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ASTM B111 UNS C68700 / CuZn20Al2 Cold Drawn Aluminum Brass Tube for Heat Exchanger Condenser Applications

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ASTM B111 UNS C68700 / CuZn20Al2 Cold Drawn Aluminum Brass Tube for Heat Exchanger Condenser Applications

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

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

Product Overview

ASTM B111 UNS C68700 aluminum brass tube, also designated CuZn20Al2 (CuZn20Al2As in EN 12451 / JIS H3300 C6870 / BS 2871 CN110 nomenclature), is a seamless copper–zinc–aluminum alloy heat exchanger tube engineered for continuous duty in aggressive cooling-water service. Its nominal chemistry of approximately 76–79% copper, 1.8–2.5% aluminum and a controlled arsenic addition of 0.02–0.06% to inhibit dezincification allows the alloy to develop a thin, self-repairing aluminum oxide film across both the inner and outer surfaces, which gives it outstanding resistance to seawater, brackish water, chloride-bearing cooling media and impingement attack at elevated flow velocities. We can supply ASTM B111/ASME SB111 copper alloy tube with different temper such as O60 annealed, H55 light drawn, H80 hard drawn.

Equivalent Grades of ASTM B111 UNS C68700 Aluminum Brass Tube

Material Designation	GB/T 8890	ASTM B111	BS 2871	JIS H3300	DIN 1785
Aluminum Brass	HAL77-2	UNS C68700	CZ110	C6870T	CuZn20Al2

Choose C68700 if: High water flow rates (>2 m/s), turbulent seawater, elevated temperatures, or power plant/heat exchanger tube applications are involved.

C44300 (Admiralty) vs. C68700 (Aluminum Brass)

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

Chemical Composition % of ASTM B111 UNS C68700 Aluminum Brass Tube

Designation	Cu	Sn	Al	As	Ni	Fe	Mn	Pb max.	Zn
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

Copper or Copper Alloy UNS No.	Temper Designation (Standard)	Temper Designation (Former)	Tensile Strength (min ksi)	Yield Strength (min ksi)
C68700	O61	annealed	50	18

Applications

Condenser and heat exchanger tubes in:

1.Coastal power plants – main surface condensers, drain coolers, feedwater heater drains, auxiliary oil and air coolers
2. Marine / offshore – shipboard seawater cooling, engine jacket water coolers, central cooling units, ballast and fire-line heat exchangers
3. Desalination – MSF brine heaters and stage condensers, MED preheaters, heat recovery trains
4. Petrochemical & chemical – cooling-water

Inquiry and Price Term

We quote this ASTM B111 UNS C68700 aluminum brass tube on an FOB Shanghai basis as standard, with CFR and CIF terms available against your nominated destination port. MOQ starts at 500 kg per size. Lead time is 35 days for standard straight lengths, and 45-50 days for custom U-bent, coiled or low-fin tubes. Payment terms are 30% T/T deposit with the balance paid before shipment Or against copy of B/L.

ASTM B111 UNS C68700 / CuZn20Al2 aluminum brass seamless heat exchanger tube

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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