ThePipingMart Blog Grades Red Brass (UNS C23000) – Composition, Properties and Uses

Red Brass (UNS C23000) – Composition, Properties and Uses

Red Brass UNS C23000

Red Brass UNS C23000 has extensive applications in the aerospace, automotive, and plumbing industries due to its unique combination of mechanical, chemical, and physical properties. In this blog post, we’ll discuss the composition, chemical properties, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment options, and machinability of Red Brass UNS C23000.

What Forms is Red Brass Available at Piping Mart?

  • Red Brass Nut
  • Red Brass Bar
  • Red Brass Bolt
  • Red Brass Pipe
  • Red Brass Screw
  • Red Brass Tubing
  • Red Brass Valves
  • Red Brass Washers
  • Red Brass Flanges
  • Red Brass Fasteners
  • Red Brass Electrodes
  • Red Brass Stud Bolts

Red Brass Composition

Red Brass UNS C23000 is an alloy consisting primarily of copper (85-89%), zinc (5-9%), lead (0.5-2%), tin (0.2-1.5%), and trace amounts of iron and arsenic. It also contains traces of other metals, such as phosphorus and aluminium. This combination creates a strong material with excellent corrosion resistance and good machinability.

Element Content (%)
Cu 85
Zn 15

Red Brass Chemical Properties

The main elements that makeup Red Brass UNS C23000 are copper (Cu), Zinc (Zn), lead (Pb), tin (Sn), iron (Fe), arsenic (As), phosphorus (P), and aluminum (Al). Copper is the primary component in this alloy; it makes up 85-89% of its composition by weight. Zinc contributes 5-9%, while lead makes up 0.5-2%. Tin contributes 0.2-1.5%, while iron contributes trace amounts along with arsenic and other elements such as phosphorus and aluminium, which make up minor fractions of the total composition by weight. These various elements give this alloy its unique characteristics – strength combined with excellent corrosion resistance and good machinability.

Red Brass Mechanical Properties

Red Brass UNS C23000 has a tensile strength range between 50 to 80 ksi depending on the cold work applied during the manufacturing process; it also has a yield strength range between 25 to 45 ksi depending on the cold work applied during the manufacturing process; it has an elongation rate between 20%-40%, again depending on the cold work applied during the manufacturing process; it has a Brinell Hardness number between 90 to 140 BHN; it also has a Rockwell hardness number ranging from 30 HRC to 40 HRC; finally it has an ultimate shear stress value between 16 ksi to 28 ksi depending on the cold work applied during the manufacturing process. All these values can vary slightly depending on how much cold working was done during the manufacturing process before final product delivery, so always check with your supplier for exact values before proceeding with any project involving Red Brass UNS C23000 use.

Properties Metric Imperial
Tensile strength 269-724 MPa 39-105 ksi
Yield strength 69-434 MPa 10-70 ksi
Elongation 55% 55%
Poisson’s ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi

Red Brass Physical Properties

Red Brass UNS C23000 has a melting point range of 1900°F – 2000°F or 1038°C – 1093°C depending on the exact composition of each particular batch produced by different suppliers, but generally speaking, they all stay within this temperature range; it also has an electrical conductivity rating between 16% IACS – 25% IACS at 68°F or 20°C room temperature. Finally, this material’s thermal conductivity rating is around 185 BTU/hr/ft²/ft/°F or 100 W/mK at 68°F or 20°C room temperature.

Properties Metric Imperial
Melting point-liquidus 1027°C 1880°F
Melting point-solidus 988°C 1810°F
Density (@20°C/68°F) 8.75 gm/cm3 0.316 lb/in3

Red Brass Equivalents

ASME B16.22 ASTM B134 ASTM B687 ASTM B111
ASME B16.29 ASTM B135 ASTM B698 ASME SB543
ASME SB111 ASTM B359 MIL T-20168 ASTM B587

Red Brass Specifications

End Product Specification
Red Brass Bar ASTM B36
Red Brass Fittings ASME B16.29, B16.22
Red Brass Nipples ASTM B687
Red Brass Pipe ASME SB43, ASTM B698, B43
Red Brass Plate ASTM B36
Red Brass Sheet ASTM B36, SAE J461, J463
Red Brass Strip ASTM B888, B36, SAE J463, J461
Red Brass Tube ASTM B569, B698
Red Brass Tube, Red Brass Condenser ASME SB111, ASTM B111
Red Brass Tube, Red Brass Finned ASME SB359, ASTM B359
Red Brass Tube, Red Brass Seamless AMS 4553, ASME SB135, ASTM B135, FEDERAL WW-T-791, MILITARY MIL-T-20168, SAE J461, J463
Red Brass Tube, Red Brass U-Bend ASME SB395, ASTM B395
Red Brass Tube, Red Brass Welded ASME SB543, ASTM B587, B543
Red Brass Wire ASTM B134

UNS C23000 Uses

The Red Brass C23000 is an alloy of copper and Zinc that has recently gained popularity due to its remarkable versatility. It can be used for various applications, from decorative ornamental pieces to fittings, fixtures, valves and electrical components. The alloy provides great corrosion resistance, strength, and longevity under stressful environments. It also offers great machinability and weldability, making it an ideal choice for forming many objects. Its colour is stable as it does not require re-plating or tarnishing over time. Its non-toxic properties make it safe for use with food consumable items making it a prime option for manufacturing kitchen equipment, utensils and machinery parts in the food industry. It can also be used in the medical industry, where its lack of reactivity is crucial in the production of medical instruments.

Corrosion Resistance

Red brass, also known as UNS C23000, is sought for its corrosion resistance in various environments. It is used to manufacture levers, fittings and pipe components due to its superior strength and ductility when used in hot water piping systems. This protection from causes such as rusting surpasses other metals and alloys, allowing users to trust in the material’s lifespan when dealing with high-corrosion potential settings. Customers turn to this grade of brass for quality performance that meets their needs and creates long-lasting solutions.

Heat Resistance

Red Brass (UNS C23000) is a copper alloy known for its great heat resistances, making it suitable for interior and exterior settings. With outstanding workability and durability, Red Brass is highly sought after as it can withstand extreme temperatures up to 1000 degrees Fahrenheit. Even at high temperatures, it remains non-magnetic and keeps its physical properties intact. It is also corrosion-resistant due to its composition’s presence of Zinc and lead. Another advantage of Red Brass is its long lifespan, even when exposed to the harsh environments associated with extreme heat. Its versatility across many industries makes it a precious option for applications that require tight tolerances, such as medical instruments or heavy machinery components.

Heat Treatment

Heat treatment is important when working with red brass, UNS C23000. This versatile metal alloy is used in many applications, so controlling the properties for these uses requires precise heat treatment. When exposed to temperatures between 945-1000° C, this alloy will become softer and more malleable, allowing for easier shaping and machining. However, more extreme conditions are needed for strength and hardening; the ultimate tensile strength of UNS C23000 can be increased by subjecting it to heat treatments, further increasing the temperature to anywhere from 1000-1150°C. With the correct heat treatment, the mechanical properties of red brass, such as hardness, tensile strength and fatigue resistance, can all be altered.


Working with Red Brass UNS C23000 requires utmost precision and care. With the right tools and knowledge, machining this special material can create intricate designs and components with its unique properties. The tough malleability of the Red Brass UNS C23000 helps it to form complex parts as it has superior ductility to other materials. The rigidity of the material makes it suitable for use in areas with good corrosion resistance. Practical applications will benefit from having components machined from this unique metal alloy, as they can last a long time.


Welding with red brass (UNS C23000) can be tricky for those unfamiliar with brazing high copper alloys. This type of brass is highly ductile, making forming and joining difficult without the right tools and techniques. It’s important to use careful, slow heating processes when welding UNS C23000 to minimize cracking and oxidation. The addition of fluxes during this process helps prevent any oxidization from occurring that could weaken the weld bond. Red brass welding requires more care and skill than other methods. However, working with this material allows for greater reliability because it strips away the impurities while significantly increasing strength and resistance.


As we have seen here today in our blog post discussing Red Brass UNS C23000 – there are many valuable applications for this material in the aerospace industry, automotive industry, plumbing industry etc., due to its excellent combination of mechanical, chemical & physical properties. Its composition consists primarily of Copper, Zinc, Lead, Tin & Iron, along with small traces from other elements like Arsenic & Phosphorus giving it great corrosion resistance & high machinability as well as good heat resistance after proper heat treatment processes have been applied. With all these features combined, you can be sure that Red Brass UNS C23520 will provide you with a reliable performance under most scenarios you might encounter while designing your projects!

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