C33000 Low Leaded Brass Tubes are copper zinc tubes that consist of 66% copper, 34% zinc, and 0.25-0.7% lead. It has a good ratio of machinability and formability which makes the tubes easy to bend, flare, expand, and machine precisely. The machinability rating of 60, when compared with free-cutting brass C36000 makes the tubes ideal for the manufacturing process that demands neat machining and precise dimensions. These tubes can be available in seamless form according to ASTM B135 and welded form as per ASTM B587. The uses of these tubes include components of pumps, cylinder liners, plumbing traps, and fittings. Amardeep Steel supplies C33000 brass tubes with material certifications and customized dimensional requirements.
Technical Data
Specifications of C33000 Low Leaded Brass Tubes
| Parameter | Specification |
|---|---|
|
Material |
UNS C33000 low leaded brass (Alloy 330, CDA 330) |
|
Seamless tube |
ASTM B135 / ASME SB135 (B135M metric) |
|
Welded tube |
ASTM B587 / ASME SB587 |
|
Other specifications |
Federal WW-T-791, MIL-T-46072, AMS 4555 |
|
Outside diameter |
6 mm to 100 mm |
|
Wall thickness |
0.5 mm to 6 mm |
|
Length |
Up to 6 m, or cut to length |
|
Temper |
OS050 and OS025 (annealed), H80 (hard drawn) |
|
Tests |
Chemical analysis, tensile, flattening, expansion, hydrostatic or eddy current to ASTM B135 |
|
Documents |
EN 10204 3.1 or ASTM mill test report; third party on request |
Chemical Compositions of C33000 Low Leaded Brass Tubes
| Element | UNS C33000 (%) | Nominal (%) |
|---|---|---|
|
Copper (Cu) |
65.0 to 68.0 |
66.0 |
|
Lead (Pb) |
0.25 to 0.7 |
0.5 |
|
Iron (Fe), max |
0.07 |
n/a |
|
Zinc (Zn) |
Remainder |
33.5 |
Mechanical Properties of C33000 Low Lead Brass Tubes
| Temper | Condition | Tensile (MPa / ksi) | Yield 0.5% ext. (MPa / ksi) | Elongation (%) | Hardness |
|---|---|---|---|---|---|
|
OS050 |
Annealed, 0.050 mm grain |
324 / 47 |
103 / 15 |
60 |
64 HRF |
|
OS025 |
Annealed, 0.025 mm grain |
359 / 52 |
138 / 20 |
50 |
75 HRF |
|
H80 |
Hard drawn |
517 / 75 |
414 / 60 |
7 |
80 HRB |
Physical Properties of C33000 Low Lead Brass Tubes
| Property | Value |
|---|---|
|
Density |
8.50 g/cm³ (0.307 lb/in³) |
|
Melting range |
904 to 938°C (1660 to 1720°F) |
|
Thermal conductivity |
About 116 W/m·K (67 Btu/ft·h·°F) |
|
Electrical conductivity |
26% IACS |
|
Thermal expansion (20 to 300°C) |
About 20.2 x 10⁻⁶ /K (11.2 x 10⁻⁶ /°F) |
|
Modulus of elasticity |
About 103 GPa (15,000 ksi) |
|
Machinability |
60 (C36000 = 100) |
|
Cold forming / hot forming |
Excellent / poor |
|
Soldering / brazing |
Excellent / good |
|
Oxy acetylene, gas shielded arc, butt and spot welding |
Fair |
|
Coated metal arc and seam welding |
Not recommended |
Equivalent Grades of C33000 Low Lead Brass Tubes
| System | Designation |
|---|---|
|
UNS / CDA |
C33000, Alloy 330 |
|
EN / BS / JIS |
No direct equivalent grade |
|
Tube standards often quoted |
JIS H3300, BS 2871, DIN 1785, GB/T 8890 are tube standards that cover other brasses, not C33000 equivalents |
|
Related UNS |
C26000 (70/30, unleaded); C33200 (high leaded tube brass); C36000 (free cutting rod) |
Size Chart of C33000 Low Lead Brass Tubes
| Outer Diameter (OD) | Wall Thickness | Length |
|---|---|---|
|
6 mm |
0.7 mm |
Up to 6 m |
|
12.7 mm |
0.9 mm |
Up to 6 m |
|
19.05 mm |
1.2 mm |
Up to 6 m |
|
25.4 mm |
1.6 mm |
Up to 6 m |
|
50.8 mm |
2.0 mm |
Up to 6 m |
Applications and Industrial Uses of C33000 Low Lead Brass Tubes
- Pump and hydraulic cylinder components
- Pneumatic cylinder liners
- Plumbing traps and J-bends
- Brass ferrules and compression fittings
- Electrical connector and terminal components
- Industrial instrument tubing
- Machined sleeves and bushings
- Lighting, furniture and decorative tube
Frequently Asked Questions
1. What are C33000 low lead brass tubes?
C33000 brass tubes are copper-zinc alloy tubes containing a small lead addition to improve machinability while maintaining good formability.
2. What is the lead content in C33000 brass?
C33000 brass contains approximately 0.25-0.7% lead.
3. What are the applications of C33000 low lead brass tubes?
They are used in pump components, cylinder liners, plumbing traps, J-bends, ferrules, and industrial fittings.
4. Which ASTM standard covers C33000 brass tubes?
Seamless C33000 brass tubes are covered by ASTM B135, while welded tubes are covered by ASTM B587.
5. Is C33000 brass easy to bend and form?
Yes, C33000 brass offers good cold formability and can be bent, flared, and expanded.
6. Is C33000 lead free?
No. It contains 0.25-0.7% lead, above the 0.25% NSF/ANSI 372 limit for drinking water parts.
7. Can C33000 brass tubes be welded or brazed?
Yes, C33000 brass tubes can be brazed. Welding is possible but requires suitable procedures and careful control due to the lead content.
8. What is the machinability of C33000?
C33000 has a machinability rating of approximately 60, compared with 100 for free-cutting brass C36000.
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