ASTM B111 C68700 Aluminum Brass Tube | UNS C68700 Seamless Heat Exchanger Tubes

ASTM B111 C68700 Aluminum Brass Tubes are widely used in heat exchangers, condensers, power plants, and seawater desalination systems due to their excellent resistance to seawater corrosion, erosion, and biofouling.

The alloy UNS C68700 (CuZn22Al2) contains aluminum and arsenic which significantly improves corrosion resistance in marine environments, making it one of the most reliable materials for condenser tubes and heat exchanger tubing.

Our ASTM B111 aluminum brass seamless tubes are manufactured with strict quality control and are widely exported to power plants, marine engineering projects, offshore industries, and petrochemical facilities worldwide.

ASTM B111 C68700 Aluminum Brass Tube Specifications

Standard

• ASTM B111

• ASME SB111

• ASTM B395

• ASME SB395

• EN 12451

Material Grade

• UNS C68700

• CuZn22Al2 Aluminum Brass

Product Types

• Seamless Aluminum Brass Tube

• Heat Exchanger Tube

• Condenser Tube

• Evaporator Tube

Size Range

Outer Diameter
2 mm – 350 mm

Wall Thickness
0.3 mm – 50 mm

Length
Up to 18 meters or customized

Tube Form

• Straight Tubes

• U-Bent Tubes for Heat Exchangers

Testing

All tubes are fully inspected with:

• 100% Eddy Current Testing

• 100% Hydraulic Pressure Testing

• Chemical Composition Analysis

• Mechanical Property Testing

• Dimensional Inspection

• ASTM B111 C68700 Chemical Composition

The aluminum content significantly enhances seawater corrosion resistance, making C68700 aluminum brass ideal for marine heat exchanger applications.

ASTM B111 C68700 Aluminum Brass Tube Equivalent Grades

Applications of ASTM B111 C68700 Aluminum Brass Tubes

Due to its superior resistance to saltwater corrosion and erosion, C68700 aluminum brass tubing is widely used in:

Power Plants

• Surface Condensers

• Feedwater Heaters

• Turbine Oil Coolers

Marine & Offshore Engineering

• Seawater Cooling Systems

• Ship Condensers

• Offshore Heat Exchangers

Petrochemical Industry

• Fuel Oil Heaters

• Air Coolers

• Process Heat Exchangers

Seawater Desalination Plants

• Evaporator Tubes

• Distiller Tubes

• Brine Heater Tubes

Other applications include:

• Boiler Blowdown Heat Exchangers

• Steam Ejectors

• Compressed Air Intercoolers

• Oil Well Pump Liners

Copper Alloy Heat Exchanger Tubes We Supply

Besides ASTM B111 C68700 Aluminum Brass Tubes, we also manufacture and export other copper alloy condenser tubes.

Admiralty Brass – C44300

Excellent resistance to general corrosion for moderate temperature condenser applications.

Copper Nickel 90/10 – C70600

Superior resistance to turbulent seawater corrosion, widely used in marine heat exchangers.

Copper Nickel 80/20 – C71000

Commonly used in feedwater heaters and evaporators.

Copper Nickel 70/30 – C71500

High durability for high-temperature seawater condensers and superheaters.

Why Choose Our ASTM B111 C68700 Aluminum Brass Tubes

✔ Strict quality inspection
✔ Competitive factory price
✔ Custom sizes available
✔ Fast delivery for international orders
✔ Global export experience

Our aluminum brass tubes are supplied to power plants, marine shipyards, and desalination projects worldwide.

FAQ – ASTM B111 C68700 Aluminum Brass Tubes

What is ASTM B111 C68700 aluminum brass tube?

ASTM B111 C68700 is a copper-zinc-aluminum alloy tube designed for heat exchanger and condenser applications, especially in seawater environments.

Why is C68700 used for seawater condensers?

C68700 aluminum brass contains aluminum and arsenic, which greatly improve resistance to seawater corrosion, erosion, and biofouling, making it ideal for marine cooling systems.

What is the equivalent grade of C68700?

Common equivalents include:

• CuZn22Al2 (EN)

• CZ110 (BS)

• 2.0460 (DIN)

• HAL77-2 (China GB)

What industries use aluminum brass tubes?

Major industries include:

• Power generation

• Marine engineering

• Petrochemical plants

• Offshore platforms

• Seawater desalination plants