SB 111 C44300 refers to Admiralty Brass seamless tubes manufactured to the requirements of ASME SB111 specification. The "SB" prefix indicates this is the ASME Boiler and Pressure Vessel Code version of the widely used ASTM B111 standard. This designation is mandatory for heat exchanger and condenser tubing installed in pressure vessels, power boilers, and nuclear components where ASME code compliance is legally required.
GNEE supplies SB 111 C44300 Admiralty Brass tubes with full material certification and traceability to meet global pressure vessel fabrication requirements.
SB 111 C44300
| Component | Meaning |
|---|---|
| SB | ASME Boiler and Pressure Vessel Code material specification |
| 111 | Specification number for seamless copper and copper-alloy condenser tubes |
| C44300 | UNS alloy designation for Inhibited Admiralty Brass (Cu-Zn-Sn-As) |
ASME SB111 vs ASTM B111: Key Differences
| Aspect | ASTM B111 | ASME SB111 |
|---|---|---|
| Governing Body | ASTM International | ASME (American Society of Mechanical Engineers) |
| Application | General industrial use | Pressure vessel and boiler construction |
| Code Acceptance | Not automatically code-stamped | Accepted under ASME BPVC Section II |
| Material Certification | Standard Mill Test Report (MTR) | ASME Code-compliant certification required |
| Legal Requirement | Commercial specification | Mandatory for ASME-stamped pressure vessels |
| Technical Content | Identical to SB111 | Identical to ASTM B111 |
Key Takeaway: The technical requirements (chemical composition, mechanical properties, dimensional tolerances, and testing) are identical between ASTM B111 and ASME SB111. The difference is purely regulatory: SB111 material must be sourced from an ASME-approved manufacturer and carries additional certification requirements for pressure vessel code compliance.
Chemical Composition of SB 111 C44300
The chemical requirements for SB 111 C44300 are identical to ASTM B111 C44300:
| Element | Content (%) |
|---|---|
| Copper (Cu) | 70.0 – 73.0 |
| Tin (Sn) | 0.9 – 1.2 |
| Arsenic (As) | 0.02 – 0.06 |
| Lead (Pb) | 0.07 max |
| Iron (Fe) | 0.06 max |
| Zinc (Zn) | Remainder |
The Arsenic content (0.02-0.06%) is critical. This inhibitor is what qualifies the material as "Inhibited Admiralty Brass" and provides resistance to dezincification in polluted or saline water service.
Mechanical Properties (SB 111 C44300, O61 Temper)
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength, min. | 310 MPa | 45 ksi |
| Yield Strength, min. | 105 MPa | 15 ksi |
| Elongation in 50 mm (2 in.), min. | 30% | 30% |
| Hardness (Rockwell 30T) | 35 – 60 HR30T | 35 – 60 HR30T |
Material is supplied in the O61 (annealed) temper to ensure adequate ductility for roller expansion into tube sheets.
Scope of ASME SB111
ASME SB111 covers seamless copper and copper-alloy tubes for the following applications:
| Application Category | Examples |
|---|---|
| Surface Condensers | Power plant steam condensers |
| Heat Exchangers | Shell and tube exchangers, feedwater heaters |
| Evaporators | Desalination and process evaporators |
| Pressure Vessel Tubing | Any ASME Section VIII stamped vessel |
| Boiler Components | ASME Section I power boiler tubing |
Alloys Covered Under ASME SB111
C44300 is one of several copper alloys specified in ASME SB111. Common alloys include:
| UNS Designation | Common Name | Typical Application |
|---|---|---|
| C44300 | Admiralty Brass (Inhibited) | Polluted/brackish water condensers |
| C68700 | Aluminum Brass | High-velocity seawater |
| C70600 | Copper-Nickel 90/10 | General seawater service |
| C71500 | Copper-Nickel 70/30 | Severe seawater conditions |
| C12200 | DHP Copper | Fresh water, HVAC |
| C71640 | Copper-Nickel-Iron | High-strength seawater applications |
Testing and Inspection Requirements (ASME SB111)
ASME SB111 mandates specific testing protocols beyond standard commercial practice:
| Test Requirement | Description |
|---|---|
| Chemical Analysis | Verification of composition per ASTM E478 |
| Tensile Testing | One test per 1000 lbs or fraction thereof |
| Flattening Test | Verifies ductility and absence of defects |
| Flaring Test | Verifies tube-end expandability |
| Eddy Current Testing | Non-destructive examination of entire tube length |
| Hydrostatic Testing | Alternative to eddy current at manufacturer's option |
| Grain Size | Typically 0.010 – 0.045 mm average grain diameter |
When is SB 111 C44300 Required vs ASTM B111 C44300?
| Application Scenario | Required Specification |
|---|---|
| Pressure vessel with ASME U-Stamp | ASME SB111 mandatory |
| Power boiler with ASME S-Stamp | ASME SB111 mandatory |
| Commercial heat exchanger (non-code) | ASTM B111 acceptable |
| Replacement tubes for existing ASME vessel | ASME SB111 mandatory |
| Nuclear components (ASME Section III) | ASME SB111 with additional NCA-3800 requirements |
| International project with ASME specification | ASME SB111 required |
FAQ
1. What is SB 111 C44300 material?
SB 111 C44300 is Inhibited Admiralty Brass seamless tube manufactured to ASME SB111 specification, the Boiler and Pressure Vessel Code version of ASTM B111. It is mandatory for heat exchanger tubing in ASME-stamped pressure vessels.
2. SB111 vs ASTM B111: What is the difference?
Technically identical in chemistry and mechanical properties. The difference is regulatory: ASME SB111 is required for ASME-stamped pressure vessels and boilers, while ASTM B111 is the commercial specification for general industrial use.
3. What is the equivalent of SB 111 C44300 in British Standard?
The British Standard equivalent of SB 111 C44300 material is CZ111 manufactured to BS 2871 Part 3. The material chemistry and temper requirements are identical.
4. Is SB 111 C44300 the same as ASTM B111 C44300?
Yes, the technical requirements are identical. However, material certified to SB111 must come from an ASME-approved manufacturer and carries additional documentation for pressure vessel code compliance.
5. C44300 vs C68700: Which is specified under SB111 for seawater?
Both C44300 Admiralty Brass and C68700 Aluminum Brass are covered under ASME SB111. C44300 is preferred for polluted or stagnant seawater; C68700 is preferred for high-velocity clean seawater where impingement erosion is the primary concern.
6. What temper is SB 111 C44300 supplied in?
SB 111 C44300 is supplied in the O61 (Annealed) temper. This soft condition provides the ductility required for roller expansion and flaring into tube sheets without cracking.
7. Is SB 111 C44300 suitable for marine condenser applications?
Yes. SB 111 C44300 Admiralty Brass is specifically designed for marine condenser tubing exposed to brackish or polluted seawater. Its Arsenic inhibitor provides dezincification resistance essential for long service life in marine environments.
8. What testing is required for SB 111 C44300 tubes?
SB 111 C44300 tubes require chemical analysis, tensile testing, flattening and flaring tests, and non-destructive examination (eddy current or hydrostatic) of the entire tube length per ASME SB111 requirements.
9. Can ASTM B111 C44300 material be used for ASME pressure vessels?
No. Only material certified to ASME SB111 with full documentation from an ASME-approved manufacturer is acceptable for ASME-stamped pressure vessel construction. ASTM B111 material cannot be re-certified post-production.
10. What is the chemical composition requirement for Arsenic in SB 111 C44300?
SB 111 C44300 requires 0.02-0.06% Arsenic. This controlled addition defines the material as "Inhibited" Admiralty Brass and is essential for preventing dezincification in water service. Material without Arsenic is unacceptable under SB111.
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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