Chemical Composition of ASTM B111 C23000 Brass Copper Pipe

ASTM B111 Copper Tube PDF

Key Points:
Lead-Free or Low-Lead: The most notable feature of C23000 is its very low lead content (≤ 0.05%), significantly lower than free-cutting brasses such as C36000. This makes it more environmentally friendly and suitable for lead-sensitive applications such as food contact, drinking water systems, and musical instrument mouthpieces.
Pure: Beyond the primary copper and zinc, very few intentionally added elements are present, and the total amount of impurities is strictly controlled.

Color and Appearance of ASTM B111 C23000 Bendable Copper Tubing:
It has a warm golden yellow (rose gold or pink gold hue), slightly redder than high-zinc brasses such as C26000 cartridge brass, hence the name "red brass." This color is very attractive and decorative.

ASTM B111 C23000 copper waste pipe offers excellent corrosion resistance:
It exhibits good corrosion resistance in atmospheric environments (especially non-industrial atmospheres), freshwater, and many aqueous solutions. Its corrosion resistance is superior to that of high-zinc brasses and leaded brasses.
It exhibits moderate corrosion resistance in seawater. Dezincification (selective attack on zinc) may occur with prolonged exposure, but this typically occurs more slowly than with high-zinc brasses.
Corrosion resistance is good in welded joints.

ASTM B111 C23000 seamless copper pipe offers excellent ductility and cold working properties:
Because it contains no lead or intentionally added elements that restrict workability, C23000 exhibits very good ductility and cold working properties (e.g., bending, stamping, deep drawing, and spinning).
Higher strength and hardness can be easily achieved through cold working (work hardening).

Strength and hardness of ASTM B111 C23000 copper pipe for hot water:
Annealed (O60): Relatively soft. Typical Properties: Tensile strength ≈ 260 MPa, hardness ~ HRB 50.
Cold-worked (H04 semi-hard): Tensile strength ≈ 415 MPa, hardness ~ HRB 70. Different levels of strength and hardness can be achieved through varying degrees of cold working.

Hot-work properties of ASTM B111 C23000 refrigeration copper tubing:
Hot-work properties are acceptable (better than high-zinc brasses such as C26000, but not as good as lead-containing brasses). Hot rolling or hot forging is possible within the 590-820°C temperature range. However, the hot working range is generally narrow, so care must be taken.

Weldability of ASTM B111 C23000 copper air line:
Excellent. One of the best weldable brass grades. Commonly used methods include fusion welding (TIG, MIG), brazing, and soldering. Welded joints are strong and resistant to cracking.

Machinability of ASTM B111 C23000 copper pipe for water:
Fair. Because it contains no lead (lead acts as a lubricant and chip breaker in brass), its machinability is significantly inferior to that of free-cutting brasses (such as C36000). It is difficult to machine on high-speed automatic lathes, resulting in rapid tool wear and long chips. Appropriate tool selection and cutting parameters are essential.

Electrical and thermal conductivity of ASTM B111 C23000 HVAC copper:
Electrical and thermal conductivity are average for copper alloys. While significantly lower than pure copper (approximately 37% IACS), they are superior to materials like stainless steel.

Due to its excellent corrosion resistance, weldability, cold formability, non-toxicity, and attractive color, C23000 is widely used in:
Architectural decoration: architectural paneling, moldings, shutters, door handles, locks, hinges, and railing fittings. Hardware: Lighting, furniture hardware, handles, buckles, and small architectural hardware (where corrosion resistance and aesthetics are required).
Plumbing Fittings and Valves: Due to its lead-free or low-lead properties, it is ideal for use in drinking water system pipes, faucet valve bodies, joints, and flanges (especially for products requiring low-lead or lead-free certification).

Musical Instruments: Parts of brass instruments (such as bells, tuning slides, and piston cylinders).
Keys and connectors of woodwind instruments.
Key components of instruments such as saxophones, trumpets, and trombones.

Electrical Components: Terminals, switches, and spring contacts requiring excellent electrical conductivity and corrosion resistance (especially after cold working and strengthening).
Crafts and Jewelry: Its beautiful rose gold color is used to create decorative items and sculptural components.
Heat Sinks: Where thermal conductivity is required and aesthetics are important.
Mechanical Parts: Gaskets, sleeves, and structural parts that require bending.

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As a professional enterprise dedicated to global copper product trade since 2008, GNEE Metal Group deeply recognizes the quality and responsibility embodied in the ASTM B111 standard. This standard not only specifies chemical composition and mechanical properties but also represents a comprehensive quality commitment spanning manufacturing processes to testing and verification. GNEE solemnly assures global customers that every ASTM B111-standard condenser tube and copper alloy tubing we supply will strictly adhere to its requirements for seamless manufacturing, annealing treatment, eddy current testing, and various mechanical performance tests. 

 

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