ASTM B111 C44300 Tube – UNS C44300 (Admiralty Brass Tube)
ASTM B111 C44300 Tube, designated as UNS C44300, is commonly known as Admiralty Brass Tube. It is a copper-zinc alloy with a small addition of tin, specifically developed to improve corrosion resistance in fresh water and mildly saline environments. ASTM B111 UNS C44300 tubes are widely used in condensers and heat exchangers due to their good thermal conductivity, resistance to dezincification, and long service life. Manufactured in seamless form, these tubes ensure uniform wall thickness, dimensional accuracy, and reliable performance in continuous heat transfer operations.
Key Features
- Excellent resistance to corrosion in fresh and cooling water
- Improved resistance to dezincification due to tin addition
- Good thermal conductivity for efficient heat exchange
- Seamless construction ensures consistent quality
- Good formability, bending, and fabrication characteristics
- Cost-effective solution for condenser and heat exchanger systems
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | C44300 |
| EN | CuZn28Sn1 |
| DIN | 2.0410 |
| ISO | CuZn28Sn1 |
Sizes
- Outside Diameter: 6 mm to 114.3 mm
- Wall Thickness: 0.7 mm to 6 mm
- Length: Up to 6 meters, random or cut lengths available
- Form: Straight lengths and U-bend tubes
ASTM B111 C44300 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper (Cu) | 70.0 – 73.0 |
| Zinc (Zn) | Balance |
| Tin (Sn) | 0.9 – 1.2 |
| Lead (Pb) | Max 0.07 |
| Iron (Fe) | Max 0.06 |
| Nickel (Ni) | Max 0.5 |
C44300 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 310 MPa |
| Yield Strength | ≥ 105 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 80 HRB |
UNS C44300 Physical Properties
| Property | Value |
|---|---|
| Density | 8.47 g/cm³ |
| Melting Point | ~900°C |
| Thermal Conductivity | ~120 W/m·K |
| Electrical Conductivity | ~28% IACS |
Type of C44300 Tubes
- C44300 Seamless Tubes
- C44300 U-Bend Tubes
- Condenser Tubes
- Heat Exchanger Tubes
Applications
- Surface Condensers
- Heat exchangers
- Power Plants,
- Shipbuilding
- Marine Condensers
- Oil refineries
- VAC systems, and
- Industrial Cooling Water Systems
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