Aluminium Brass Fin Tubes are specially engineered heat transfer elements for use in condensers and heat exchangers, and industrial cooling systems in challenging marine and power generation applications. These finned tubes are made from UNS C68700 aluminium brass tubes, which provide resistance to seawater impingement and have a larger surface area for greater heat transfer efficiency. They are built to be robust enough for use in applications where a high degree of reliability, corrosion resistance and long service life are demanded. Choosing the right base tube, fin type and quality is critical to ensure the project's operating conditions are met. Amardeep Steel Centre offers aluminium brass fin tubes for domestic and international industrial projects, with customized dimensions, technical specifications and bulk supply requirements.
Technical Data
Specifications of Aluminium Brass Fin Tubes
| Parameter | Specification Detail |
|---|---|
|
Material of Construction |
Aluminium Brass ASTM B111 / ASME SB111 UNS C68700 |
|
Finning Standard |
As per ASME SB359 / ASTM B359 |
|
Outer Diameter (OD) |
9.52 mm to 25.40 mm (3/8" to 1") |
|
Wall Thickness |
0.71 mm to 2.11 mm |
|
Fins Per Inch (FPI) |
19 FPI and 26 FPI standard (custom FPI on request) |
|
Fin Types Available |
Integral Low Fin (L Type), LL Type, KL Type |
|
Temper Condition |
As-Finned Temper |
|
Nondestructive Testing |
100% Hydrostatically tested post-finning |
|
Stress Relieving |
In-house continuous electric conveyor belt furnace (per SB359) |
|
Documentation |
EN 10204 3.1 Mill Test Certificate (MTC) supplied with every order |
Chemical Compositions of Aluminium Brass Fin Tubes
| Element | Composition Percentage (UNS C68700) |
|---|---|
|
Copper (Cu) |
76.0% – 79.0% |
|
Aluminium (Al) |
1.8% – 2.5% |
|
Arsenic (As) |
0.02% – 0.06% (Dezincification Inhibitor) |
|
Iron (Fe) |
0.06% Max |
|
Lead (Pb) |
0.07% Max |
|
Zinc (Zn) |
Remainder |
Aluminium Brass Fin Tubes Mechanical Properties
| Parameter | Minimum Value |
|---|---|
|
Tensile Strength (Min) |
330 MPa (48 ksi) |
|
Yield Strength (Min) |
125 MPa (18 ksi) |
|
Elongation (in 2 inches / 50 mm, Min) |
40% |
Dimensions Chart of Aluminium Brass Fin Tubes
| Base Outer Diameter (OD) | Base Wall Thickness | Available Fin Pitch |
|---|---|---|
|
9.52 mm – 12.70 mm |
0.71 mm – 1.24 mm |
19 or 26 FPI |
|
15.88 mm – 19.05 mm |
1.24 mm – 1.65 mm |
19 or 26 FPI |
|
22.20 mm – 25.40 mm |
1.65 mm – 2.11 mm |
19 or 26 FPI |
Aluminium Brass Fin Tubes Size Chart
| Imperial OD | Metric OD (mm) | Wall Thickness (SWG/G) | Wall Thickness (mm) | Nominal Bore / ID (mm) | Weight per Metre (kg) |
|---|---|---|---|---|---|
|
3/16″ |
4.76 |
22G |
0.71 |
3.34 |
0.077 |
|
1/4″ |
6.35 |
20G |
0.91 |
4.53 |
0.133 |
|
1/4″ |
6.35 |
18G |
1.22 |
3.91 |
0.167 |
|
1/4″ |
6.35 |
16G |
1.63 |
3.09 |
0.206 |
|
5/16″ |
7.94 |
20G |
0.91 |
6.11 |
0.172 |
|
3/8″ |
9.52 |
20G |
0.91 |
7.70 |
0.210 |
|
3/8″ |
9.52 |
18G |
1.22 |
7.08 |
0.271 |
|
3/8″ |
9.52 |
16G |
1.63 |
6.26 |
0.345 |
|
1/2″ |
12.70 |
20G |
0.91 |
10.88 |
0.288 |
|
1/2″ |
12.70 |
18G |
1.22 |
10.26 |
0.375 |
|
1/2″ |
12.70 |
16G |
1.63 |
9.44 |
0.484 |
|
9/16″ |
14.29 |
20G |
0.91 |
12.47 |
0.550 |
|
5/8″ |
15.88 |
20G |
0.91 |
14.06 |
0.365 |
|
5/8″ |
15.88 |
18G |
1.22 |
13.44 |
0.479 |
|
5/8″ |
15.88 |
16G |
1.63 |
12.62 |
0.622 |
|
3/4″ |
19.05 |
20G |
0.91 |
17.23 |
0.442 |
|
3/4″ |
19.05 |
18G |
1.22 |
16.61 |
0.583 |
|
3/4″ |
19.05 |
16G |
1.63 |
15.79 |
0.761 |
|
3/4″ |
19.05 |
10G |
3.25 |
12.55 |
1.376 |
|
7/8″ |
22.22 |
18G |
1.22 |
19.78 |
0.687 |
|
7/8″ |
22.22 |
16G |
1.63 |
18.96 |
0.899 |
|
1″ |
25.40 |
20G |
0.91 |
23.00 |
0.597 |
|
1″ |
25.40 |
18G |
1.22 |
22.96 |
0.791 |
|
1″ |
25.40 |
16G |
1.63 |
22.14 |
1.038 |
|
1-1/8″ |
28.58 |
16G |
1.63 |
25.32 |
1.177 |
|
1-1/4″ |
31.75 |
18G |
1.22 |
29.31 |
0.998 |
|
1-1/4″ |
31.75 |
16G |
1.63 |
28.49 |
1.316 |
|
1-3/8″ |
34.92 |
16G |
1.63 |
31.66 |
1.454 |
|
1-1/2″ |
38.10 |
18G |
1.22 |
35.66 |
1.206 |
|
1-1/2″ |
38.10 |
16G |
1.63 |
34.84 |
1.593 |
|
1-1/2″ |
38.10 |
10G |
3.25 |
31.60 |
3.040 |
|
1-3/4″ |
44.45 |
18G |
1.22 |
42.01 |
1.410 |
|
1-3/4″ |
44.45 |
10G |
3.25 |
37.95 |
3.600 |
|
2″ |
50.80 |
18G |
1.22 |
48.36 |
1.621 |
|
2″ |
50.80 |
16G |
1.63 |
47.54 |
2.418 |
|
2″ |
50.80 |
10G |
3.25 |
44.30 |
4.140 |
|
2-1/4″ |
57.20 |
10G |
3.25 |
50.70 |
4.700 |
|
2-1/2″ |
63.50 |
16G |
1.63 |
60.24 |
2.703 |
|
2-1/2″ |
63.50 |
10G |
3.25 |
57.00 |
5.248 |
|
2-3/4″ |
69.85 |
10G |
3.25 |
63.35 |
5.810 |
|
3″ |
76.20 |
10G |
3.25 |
69.70 |
6.354 |
|
3-1/4″ |
82.55 |
10G |
3.25 |
76.05 |
6.910 |
|
3-1/2″ |
88.90 |
10G |
3.25 |
82.40 |
7.460 |
|
3-3/4″ |
95.25 |
10G |
3.25 |
88.75 |
8.020 |
|
4-1/4″ |
107.95 |
10G |
3.25 |
101.45 |
9.670 |
|
5″ |
133.50 |
10G |
3.25 |
127.00 (ID) |
11.800 |
|
6″ |
158.90 |
10G |
3.25 |
152.40 (ID) |
13.900 |
Specifying tubes for a marine condenser or seawater cooled exchanger? Share your operating conditions and we will confirm the right fin density and temper within 24 hours.
Request a QuoteApplications and Industrial Uses of Aluminium Brass Fin Tubes
- Marine Steam Condensers
- Power Plant Condensers
- Seawater Heat Exchangers
- Desalination Plants
- Shipboard Cooling Systems
- Industrial Cooling Systems
- Refineries and Petrochemical Plants
- HVAC and Chiller Systems
Frequently Asked Questions
What are Aluminium Brass Fin Tubes used for?
Aluminium Brass Fin Tubes are used in heat exchangers, marine condensers, power plants, desalination plants, and industrial cooling systems.
What is UNS C68700 Aluminium Brass?
UNS C68700 Aluminium Brass is a copper-zinc alloy containing approximately 2% aluminium. It offers good resistance to seawater impingement and corrosion.
What is the difference between Aluminium Brass and Admiralty Brass Fin Tubes?
Aluminium Brass Fin Tubes use UNS C68700 alloy with aluminium, while Admiralty Brass Fin Tubes use UNS C44300 alloy with tin and arsenic for corrosion resistance.
Are Aluminium Brass Fin Tubes suitable for seawater applications?
Yes, Aluminium Brass Fin Tubes are suitable for seawater applications due to their good resistance to impingement attack and erosion in high-velocity seawater.
How are Aluminium Brass Fin Tubes manufactured?
Aluminium Brass Fin Tubes are manufactured by cold-forming helical fins directly onto the outer surface of plain aluminium brass tubes.
Can Aluminium Brass Fin Tubes be supplied in custom sizes and lengths?
Yes, Aluminium Brass Fin Tubes can be supplied in custom sizes, fin configurations, and lengths according to project requirements and manufacturing capabilities.
Are Aluminium Brass Fin Tubes suitable for power plant condensers?
Yes, Aluminium Brass Fin Tubes are suitable for power plant condensers, particularly in applications requiring efficient heat transfer and resistance to seawater corrosion.
