ThePipingMart Blog Grades 863 Bronze (C86300) – Composition, Properties, and Uses

863 Bronze (C86300) – Composition, Properties, and Uses

Bronze 863

Bronze 863 is a copper-based alloy containing nickel, tin, and zinc. It provides excellent corrosion resistance and superior mechanical properties, making it an ideal choice for many applications. Let’s take a look at its composition, chemical properties, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment, machining and welding.

863 Bronze Chemical Composition

C86300 contains copper (86%), nickel (3%), zinc (7%), and tin (4%). This alloy has been around since the mid-19th century when it was initially developed for use in steam engine cylinders. Adding nickel increases its strength and wear resistance while adding tin increases its malleability. The combination of these elements makes Bronze 863 an ideal material for various applications requiring strength and durability.

Al 3 – 7.5
Cu 60 – 68
Fe 2 – 4
Pb 0.2 max
Mn 2.5 – 5
Sn 0.2 max
Zn 25

863 Bronze Chemical Properties

The chemical makeup of this alloy makes it resistant to corrosion from a wide range of acids and alkalis. It also has good oxidation resistance up to 1000°F (538°C). In addition to its excellent corrosion resistance properties, C86300 also has high thermal conductivity. Its low electrical resistivity makes it suitable for electrical components and other applications where electrical conductivity is essential.

863 Bronze Mechanical Properties

Due to its composition, this alloy has high tensile strength and good fatigue strength. It also has excellent weldability, allowing it to be easily formed into complex shapes. The mechanical properties make this alloy perfect for applications requiring strong parts, such as aircraft components or automotive engines. These are just some of the advantages that make Bronze 863 so popular in engineering contexts today.

Tensile Strength, min Yield Strength, at .5% Extension Under Load, min Elongation, in 2 in. or 50 mm min Brinell Hardness (3000 kg load) Remarks
ksi MPa ksi MPa % typical BHN
110 758 62 427 14 223

863 Bronze Physical Properties

Bronze 863 is known for its good ductility, which means that it can be bent or shaped without breaking or fracturing easily. This makes it extremely useful for forming intricate shapes like gears or screws without causing damage to the material itself. It also has a very low thermal expansion, which makes it temperature stable over a wide range of temperatures from -300°F (-184°C) up to 500°F (260°C). This stability ensures that parts made from this alloy will remain dimensionally consistent even when subjected to extreme temperatures.

Physical Properties 863
Density 0.283 lb/in3
Ultimate Tensile Strength 110 ksi
Yield Tensile Strength 62 ksi
Shear Modulus 6,100 ksi
Hardness Rockwell | Brinell B97 | 223
Elongation at Break Percentage 14%
Modulus of Elasticity 16,000 ksi
Poisson’s Ratio 0.32
Machinability Percentage 8%
Melting Point 1,630-1,690 °F
Specific Heat 9.0 x 10^-2 BTU/lb-°F
Thermal Conductivity 240 BTU-in/hr-ft^2-°F
Electrical Conductivity 8% IACS

863 Bronze Equivalent

  • AMS 4860
  • ASTM B22
  • ASTM B271
  • ASTM B30
  • ASTM B505
  • ASTM B584
  • ASTM B763
  • MIL C-11866
  • QQ C390
  • QQ C523
  • SAE J461
  • SAE J462

863 Bronze Uses

This versatile alloy can be used in a variety of industries and applications due to its unique combination of characteristics, including corrosion resistance, strength, ductility, low thermal expansion rate, weldability and machinability. Some common uses include marine hardware such as propeller shafts; automotive components such as pistons; industrial valves; bearings; bushings; power transmission equipment; fasteners; connectors; pipe fittings; springs; pump components; medical implants; sculptures and decorative items such as jewellery pieces. The list goes on! As you can see, there is no shortage of ways Bronze 863 can be utilized in various industries today!

Corrosion Resistance

Bronze 863 is a variety of bronzes that have higher corrosion resistance. It can be used in many ways where other types of Bronze have failed, such as parts exposed to harsh chemicals and water or in environments with high levels of humidity. This material also shows significant strength compared to traditional Bronze, making it suitable for parts that will experience wear or high-pressure use. Applications include pumps, electrical equipment and piping hardware, among others. As a result of its excellent corrosion resistance, Bronze 863 is an invaluable material when quality and longevity are necessary.

Heat Resistance

Since antiquity, Bronze has been prized as a metal for its beauty and ability to be smelted and moulded into useful items ranging from jewellery to weaponry. Its popularity has endured due to a combination of its strength and resistance to corrosion, even under severe environments. While many alloys of Bronze will begin to degrade in extreme temperatures, 863-grade Bronze stands out for its superior heat resistance properties. In fact, 863 bronze can withstand temperatures exceeding 900 °F for short durations of time without degrading or otherwise becoming unusable. This makes 863-grade Bronze the ideal material for several high-heat purposes, from those deployed in the manufacturing industries up to the space program or other applications needing to withstand high temperatures. If you need an alloy with superior heat resistance capabilities, then 863 bronze has you covered.

Heat Treatment

Bronze 863 heat treatment is a specialized process that can maximize the benefits of this particular type of Bronze. This metallic alloy is known for its strength and durability, but properly subjecting it to high temperatures allows it to retain these properties while also allowing for better machinability, improved weldability, and greater corrosion resistance compared to other types of Bronze. Heat-treating Bronze 863 requires an exact temperature to be maintained throughout the process and completed in a specialized, controlled environment. With Bronze 863 heat treatment by knowledgeable professionals, this versatile material can take on many forms with reliable performance outcomes.


Bronze is an incredibly versatile material, and its machinability makes it a natural choice for precision applications that require intricate features and superior strength. 863 bronze machining presents a unique set of challenges since this particular alloy is one of the world’s strongest bronze formulations. It provides extremely high yield and ultimate tensile strengths compared to other types of metals, but it cannot be easy to machine properly if not handled correctly. Speciality tools must be used to cut 863 bronze effectively and efficiently, avoiding chipping or tool failure due to the higher temperatures generated during the machining process. By knowing how to make the right adjustments with these materials, machining 863 bronze can become a much more straightforward process while still providing superior products with maximum strength that cannot be matched.


Bronze 863 welding is an innovative process that is quickly gaining popularity throughout the industry. It requires precise temperature control and specific equipment to ensure proper hardness and perfect welds. This new welding technique has revolutionized metalworking, providing those in the industry with a reliable, time-efficient method for joining metal parts together. The results speak for themselves: incredible strength and stability, with no product degradation or rusting. For those looking for a more economical option, this is definitely worth exploring! With such impressive performance and reliability, it’s no wonder that bronze 863 weldings are becoming more widely used today.


Overall, bronze 863 is an ideal choice for many engineering projects due to its superior mechanical properties, excellent corrosion resistance, and low thermal expansion rate, making it an all-around great option for many applications across multiple industries! Whether you’re looking for something strong yet malleable or heat-resistant yet electrically conductive – Bronze 863 could be the perfect solution! With its versatile characteristics, there are endless possibilities when using this remarkable metal alloy!

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