BS 2871 PT 3 CZ - 111 Admiralty Brass Tubes are alloy copper zinc tubes that are used in condensers, heat exchangers and marine coolers. CZ111 consists of 70%-73% copper, 1.0%-1.5% tin and 0.02%-0.06% arsenic with zinc making up the remainder. The tin improves the anti-corrosive properties while the arsenic prevents dezincification. These tubes are utilized in power plants, shipbuilding and industrial cooling systems where dependable heat transfer and corrosion resistance is required. Unless BS EN 12451 is ordered, the buyer should check material equivalency and dimensions before placing an order as BS 2871 Part 3 has been superseded. Amardeep Steel offers CZ111 Admiralty Brass tubes in O, TA and M condition as per the drawing or to the current BS EN 12451 standard.
Applications and Industrial Uses of BS 2871 Part 3 CZ111 Admiralty Brass Tubes
- Fresh and Brackish Water Condensers
- Sugar Mill Evaporators and Juice Heaters
- Steam Surface Condensers
- Power Plant Heat Exchangers
- Shipbuilding Cooling Systems
- Oil Refinery Heat Exchangers
- Industrial Evaporators
- Industrial Process Coolers
Technical Data
Specifications of BS 2871 Part 3 CZ111 Admiralty Brass Tubes
| Parameter | Details |
|---|---|
|
Standard |
BS 2871 Part 3 (superseded by BS EN 12451) |
|
Grade |
CZ111 admiralty brass (CuZn28Sn1As) |
|
Type |
Seamless, cold drawn |
|
Outside Diameter |
4 mm to 254 mm |
|
Wall Thickness |
0.3 mm to 25 mm |
|
Length |
1 m to 6 m, or as required |
|
Conditions (tempers) |
O (annealed), TA (temper annealed), M (as manufactured); also sold as soft, quarter hard and half hard |
|
End Finish |
Plain or bevelled |
|
Surface Finish |
Clean, smooth, bright |
|
Packing |
Seaworthy export packing |
Chemical Compositions of BS 2871 Part 3 CZ111 Admiralty Brass Tubes
| Element (%) | BS 2871 CZ111 | ASTM C44300 | DIN CuZn28Sn1 | NF CuZn29Sn1 | JIS C4430 |
|---|---|---|---|---|---|
|
Copper (Cu) |
70.0 to 73.0 |
70.0 to 73.0 |
70.0 to 72.5 |
70.0 to 73.0 |
70.0 to 73.0 |
|
Tin (Sn) |
1.0 to 1.5 |
0.9 to 1.2 |
0.9 to 1.3 |
0.9 to 1.2 |
0.9 to 1.2 |
|
Arsenic (As) |
0.02 to 0.06 |
0.02 to 0.06 |
0.02 to 0.035 |
0.02 to 0.06 |
0.02 to 0.06 |
|
Lead (Pb), max |
0.07 |
0.07 |
0.07 |
0.07 |
0.07 |
|
Iron (Fe), max |
0.06 |
0.06 |
0.07 |
0.06 |
0.06 |
|
Nickel (Ni), max |
Not specified |
Not specified |
0.1 |
Not specified |
Not specified |
|
Phosphorus (P), max |
Not specified |
Not specified |
0.01 |
Not specified |
Not specified |
|
Zinc (Zn) |
Remainder |
Remainder |
Remainder |
Remainder |
Remainder |
Mechanical Properties of BS 2871 Part 3 CZ111 Admiralty Brass Tubes
| Property (typical, all tempers) | Value |
|---|---|
|
Tensile Strength |
About 360 to 500 MPa |
|
Elongation in 50 mm, min |
20% |
|
Hardness |
45 to 90 HRB |
CZ111 Admiralty Brass Physical Properties
| Property (at 20°C / 68°F) | Metric | Imperial |
|---|---|---|
|
Density |
8.53 g/cm³ |
0.308 lb/in³ |
|
Melting Range (solidus to liquidus) |
899°C to 938°C |
1650°F to 1720°F |
|
Thermal Expansion (20°C to 300°C) |
20.2 µm/m·°C |
11.2 x 10â»â¶ /°F |
|
Thermal Conductivity |
111 W/m·K |
64 Btu/ft·hr·°F |
|
Specific Heat |
377 J/kg·K |
0.09 Btu/lb·°F |
|
Electrical Conductivity |
25% IACS |
25% IACS |
|
Electrical Resistivity |
0.069 µΩ·m |
41.5 ohm·cmil/ft |
|
Modulus of Elasticity (tension) |
110 GPa |
16,000 ksi |
|
Modulus of Rigidity |
41 GPa |
6,000 ksi |
Equivalent Grades of BS 2871 Part 3 CZ111 Admiralty Brass Tubes
| Standard | Designation |
|---|---|
|
BS 2871 Part 3 (UK, superseded) |
CZ111 |
|
EN 12451 (current European) |
CuZn28Sn1As, CW706R |
|
ASTM B111 / ASME SB111 (American) |
UNS C44300 |
|
ISO |
CuZn28Sn1 |
|
DIN 1785 (former German) |
CuZn28Sn1, 2.0470 |
|
NF A 51-102 (former French) |
CuZn29Sn1 |
|
JIS H 3300 (Japan) |
C4430 |
|
IS 1545 (India) |
CuZn29Sn1As |
|
GB/T 8890 (China) |
HSn70-1 |
|
Common Names |
Admiralty Brass, Arsenical Admiralty Brass |
BS 2871 Part 3 CZ111 Admiralty Brass Tubes Dimensions Chart
| Outside Diameter (mm) | Wall Thickness (mm) | Standard Wire Gauge / Schedule | Nominal Internal Diameter (mm) | Max Internal Working Pressure (N/mm2 / Bar) |
|---|---|---|---|---|
|
9.52 (3/8") |
0.91 |
20 SWG |
7.70 |
13.4 N/mm2 (134 Bar) |
|
12.70 (1/2") |
0.91 |
20 SWG |
10.88 |
10.0 N/mm2 (100 Bar) |
|
12.70 (1/2") |
1.22 |
18 SWG |
10.26 |
13.4 N/mm2 (134 Bar) |
|
15.88 (5/8") |
1.22 |
18 SWG |
13.44 |
10.7 N/mm2 (107 Bar) |
|
15.88 (5/8") |
1.63 |
16 SWG |
12.62 |
14.3 N/mm2 (143 Bar) |
|
19.05 (3/4") |
1.22 |
18 SWG |
16.61 |
8.9 N/mm2 (89 Bar) |
|
19.05 (3/4") |
1.63 |
16 SWG |
15.79 |
11.9 N/mm2 (119 Bar) |
|
25.40 (1") |
1.22 |
18 SWG |
22.96 |
6.7 N/mm2 (67 Bar) |
|
25.40 (1") |
1.63 |
16 SWG |
22.14 |
8.9 N/mm2 (89 Bar) |
|
25.40 (1") |
2.03 |
14 SWG |
21.34 |
11.1 N/mm2 (111 Bar) |
|
31.75 (114") |
1.63 |
16 SWG |
28.49 |
7.1 N/mm2 (71 Bar) |
|
38.10 (112") |
1.63 |
16 SWG |
34.84 |
5.9 N/mm2 (59 Bar) |
|
38.10 (112") |
2.03 |
14 SWG |
34.04 |
7.4 N/mm2 (74 Bar) |
|
50.80 (2") |
2.03 |
14 SWG |
46.74 |
5.5 N/mm2 (55 Bar) |
Frequently Asked Questions
What are BS 2871 Part 3 CZ111 Admiralty Brass Tubes?
BS 2871 Part 3 CZ111 Admiralty Brass Tubes are copper-zinc alloy tubes containing tin and a small amount of arsenic. They are used in condensers and heat exchangers.
Has BS 2871 Part 3 been replaced by BS EN 12451?
Yes, BS 2871 Part 3 was superseded by BS EN 12451 for seamless round copper alloy heat exchanger tubes. Confirm the exact grade and requirements before substituting standards.
What are CZ111 Admiralty Brass Tubes used for?
They are used in marine condensers, power plants, heat exchangers, industrial coolers, and seawater cooling systems.
Why is Admiralty Brass used in condenser tubes?
Admiralty Brass offers good heat transfer, corrosion resistance, and resistance to dezincification, making it suitable for many condenser applications.
Are CZ111 Admiralty Brass Tubes resistant to seawater corrosion?
They resist corrosion well in fresh and brackish cooling water. For clean seawater at higher velocities, aluminium brass or copper nickel is usually preferred.
Are BS 2871 CZ111 tubes seamless or welded?
CZ111 condenser tubes are commonly supplied as seamless tubes, subject to the specified product requirements.
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