C36500 low leaded brass tubes are made from leaded Muntz metal (UNS C36500), a 60/40 brass called Muntz metal with about 58-61% copper and 0.25-0.7% lead. Its two phase alpha beta structure gives it good mechanical strength with excellent hot working properties suitable for forging, extrusion and heavy duty component production. The controlled lead addition makes the material easier to cut, making it easier to drill and to make precision cuts in the manufacture. The tubes and hollow bars are used frequently in condenser tube sheets, heat exchanger baffles, valve bodies and marine equipment. Amardeep Steel is providing C36500 Brass Tubes and Hollow Bar of customized dimensions and with material test certificates as per industries requirement.
Technical Data
Specifications of C36500 Low Leaded Brass Tubes
| Parameter | Specification |
|---|---|
|
Material |
UNS C36500 leaded Muntz metal (60/40 leaded brass) |
|
Forms |
Extruded hollow bar, tube to drawing; plate, forging stock and rod on request |
|
Outside diameter |
30 mm to 120 mm |
|
Inside diameter |
20 mm to 80 mm |
|
Length |
Up to 4 m, or cut to length |
|
Condition |
As extruded or cold drawn |
|
Tests |
Chemical analysis, hardness, dimensional and visual; tensile on request |
|
Documents |
EN 10204 3.1 stating C36500 and actual lead content; third party on request |
Chemical Compositions of C36500 Low Leaded Brass Tubes
| Element | UNS C36500 (%) |
|---|---|
|
Copper (Cu) |
58.0 to 61.0 |
|
Lead (Pb) |
0.25 to 0.70 |
|
Tin (Sn), max |
0.25 |
|
Iron (Fe), max |
0.15 |
|
Zinc (Zn) |
Remainder |
|
Cu + named elements, min |
99.5 |
C36500 Low Leaded Brass Tubes Mechanical Properties
| Property | Value | Basis |
|---|---|---|
|
Tensile strength |
370 to 420 MPa |
Forgings |
|
Tensile strength, min by size |
430 (2 to 12 mm) to 310 MPa (50 to 75 mm) |
Extruded rod |
|
0.2% proof strength |
140 to 185 MPa |
Forgings |
|
Elongation |
20 to 30% |
Forgings |
|
Hardness |
80 to 105 HRB |
Forgings |
Physical Properties of C36500 Low Leaded Brass Tubes
| Physical property | Value |
|---|---|
|
Density |
8.41 to 8.44 g/cm³ |
|
Melting range |
887 to 899°C |
|
Electrical conductivity |
About 28% IACS |
|
Thermal conductivity |
About 123 W/m·K |
|
Thermal expansion |
About 20.9 x 10⁻⁶ /K |
Equivalent Grades of C36500 Low Leaded Brass Tubes
| System | Designation |
|---|---|
|
UNS |
C36500 (leaded Muntz metal) |
|
EN (nearest) |
CuZn39Pb0.5, CW610N (nearest match; confirm limits) |
|
BS (former) |
CZ123 leaded Muntz metal (confirm) (note: CZ109 is unleaded Muntz metal) |
|
IS |
IS 319 leaded 60/40 brass (confirm grade) |
Machining, Hot Working and Corrosion Properties of C36500 Low Leaded Brass Tubes
| Property | Value |
|---|---|
|
Machinability |
About 60 (C36000 = 100) |
|
Hot working / forging range |
640 to 720°C; excellent hot formability |
|
Cold forming |
Limited |
|
Soldering / brazing |
Excellent / good |
|
Gas shielded arc and oxy acetylene welding |
Fair |
Applications and Industrial Uses of C36500 Low Leaded Brass Tubes
- Condenser tube sheets and support components
- Heat exchanger baffles and structural parts
- Marine valve bodies and valve components
- Shipbuilding hardware and fittings
- Industrial pump housings and components
- Heavy duty pipe connectors and flanges
- Forged marine equipment components
- Industrial machinery sleeves and bushings
Frequently Asked Questions
1. What are C36500 low leaded brass tubes?
C36500 brass tubes are copper zinc alloy products made from leaded Muntz metal, offering good strength, machinability, and hot working properties.
2. What is the lead content in C36500 brass?
C36500 brass contains approximately 0.25 to 0.7% lead.
3. What is the difference between C36500 and C36000 brass?
C36500 is a 60/40 brass with good strength and hot working properties, while C36000 is a free machining brass with higher lead content and better machinability.
4. Is C36500 brass suitable for marine applications?
It is used for marine hardware and tube sheets, but it can dezincify in seawater. C46400 naval brass is a safer choice for seawater tube sheets.
5. Is C36500 brass suitable for potable water applications?
No, C36500 contains 0.25 to 0.7% lead and is unsuitable for applications requiring lead free drinking water compliance.
6. Which ASTM standards cover C36500?
ASTM B124 covers forging stock and ASTM B283 covers die forgings. C36500 tubes and hollow bars are generally manufactured to drawing.
7. Why is C36500 used for tube sheets?
C36500 offers good strength, hot workability, and machinability, allowing tube holes to be drilled cleanly at a lower cost than naval brass.
8. Is C36500 available as tube?
Yes, C36500 is available as extruded hollow bar or tube to drawing, typically in outer diameters from 30 to 120 mm.
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