ThePipingMart Blog Grades C651 Low Silicon Bronze(C65100) – Composition, Properties and Uses

C651 Low Silicon Bronze(C65100) – Composition, Properties and Uses

C65100 Low Silicon Bronze

C65100 is a low silicon bronze alloy that has many unique properties, making it an ideal material for a variety of applications. It’s been used in everything from plumbing fixtures to marine components and even in the aerospace industry. UNS C65100, also known as C651 low silicon bronze, is a highly versatile material used in a variety of applications. It is an alloy of copper and silicon, making it incredibly strong, durable, and resistant to wear and corrosion. Its unique composition also enables it to retain its original color and luster over long periods of time. This makes C651 low silicon bronze an excellent choice for architectural accents, artistic creations, and even marine hardware. In addition to its physical properties, C651 low silicon bronze is also easy to work with, providing excellent machinability and weldability. Overall, this material offers a unique combination of strength, durability, and aesthetic appeal, making it a favorite among designers and fabricators in a range of industries. In this blog post, we’ll explore some of the features that make C65100 Low Silicon Bronze so special and why you should consider using it for your next project.

What Forms of C651 Low Silicon Bronze is Available at Piping Mart?

  • Low Silicon Bronze C651 Nuts
  • Low Silicon Bronze C651 Bars
  • Low Silicon Bronze C651 Bolt
  • Low Silicon Bronze C651 Screw
  • Low Silicon Bronze C651 Tubing
  • Low Silicon Bronze C651 Valves
  • Low Silicon Bronze C651 Stud Bolts
  • Low Silicon Bronze C651 Pipe Fittings
  • Low Silicon Bronze C651 Forged Fitting
  • Low Silicon Bronze C651 Instrumentation Fittings

C65100 Composition

Element Content (%)
Zinc, Zn 1.5
Silicon, Si 0.8-2.0
Iron, Fe 0.8
Manganese, Mn 0.7
Lead, Pb 0.05
Copper, Cu Remainder

C65100 Physical Properties

Melting Point – Liquidus°F 1940
Melting Point – Solidus°F 1890
Densitylb/cu in. at 68°F 0.316
Specific Gravity 8.75
Electrical Conductivity% IACS at 68°F 12
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 33
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 9.9
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 17000
Modulus of Rigidityksi 6400

C65100 Mechanical Properties

Temper Thickness Tensile Str. Yield Str. Elong. Rockwell
B C F 30T
OS035 25.4 mm (1 in) 276 MPa (40 ksi) 103 MPa (15 ksi) 50% 55

C65100 Thermal Properties

Treatment Minimum* Maximum*
* Temperature is measured in Fahrenheit.
Annealing 900 1250
Hot Working Temperature 1300 1300

C65100 Equivalent

  • ASME SB315
  • ASME SB98
  • ASTM B105
  • ASTM B315
  • ASTM B432
  • ASTM B96
  • ASTM B98
  • ASTM B99
  • ASTM F467
  • ASTM F468

C65100 Uses

C651 Low Silicon Bronze is known for its superior strength and ductility. It can be used in a variety of applications, including plumbing fixtures, electrical components, marine hardware, and more. Its high corrosion resistance makes it particularly useful in marine applications where the metal will be exposed to salt water or other harsh environments. It can also be used in welding applications because it has good weldability characteristics due to its low silicon content.

C65100 Uses in Industries

  • Automotive Industry
  • Plumbing Industry
  • Electrical Industry
  • Marine Industry
  • Aerospace Industry
  • Construction Industry

C65100 Corrosion Resistance

Due to its inherent corrosion resistance properties, C65100 Low Silicon Bronze is commonly used in seawater applications such as boat hulls or propellers. The alloy is also resistant to sulfur compounds which means it can withstand exposure to sewage or other acidic materials without corroding over time. This makes it an ideal choice for plumbing fixtures or other products that may come into contact with corrosive liquids or gases.

C65100 Heat Treatment and Machining

C65100 Low Silicon Bronze can be heat treated for improved strength and hardness levels if needed for your application. However, because of its low silicon content, machining can be difficult, so care must be taken when doing any cutting operations on this alloy. Speciality tools such as carbide cutters may need to be employed in order to achieve the desired results from machining operations on this material.

C65100 Welding

C65100 Low Silicon Bronze has excellent weldability characteristics thanks to its low silicon content. The alloy can be easily welded using filler metals such as copper-nickel alloys or nickel-copper alloys without any preheating or post-weld heat treatment required. It is also compatible with most welding processes, such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW).


In conclusion, C65100 Low Silicon Bronze is an ideal choice if you are looking for a strong yet ductile metal that offers superior corrosion resistance and weldability characteristics. It’s been used in everything from plumbing fixtures to marine components and even aerospace parts due to its impressive strength-to-weight ratio and wide range of uses. If you have any questions about using this alloy for your next project, please feel free to reach out! We’d love to help you find the perfect solution!

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