CZ134 naval brass pipe is made from a high-leaded copper-zinc-tin alloy designed for fast and efficient machining of precision components. This grade contains approximately 1.30–2.20% lead and 0.50–1.00% tin, offering good marine corrosion resistance, improved chip-breaking characteristics, and excellent machinability. Its lead content makes it suitable for automatic screw machines and CNC machining operations used to manufacture marine fittings, valve stems, pump bushings, sleeves, and threaded fasteners. CZ134 is preferred for components requiring complex machining rather than extensive cold forming. The same alloy is identified under ASTM as C48500 naval brass pipe.Amardeep Steel supplies CZ134 naval brass pipe and hollow bar from India, made to your sizes.
Technical Data
Specifications of CZ134 Naval Brass Pipe
| Parameter | Specification Details |
|---|---|
|
Material Designation |
CZ134 High Leaded Naval Brass (CW711R / CuZn36Pb2Sn1 / UNS C48500) |
|
Governing Standards |
BS 2874 CZ134; EN 12164 CW711R (rod); custom tube/hollow made to drawing |
|
Product Forms |
Extruded seamless tube, heavy-wall hollow bar, custom pipe to drawing |
|
Outside Diameter (OD) |
30 mm to 120 mm |
|
Inside Diameter (ID) |
20 mm to 80 mm |
|
Length |
Random mill lengths up to 4 meters, or custom cut-to-length pieces |
|
Condition / Temper |
As Extruded or Cold Drawn |
|
Testing Capability |
Chemical analysis, tensile, elongation, hardness, dimensional check, visual testing |
|
Certifications |
EN 10204 3.1 material test certificates; 3.2 third-party inspection available on request |
Chemical Compositions of CZ134 Naval Brass Pipe
| Element (%) | CZ134 / UNS C48500 Standard Range | EN CW711R (CuZn36Pb2Sn1) Range |
|---|---|---|
|
Copper (Cu) |
59.0 to 62.0 |
59.5 to 61.5 |
|
Tin (Sn) |
0.50 to 1.00 |
0.50 to 1.00 |
|
Lead (Pb) |
1.30 to 2.20 |
1.30 to 2.20 |
|
Iron (Fe) |
0.10 max |
0.10 max |
|
Nickel (Ni) |
Not specified |
0.30 max |
|
Other Impurities |
0.20 max |
0.20 max |
|
Zinc (Zn) |
Remainder (Nominal 37.5) |
Remainder |
CZ134 Naval Brass Pipe Mechanical Properties
| Property | Value Range |
|---|---|
|
Tensile Strength (Rm) |
410 MPa min |
|
Elongation (A) |
18% min |
|
Applicable Size Range |
Round 2 to 50 mm; Hex/Square 3 to 50 mm |
Physical Properties of CZ134 Naval Brass Pipe
| Physical / Fabricating Property | SI Metric Units | Imperial / Reference Units |
|---|---|---|
|
Density |
8.44 g/cm³ |
0.305 lb/in³ |
|
Melting Range |
888°C to 899°C |
1630°F to 1650°F |
|
Electrical Conductivity |
~26% IACS |
~26% IACS |
|
Thermal Conductivity (at 20°C) |
~116 W/m·K |
~67 Btu/ft·h·°F |
|
Machinability Rating |
~70 |
Free-Cutting Brass C36000 = 100 |
|
Soldering & Brazing |
Excellent (Soldering) |
Good (Brazing) |
|
Cold Forming Capability |
Poor |
Not recommended for flaring/bending |
Equivalent Grades of CZ134 Naval Brass Pipe
| Standard Organization | Designation / Material Code |
|---|---|
|
British Standard (BS) |
BS 2874 CZ134 |
|
European Norm (EN) |
CuZn36Pb2Sn1 / Material Number CW711R |
|
UNS / ASTM |
UNS C48500 (Covered under ASTM B21) |
|
Australian Standard |
AS 485 |
Applications and Industrial Uses of CZ134 Naval Brass Pipe
- Marine Valve Stems
- Shipbuilding Fittings and Connectors
- Marine Pump Bushings
- Precision-Turned Marine Components
- Threaded Marine Fasteners
- Industrial Sleeves and Bushings
- Seawater Pump Components
- CNC-Machined Marine Hardware
Frequently Asked Questions
What is CZ134 naval brass?
CZ134 is high-leaded naval brass: a 60/40 copper-zinc alloy containing 0.5%–1% tin and 1.3%–2.2% lead for rapid machining.
What is the UNS equivalent of CZ134?
The direct UNS equivalent for high-leaded naval brass CZ134 is UNS C48500.
How much lead does CZ134 contain?
CZ134 contains 1.30% to 2.20% lead, providing the highest machinability rating among naval brass grades.
What is the difference between CZ134 and CZ112?
CZ112 (CW712R) has 0.2 to 0.6% lead; CZ134 has 1.3 to 2.2%, so it machines far faster but forms less well.
Is CZ134 the same as C48200?
No. C48200 contains 0.40% to 1.0% lead, whereas CZ134 (C48500) contains 1.3% to 2.2% lead.
What is the machinability of CZ134?
CZ134 has a machinability rating of approximately 70 (where free-cutting brass C36000 is 100), roughly double that of standard naval brass.
Is CZ134 available as pipe?
Yes, CZ134 is supplied as heavy-wall hollow bar or extruded seamless tube made to drawing, typically from 30 mm to 120 mm OD.
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