CZ112 naval brass pipe is made from a copper, zinc and tin naval brass alloy used in marine and industrial applications where corrosion resistance and mechanical strength are required. It contains approximately 62% copper, 1.0–1.5% tin, and 0.2–0.6% lead, which improves its machinability compared with low-lead naval brass. With good resistance to seawater and dezincification, this alloy is suitable for heat exchanger fittings, marine fasteners, valve components, and subsea tools. Under British Standards, this material was designated CZ112 and is now identified by the European designation CW712R.Amardeep Steel manufactures and supplies CZ112 Naval Brass Pipes, tubes, and hollow bars in India with customized dimensions and material documentation.
Technical Data
Specifications of CZ112 Naval Brass Pipe
| Parameter | Specification |
|---|---|
|
Material |
CZ112 naval brass, EN CW712R (CuZn36Sn1Pb) |
|
Standards |
BS 2874 CZ112 (withdrawn); EN 12163 CW712R; tube made to drawing |
|
Forms |
Hollow bar, extruded tube, pipe to drawing, rod and plate on request |
|
Outside Diameter (OD) |
Up to 100 mm |
|
Bore / Inside Diameter (ID) |
From 20 mm |
|
Length |
Up to 4 m, or cut to custom length |
|
Condition |
As extruded or drawn; temper agreed on order |
|
Testing |
Chemical analysis, hardness, dimensional and visual; tensile on request |
|
Documentation |
EN 10204 3.1 showing CZ112 and CW712R; 3.2 or third party on request |
Chemical Compositions of CZ112 Naval Brass Pipe
| Element | CW712R, EN 12163 (%) | CZ112, stockist data (%) |
|---|---|---|
|
Copper (Cu) |
61.0 to 63.0 |
59.5 to 63.5 |
|
Tin (Sn) |
1.0 to 1.5 |
1.0 to 1.5 |
|
Lead (Pb) |
0.2 to 0.6 |
0.2 to 0.6 |
|
Iron (Fe), max |
0.1 |
— |
|
Nickel (Ni), max |
0.2 |
— |
|
Other Impurities, total max |
0.2 |
— |
|
Zinc (Zn) |
Remainder |
Remainder |
Physical Properties of CZ112 Naval Brass Pipe
| Physical Property | Value |
|---|---|
|
Density |
8.4 g/cm³ |
|
Melting Point |
About 900 to 915°C |
|
Thermal Conductivity |
121 W/m·K |
|
Thermal Expansion (20 to 200°C) |
20 x 10⁻⁶ /K |
|
Specific Heat |
380 J/kg·K |
|
Electrical Conductivity |
26% IACS |
Cz112 Naval Brass Pipe Mechanical Properties
| Property | Value |
|---|---|
|
Tensile Strength |
340 to 400 MPa |
|
0.2% Proof Strength |
160 to 200 MPa |
|
Elongation |
20 to 25% |
|
Hardness |
80 to 135 HB |
Equivalent Grades of Cz112 Naval Brass Pipe
| Standard | Designation |
|---|---|
|
BS 2874 (Withdrawn) |
CZ112 |
|
EN Standards |
CW712R, CuZn36Sn1Pb |
|
UNS / ASTM |
Nearest match is C46400 (contains less tin and 0.2% max lead) |
Fabrication and Joining Properties of Cz112 Naval Brass Pipe
| Process / Property | Rating or Parameter |
|---|---|
|
Hot Working Range |
650 to 750°C; hot formability is excellent |
|
Cold Formability |
Fair |
|
Annealing Temperature |
450 to 600°C |
|
Stress Relieving Temperature |
225 to 325°C |
|
Machinability Rating |
About 40 to 60 (Free-cutting brass C36000 = 100) |
|
Soldering / Brazing |
Soldering is excellent; brazing is good |
|
Oxy-acetylene / Butt Resistance Welding |
Good |
|
Gas Shielded Arc / Spot & Seam Welding |
Fair |
Applications and Industrial Uses of Cz112 Naval Brass Pipe
- Marine Heat Exchangers
- Shipbuilding and Ship Repair
- Heat Exchanger Tube Plates
- Offshore Oil and Gas Equipment
- Desalination Plants
- Marine Pumping Systems
- Valve Stems and Pump Parts
- Marine Hardware and Fastening Systems
Frequently Asked Questions
1. What is CZ112 naval brass pipe?
CZ112 naval brass pipe is a tin-containing copper-zinc alloy designed for good strength and corrosion resistance in marine environments.
2. Is CZ112 naval brass suitable for seawater applications?
Yes, CZ112 offers good resistance to seawater corrosion, making it suitable for selected marine applications.
3. What is the difference between CZ112 and C46400 naval brass?
C46400 is the nearest US equivalent to CZ112, but it contains less tin (0.5–1%) and allows a maximum lead content of 0.2%.
4. Is CZ112 naval brass suitable for marine heat exchangers?
Yes, CZ112 is used for heat exchanger tube plates and fittings. The tubes themselves are usually made from Admiralty brass or aluminium brass.
5. What is the density of CZ112 naval brass?
The typical density of CZ112 naval brass is about 8.4 g/cm³.
6. Can CZ112 naval brass be welded and machined?
Yes, CZ112 can be machined and welded using suitable procedures, although welding requires proper process selection.
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