Nov 20, 2025 Leave a message

Aluminum Brass Alloy ASTM B111 C687 Heat exchangers tubing

C68700 Aluminum Brass Tube PDF

 

Products Description

Alloy C687 tubing, also known as Aluminum Brass, is a high-strength copper-zinc-aluminum alloy with added arsenic to enhance corrosion resistance. This alloy is ideal for seawater, brackish water, and biofouling environments.

 

Chemical Composition

Copper (Cu): 76.00 – 79.00%

Iron max (Fe): 0.60%

Lead max (Pb): 0.07%

Zinc (Zn): 21.00%

Arsenic (As): 0.20 – 0.06%

Aluminum (Al): 1.80 – 2.50%

C68700 seawater tube
ASTM B111 C68700
C68700 copper
C68700 brass pipe

ASTM B111 UNS C68700 Mechanical Properties

Copper or Copper Alloy UNS No. Temper Designation Annealing temperature, °C Tensile Strength, min Yield Strength, min HV
  Code Name ksi Mpa ksi Mpa
C68700 O61 Annealed above 650 50 345 18 125 150

 

ASTM B111 UNS C68700 Physical Properties

Copper or Copper Alloy UNS No. Melting Point Density Coefficients of Linear Thermal Expansion Specific Heat Capacity Thermal Conductivity
  °C °F lb/in3 g/cm3 1×10-6/°C @ 20.0 – 300 °C 1×10-6/°F @ 70.0 – 570 °F cal/g-°C, 20 °C BTU/lb-°F @ 70°F W/m-K, 20 °C BTU/ft2/ft/h/°F @ 70°F
 
C68700 932-971 1710-1780 0.301 8.33 18.5 10.3 0.09 0.09 100.4 58

 

Industry Applications

Heat exchangers

Evaporators

Distiller

Marine

Chemical processing

Aerospace

Defense

 

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about us

Our Product Portfolio

We supply an extensive inventory of copper products in various forms, grades, and tempers to meet your exact specifications.

1. Copper & Copper Alloy Tubes/Pipes

Type: Copper Seamless Tube, Copper Welded Tube, Capillary Tube, Refrigeration Tube, Heat Exchanger Tube, Condenser Tube, Dehydrated Tube.

Key Alloys: C10200 (OFHC Copper), C11000 (ETP Copper), C12200 (DHP Copper), C44300, C68700, C70600 (Copper Nickel 90/10), C71500 (Copper Nickel 70/30).

 

2. Copper & Copper Alloy Sheets/Plates

Type: Copper Sheet, Copper Plate, Copper Foil, Copper Thin Sheet, Copper Thick Plate, Embossed Sheet, Perforated Sheet.

Key Alloys: C10200, C11000, C17200 (Beryllium Copper), C26000 (Cartridge Brass), C26800, C28000 (Muntz Metal).

 

3. Copper & Copper Alloy Bars/Rods

Type: Copper Round Bar, Copper Square Bar, Copper Hexagonal Bar, Copper Flat Bar, Copper Wire Rod.

Key Alloys: C10100, C11000, C36000 (Free-Cutting Brass), C38500 (Architectural Bronze).

 

4. Copper & Copper Alloy Strips/Wires

Type: Copper Strip, Copper Coil, Copper Flat Wire, Copper Bare Wire, Copper Braided Wire, Copper Tin-Plated Wire.

Key Alloys: C11000, C26000 (Brass Strip), C51900 (Phosphor Bronze), C52100, C70400.

 

Quality & Standards

We guarantee that all our products comply with international and national standards, ensuring performance, reliability, and safety.

International Standards: ASTM, EN, DIN, JIS, ISO.

Common Standards: ASTM B111,ASTM B68, B75, B88, B96, B152, B187, B465.

 

Why Choose Us?

One-Stop Shop: A comprehensive range of copper products simplifies your sourcing.

Quality Assured: Rigorous inspection and material traceability.

Global Logistics: Efficient and reliable shipping to destinations worldwide.

Technical Support: Expert assistance with material selection and specification.

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