UNS C44300 Copper-Zinc-Tin Alloy, widely known as Admiralty Brass, is an inhibited copper alloy designed for superior corrosion resistance in water service. GNEE supplies high-quality ASTM B111 / ASME SB111 UNS C44300 Admiralty Brass Tubes, meeting stringent international standards.
ASTM B111 UNS C44300 Brass Tube
ASTM B111 / ASME SB111 UNS C44300 Admiralty Brass Tubes are ideal for heat exchanger applications. This alloy is frequently specified in oil and gas applications requiring non-corrosive properties. While both C44300 and C68700 offer good corrosion resistance, C44300 Admiralty Brass Seamless Tubes provide a minimum tensile strength of 310 MPa and a minimum yield strength of 105 MPa.
| Specification | Details |
|---|---|
| Name | Admiralty Brass Tube UNS C44300 |
| Standard | ASTM B111 / ASME SB111 (Seamless Condenser Tubes and Ferrule Stock) |
| Type | ASTM B111 UNS C44300 Brass Tube |
| Shape | Tube |
| Outside Diameter (OD) | 1/4" – 4 1/8" |
| Wall Thickness (WT) | 0.40 – 3.0 mm |
| Length | As per requirement |
| Temper | Soft annealed; special tempers on request |
Typical Applications
ASTM B111 / ASME SB 111 C44300 Admiralty Brass is used in a variety of industrial applications, including:
Evaporator Tubing
Heat Exchanger Tubing
Condenser Tube Plates
Distiller Tubes
Oil Well Pump Liners
Ferrules and Bourdon Tubes
Industrial Steam Turbine Condensers (alongside C70600 and C71500 copper-nickel tubes)
Chemical Composition (ASTM B111 C44300)
| Grade | Cu | Sn | As | Pb (max) | Fe (max) | Zn |
|---|---|---|---|---|---|---|
| C44300 | 70.0-73.0 | 0.9-1.2 | 0.02-0.06 | 0.07 | 0.06 | Remainder |
Dimensional Specifications
| Product | Admiralty Brass Tube ASTM B111 C44300 |
|---|---|
| Application | Air-conditioning and refrigeration, heat exchange, connecting tubes, solar, natural gas, LPG, vent piping. |
| Material Standards | ASTM, JIS, EN |
| Alloy Standards | C44300, C68700, C71500, C70600, C12200 |
| Outside Diameter | 4.76 mm to 28.58 mm |
| Thickness | 0.4 mm to 3.0 mm |
Equivalent Materials and International Standards
| Standard | BS 2871 PART3 | ASTM B 111 | DIN 1785 | NFA 51 102 | JIS H3300 | IS 1545 |
|---|---|---|---|---|---|---|
| Symbol | CZ 111 | C 44300 | CuZn28Sn1 | CuZn29Sn1 | C 4430 | CuZn29Sn1As |
| Chemical Composition (%) | ||||||
| Cu | 70.0-73.0 | 70.0-73.0 | 70.0-72.5 | 70.0-73.0 | 70.0-73.0 | 70.0-73.0 |
| Sn | 1.0-1.5 | 0.9-1.2 | 0.9-1.3 | 0.9-1.2 | 0.9-1.2 | 1.0-1.5 |
| Pb (max) | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 |
| Fe (max) | 0.06 | 0.06 | 0.07 | 0.06 | 0.06 | 0.06 |
| As | 0.02-0.06 | 0.02-0.06 | 0.02-0.035 | 0.02-0.06 | 0.02-0.06 | 0.02-0.06 |
| Zn | REM'DER | REM'DER | REM'DER | REM'DER | REM'DER | REM'DER |
| Mechanical Properties | ||||||
| Condition/Temper | M / TA / O | O61 | F36 / F32 | - | O / TA / D | O / TA / D |
| Yield Strength (N/mm²) | – | 105 min | 140-220 | – | – | – |
| Tensile Strength (N/mm²) | – | 310 min | 320-360 | – | 314 min | 375 max |
| Elongation (%) | – | – | 45-55 min | – | 30 min | – |
| Grain Size (mm) | 0.05 max | 0.010-0.045 | – | 0.010-0.045 | 0.010-0.045 | 0.010-0.04 |
FAQ
1. What is ASTM B111 C44300 equivalent to in British Standard?
ASTM B111 C44300 Admiralty Brass is equivalent to BS 2871 Part 3 CZ 111. Both designations share the same chemical composition and mechanical property requirements for seamless condenser tubes.
2. C44300 vs C68700: Which offers better corrosion resistance?
Both C44300 Admiralty Brass and C68700 Aluminum Brass offer good corrosion resistance. C44300 is specifically inhibited with arsenic to prevent dezincification in polluted or stagnant water, whereas C68700 is better suited for high-velocity seawater due to its aluminum content.
3. What is the JIS equivalent of UNS C44300 material?
The JIS equivalent for UNS C44300 Admiralty Brass is JIS H3300 C4430. Their chemical compositions are functionally identical.
4. What is the DIN standard and designation for C44300 Admiralty Brass?
Under the German DIN standard (DIN 1785), UNS C44300 is designated as CuZn28Sn1.
5. What are the primary applications of C44300 Admiralty Brass Tubes?
C44300 Admiralty Brass Tubes are primarily used in steam turbine condensers, heat exchangers, evaporators, distillers, and oil well pump liners, especially where cooling water is brackish or polluted.
6. C44300 vs C70600: Which is used in steam turbine condensers?
Both C44300 Admiralty Brass and C70600 Copper-Nickel (90/10) are widely used in industrial steam turbine condensers. C44300 is a cost-effective choice for resistance to polluted water, while C70600 provides superior overall seawater corrosion resistance.
7. What is the annealing condition for C44300 Admiralty Brass tubes?
C44300 Admiralty Brass tubes are typically supplied in a soft annealed temper (equivalent to O61) to ensure optimal ductility for roller expansion into tube sheets.
8. What is the French standard equivalent for C44300 Admiralty Brass?
Under the French standard NFA 51 102, the equivalent material for C44300 Admiralty Brass is designated as CuZn29Sn1.
9. What is the grain size requirement for ASTM B111 C44300 tubes?
Per ASTM B111, the average grain size for C44300 Admiralty Brass tubes must be within the range of 0.010 mm to 0.045 mm.
10. What are the dimensional capabilities for C44300 Admiralty Brass Tubes?
C44300 Admiralty Brass Tubes can be supplied with an outside diameter ranging from 4.76 mm to 28.58 mm and wall thicknesses from 0.4 mm to 3.0 mm. Custom dimensions are available upon request.
How Do We Package Copper Heat Exchanger Tubes for Global Delivery?
Poor packaging destroys even the best copper heat exchanger tube. As a professional copper heat exchanger tube factory serving copper heat exchanger tube USA, Europe, UAE, Saudi Arabia, and India, we follow military-grade export packaging standards to ensure zero damage during sea or air freight.
Our Standard Packaging Process:
| Packaging Stage | Material / Method | Purpose |
|---|---|---|
| Individual Tube Protection | Anti-rust VCI paper + plastic end caps | Prevents moisture, dust, and scratches on copper tube heat exchanger inner surfaces. |
| Bundling | Nylon straps + wooden spacers | Keeps copper heat exchanger tube OD 19mm, 1 inch, or 5/8 inch sizes organized and vibration-free. |
| Moisture Barrier | Thick PE film wrap (heat-shrunk) | Blocks humidity during long sea voyages to copper heat exchanger tube Germany or Saudi Arabia. |
| Outer Packing | Export-grade plywood cases or steel-banded wooden crates | Withstands stacking and rough handling. Each crate labeled with PO number, alloy (e.g., SB111 C70600), and quantity. |
| Documentation | Packing list + Mill Test Certificate (MTC) attached outside | Customs clearance support for copper heat exchanger tube stockist and distributor partners. |
For U-Bundle Orders: U tube heat exchanger and U tube bundle heat exchanger are placed in dedicated steel jigs inside the crate to prevent bending radius distortion.
Our Factory & Equipment
| Equipment Type | Specification / Capability | Quality Impact |
|---|---|---|
| Horizontal Continuous Casting Line | 10-ton capacity | Produces homogeneous copper alloy tube for heat exchanger billets with zero porosity. |
| Three-Roll Piercing Mill | Up to 60mm OD | Precision wall thickness control for heat exchanger tube wall thickness as low as 0.5mm. |
| Cold Drawing Bench | 5 draws in sequence | Achieves tight tolerances on copper heat exchanger tube length and heat exchanger pipe diameter. |
| Straightening & Cutting Line | CNC servo-controlled | Burr-free cutting for copper heat exchanger tube 3/4 inch and 1 inch to exact project lengths. |
| U-Bending Machine | CNC mandrel type | Produces u tube condenser and U tube bundle heat exchanger without kinking or ovality. |
| Eddy Current Tester | NDT (Non-Destructive Testing) | 100% inspection of C70600 tube and C71500 tube for pinholes or cracks per ASTM B111 pdf standards. |
| Hydrostatic Tester | Up to 200 bar | Validates heat exchanger tube expansion and tube rolling integrity. |
| Spectrometer | Optical emission (OES) | Confirms chemical composition of ASME SB111, EN 12451, and JIS H3300 grades on every batch. |
Our Certifications & Compliance:
ASTM B111 pdf and ASME SB111 pdf full traceability.
ISO 9001:2015 quality management system.
Third-party inspection accepted: SGS, BV, Lloyds, or TUV.
Copper heat exchanger tube life expectancy testing reports available upon request.
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