ThePipingMart Blog Grades 642 Bronze (C64200) – Composition, Properties, and Uses

642 Bronze (C64200) – Composition, Properties, and Uses

Bronze 642

The term “bronze” encompasses a range of alloys made from copper and other metals, such as tin, zinc, aluminum, or silicon. One particular alloy that is widely used for its strength and durability is known as Bronze 642. This article will provide an overview of this alloy’s composition, chemical properties, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment, machining, and welding.

What Forms is Bronze 642 Available at Piping Mart?

  • Bronze 642 Bars
  • Bronze 642 Bolts
  • Bronze 642 Pipes
  • Bronze 642 Screw
  • Bronze 642 Tubing
  • Bronze 642 Valves
  • Bronze 642 Washers
  • Bronze 642 Flanges
  • Bronze 642 Fasteners
  • Bronze 642 Electrodes

642 Bronze Composition

C64200 is an alloy made up of 88% copper and 12% tin. It also contains other elements, such as aluminum or silicon which are added in very small amounts to enhance certain characteristics.

Min/Max 6.3 – 7.6 0.15 Rem 0.3 0.05 0.1 0.25 1.5 – 2.2 0.2 0.5
Nominals 7.0000 91.2000 1.8000

642 Bronze Chemical Properties

As a copper-based alloy, C64200 has excellent corrosion resistance when exposed to water or salt water environments. Its high copper content also makes it highly resistant to wear and tear from wear particles in its environment.

642 Bronze Mechanical Properties

With its high tensile strength and low thermal expansion rate, Bronze 642 can hold up under heavy loads over long periods of time without deforming or breaking down. It also has good fatigue strength, making it suitable for use in applications that experience high levels of vibration or shock loading levels.

Form Size Range Yield 0.2% UTS Elong % Hardness (HB)
Imperial Metric Ksi MPa Ksi MPa % (HB)
HR50 >2-3” >50-80mm 35-37 240-255 75-90 515-620 15-35 120-150
HR50 >3-4” >80-100mm 30-35 205-241 70-80 485-551 15-40 120-150
M10 >4” >100mm 25-40 170-276 70-80 485-551 15-40 120-150

642 Bronze Physical Properties

The density of C64200 Bronze 642 is 8.89 g/cm3, which makes it slightly heavier than steel but still light enough for many applications where weight is a factor. It also has a melting point of 875°C (1627°F) which means that it can be melted down and cast into different shapes if needed.

Coefficient of Thermal Expansion 10.0 . 10-6 per oF (68-572 F) 18.0 . 10-6 per oC (20-300 C)
Density 0.278 lb/in3 at 68 F 7.7 gm/cm3 @ 20 C
Electrical Conductivity 8 %IACS @ 68 F 0.047 MegaSiemens/cm @ 20 C
Electrical Resistivity 113.0 ohms-cmil/ft @ 68 F 18.79 microhm-cm @ 20 C
Melting Point – Liquidus 1840 F 1004 C
Melting Point – Solidus 1800 F 982 C
Modulas of Elasticity in Tension 16000 ksi 110000 MPa
Modulus of Rigidity 6000 ksi 41370 MPa
Specific Gravity 7.69 7.69
Specific Heat Capacity 0.09 Btu/lb/ . oF at 68F 377.1 J/kg . oK at 293 K
Thermal Conductivity 26.0 Btu . ft/(hr . ft2 . oF)at 68F 45.0 W/m . oK at 20 C

C64200 Equivalent


Bronze 642 Specifications

  • ASME SB150
  • ASME SB283
  • AMS 4631
  • AMS 4634
  • ASTM B124
  • ASTM B150
  • ASTM B283
  • QQ-B-465
  • SAE J461
  • SAE J463

Bronze 642 Uses

Due to its excellent wear and corrosion resistance characteristics, high tensile strength, and fatigue resistance properties, Brass C64200 is often used in applications such as bearings and bushings where these qualities are beneficial. It can also be used in marine applications due to its inherent corrosion resistance when exposed to salt water environments and its ability to withstand the high temperatures experienced in engines operating at full speed under load conditions.

  • Bronze 642 is an alloy that is made up of 90% copper and 10% tin.
  • It is a very strong and durable metal that is resistant to corrosion.
  • It is often used in the construction of buildings and bridges because of its strength.
  • It is also used in the production of coins, medals, and other objects that need to be durable.
  • Bronze 642 can also be used for sculpture and other art forms because it can be cast into any shape.
  • It is also used in producing musical instruments, such as cymbals and bells.
  • Bronze 642 is also used in the production of bearings and gears because of its resistance to wear and tear.
  • It is also used in the production of electrical components because it is an excellent conductor of electricity.
  • Bronze 642 can also be used in jewelry production because it is a beautiful golden color.
  • Bronze 642 is also used in the production of plumbing fixtures because it is resistant to corrosion

Corrosion Resistance

As mentioned above, Alloy C64200 has excellent corrosion resistance when exposed to water or salt water environments, making it suitable for marine applications where exposure to corrosive elements could occur regularly. In addition to this, it also has good abrasion resistance, which makes it ideal for use in parts that come into contact with abrasive materials during operation, such as bearings or bushings that move against other surfaces during their operation cycle.

Heat Resistance

The melting point of 875°C (1627°F) makes Bronze 642 capable of withstanding higher temperatures than some other alloys without deforming or losing structural integrity over time due to extreme heat cycles experienced during operation at full speed under load conditions. This makes it ideal for use in engines operating at higher speeds over prolonged periods without requiring frequent replacement due to excessive heat damage caused by prolonged exposure at elevated temperatures over extended periods.

Heat Treatment

Heat treatment processes such as annealing can be performed on Bronze 642 in order to improve its strength and hardness while maintaining good ductility for improved performance when subjected to heavy loads during operation cycles over long periods of time without experiencing premature failure from fatigue due to extended operation cycles under load conditions.


Due to its relatively low melting point compared with other metals, bronze can easily be machined using standard tools available today, making it suitable for many fabrication processes such as drilling, tapping, turning, milling, etc.


Additionally, bronze can easily be welded using TIG MIG gas welding techniques depending on the application required, allowing greater versatility when creating custom components not available off-the-shelf.


In conclusion, Alloy 642 provides excellent wear abrasion, corrosion fatigue & impact resistance combined with superior tensile strength & low thermal expansion rate, making it ideal for many types of industrial applications where these qualities are beneficial, including marine engine parts bearings bushings, etc. Furthermore, its relatively low melting point compared with other metals allows easy machining & welding using standard tools & techniques available today, providing further versatility when creating custom components not available off-the-shelf… If you require more information about this alloy, please do not hesitate to contact us here at Metric Marketing today!

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