ASME SB111 C44300 Seamless Brass Tube Copper Tube For Heat Exchanger

ASME B111 C44300 Brass Tube Copper Alloy Steel Seamless Tube, Heat Exchanger Tube

1. Material Overview

C44300 (Admiralty Brass) is a copper-zinc alloy with enhanced corrosion resistance, primarily used in heat exchangers, condensers, and marine applications.

• Composition:

  • Cu (Copper): 70–73%

  • Zn (Zinc): Remaining balance

  • Sn (Tin): 0.9–1.2% (added to improve corrosion resistance)

  • As (Arsenic): 0.02–0.06% (to inhibit dezincification)

2. Key Standards

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• ASME B111:

  • Title: Standard for Seamless Copper and Copper Alloy Pipe and Tube

  • Scope: Specifies requirements for seamless tubes made of copper and copper alloys, including dimensions, tolerances, mechanical properties, and testing methods.

  • C44300 Compliance: Covers chemical composition, temper designations (e.g., O60, H58), and performance criteria.

3. Performance Characteristics

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• Corrosion Resistance:

  • Excellent resistance to saltwater, steam, and industrial cooling fluids due to tin and arsenic additives.

  • Resists dezincification and erosion-corrosion in high-velocity environments.

• Thermal Conductivity: High thermal efficiency (≈109 W/m·K), ideal for heat transfer applications.

• Mechanical Properties:

  • Tensile Strength: 330–450 MPa (depending on temper)

  • Yield Strength: 125–345 MPa

  • Hardness: 55–155 HV

4. Applications

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• Heat Exchangers & Condensers:

  • Power plant condensers, HVAC systems, and refinery heat exchangers.

  • Preferred in marine environments due to saltwater resistance.

• Marine Engineering:

  • Seawater piping, shipboard condensers, and desalination systems.

• Industrial Cooling Systems:

  • Chemical processing, oil & gas cooling loops.

5. Manufacturing & Testing (ASME B111)

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• Seamless Tube Process: Produced via extrusion or cold drawing to ensure uniform microstructure.

• Temper Designations:

  • O60 (Annealed): Soft, high ductility for forming.

  • H58 (Hard-Drawn): Higher strength for structural applications.

• Mandatory Tests:

  • Hydrostatic/Pneumatic Testing: Ensures leak-tightness.

  • Eddy Current Testing (ET): Detects surface defects.

  • Flattening/Flaring Tests: Validates ductility.

6. Advantages Over Other Copper Alloys

7. Compliance & Certification

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• ASME B111 Compliance: Requires certification of chemical composition, mechanical properties, and dimensional tolerances.

• Additional Certifications:

  • ASTM B111: Equivalent to ASME B111 for seamless copper alloy tubes.

  • EN 12451: European standard for copper alloy seamless pipes.