Fabrication: C44300 has better cold workability – easier for bending, flaring, and tight-radius forming.

Equivalent Grades of ASTM B111 Brass Tube Copper Alloy Heat Exchanger Tube

Material Designation	Corresponding Material Symbol
Material Designation	GB/T8890	ASTM B111	BS2871	JIS H3300	DIN1785
Aluminums Brass	HAL77-2	UNS C68700	CZ110	C6870T	CuZn20Al2
Admiralty Brass	HSn70-1	UNS C44300	CZ111	C4430T	CuZn28Sn1

Chemical Composition of ASTM B111 UNS C68700 Aluminum Brass Tube CuZn20Al2 Copper Alloy Heat Exchanger Tube

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

Tensile Requirements of ASTM B111 UNS C68700 Aluminum Brass Tube CuZn20Al2 Copper Alloy 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
C44300	O61	annealed	45	15
C68700	O61	annealed	50	18

How to Choose the correct brass alloy material?

Choose C68700 if: High water flow rates (>2 m/s), turbulent seawater, elevated temperatures, or power plant/heat exchanger tubes.
Choose C44300 if: Moderate/gentle flow conditions, complex cold bending/shaping is required, or you need a more cost-effective option for standard condensers.

Application

Condenser and Heat Exchanger Tubes in:
- Power Plants (fossil fuel, nuclear - for the main surface condenser)
- Marine Vessels (shipboard condensers, oil coolers)
- Desalination Plants (Multi-Stage Flash and Multi-Effect Distillation heat recovery sections)
- Offshore Platforms (cooling systems)
- Chemical and Petrochemical Processing coolers.

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