ThePipingMart Blog Grades C715 Copper (C71500) – Composition, Properties, and Uses

C715 Copper (C71500) – Composition, Properties, and Uses

Copper C715

C71500 is a copper alloy with high chromium, nickel, and molybdenum levels. It is known for its strong mechanical properties and corrosion resistance, making it a popular choice for many engineering applications. In this blog post, we will take an in-depth look at the composition, chemical properties, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment, machining, and welding of Copper C715.

C715 Copper Chemical Composition

The alloy contains 63% copper,45% nickel, .50% molybdenum, and other trace elements such as manganese and iron. The presence of these elements gives the alloy its unique characteristics.

Nominal Minimum Maximum
Copper 69.5
Lead .05
Iron .5 .40 .7
Zinc 1.0
Nickel 30.0 29.0 33.0
Manganese 1.0
Copper plus elements with Specific Limits 99.5

C715 Copper Chemical Properties

A major advantage of using C71500 is that it has outstanding electrical and thermal conductivity. This makes it ideal for applications with high electrical or thermal conductivity levels, such as in electrical connectors or cooling systems. Additionally, the alloy is highly resistant to chloride ion stress corrosion cracking, making it suitable for seawater systems.

C715 Copper Mechanical Properties

The alloy has a tensile strength range between 220-310MPa with an elongation range between 10-20%. This makes it excellent for applications where strength and ductility are required, such as structural components or fasteners. Additionally, it has good fatigue strength, making it suitable for dynamic loading applications such as valves or pumps. Lastly, its low thermal expansion rate makes it suitable for precision machining operations where tight tolerances are required.

Size Section in. Temper Tensile Strength ksi Yield Strength Elongation in 2” % Rockwell Hardness Shear Stength ksi Fatigue Strength
(.5% Ext. Under Load) ksi (.2% Offset) ksi F B 30T ksi Million Cycles
Flat Products
1.0 in As Hot Rolled 55.0 20.0 45 35
1.0 in. OD x .065 in. .025 mm 60.0 25.0 45 80 45
4.5 in. OD x .109 in. .035 mm 54.0 45 77 36
1.0 in. Half Hard (20%) 75.0 70.0 15 80

C715 Copper Physical Properties

C71500 is nonmagnetic, which can be advantageous in applications such as medical imaging equipment or electromagnetic shielding. Additionally, the alloy has a low coefficient of friction, making it suitable for bearing surfaces that require low friction operation over long periods without jeopardizing wear resistance performance. Lastly, the alloy has good formability characteristics making it ideal for fabrication operations such as stamping or forging that require good formability.

English Units C.G.S. Units
Melting Point (Liquidus) 2,260°F 1,240°C
Melting Point (Solidus) 2,140°F 1,170°C
Density .323 lb./cu. in. @ 68°F .894 gm./cu. cm @ 20°C
Specific Gravity 8.94 8.94
Coefficient of Thermal Expansion per °F from 68°F to 212°F per °C from 20°C to 100°C
Coefficient of Thermal Expansion per °F from 68°F to 392°F per °C from 20°C to 200°C
Coefficient of Thermal Expansion .0000090 per °F from 68°F to 572°F .0000162 per °C from 20°C to 300°C
Thermal Conductivity 17 Btu./sq. ft./ft./hr./°F @ 68°F .07 cal./sq. cm/cm/sec./°C @ 20°C
Electrical Resistivity (Annealed) 225 Ohms (circ. mil./ft.) @ 68°F 37.5 Microhm-cm @ 20°C
Electrical Conductivity* (Annealed) 4.6% IACS @ 68°F .0267 Megohm-cm @ 20°C
Thermal Capacity (Specific Heat) .09 Btu./lb./°F @ 68°F .09 cal./gm./°C @ 20°C
Modulus of Elasticity (Tension) 22,000,000 psi 15,500 Kg./sq. mm
Modulus of Rigidity 8,300,000 psi 5,800 Kg./sq. mm

C715 Copper Equivalent

  • ASTM B466
  • ASME SB466
  • MIL-T-16420

C715 Copper Uses

C71500 is a metal alloy used for many applications. It combines superior corrosion resistance and strength, making it a great choice for manufacturing industries. DUE TO ITS HIGH WEAR RESISTANCE, Copper C715 has been used to manufacture automotive components such as brake pads, steering bowls, and engine blocks. In addition, it is widely used in the chemical industry for valve bodies and pumps to resist corrosion from harsh chemicals. Additionally, this material can be used in other applications, such as in electrical equipment, structural components and farming tools, because of its superior mechanical properties. With so much versatility, Copper C715 is an excellent option when selecting materials for various manufacturing uses and applications.

Corrosion Resistance

Copper alloy C715 is an excellent material for areas of high corrosion risk due to its remarkable ability to withstand oxidation and the forces of nature, even in extreme weather conditions. Not only does it boast excellent mechanical properties, but it also displays superior corrosion resistance – making it a particularly popular choice in the construction industry. The alloy is highly malleable and ductile and can easily be machined into complex shapes, making it perfect for long-term use in any environment. Its superior corrosion resistance qualities are especially beneficial in areas where exposure to sea air or acid rain could cause rusting problems or other related damages. Copper alloy C715 is a reliable and durable material that sets itself apart from the rest when it comes to corrosion resistance.

Heat Resistance

The Copper C715 is a superior heat resistance alloy commonly used in applications requiring high performance. Its versatile chemistry and mechanical properties show it to be an ideal metal for working at extreme temperatures without the risk of deformation or breakage. This metal can withstand temperatures up to 450°C and provide consistent corrosion resistance even in harsh environments. Customers have successfully used the Copper C715 to achieve superior performance when welding, casting, extruding and forging metal parts. Its features offer customers optimal value for their production process, resulting in higher quality products with remarkable strength and durability.

Heat Treatment

Heat treatment of Copper C715 is a process that can be used to attain excellent benefits for many applications. This metal alloy, consisting mostly of copper and zinc, is malleable and strong when its properties are enhanced through proper heat treatments. Due to the material’s ductility, it is easy to shape into finished products without risking damage to the surface or overall integrity. With various annealing and tempering techniques available, the malleability and strength crafted into each piece will depend entirely on the application. By adhering to specified parameters during heat treatment processes, designers can capitalize on the unique advantages Copper C715 has to offer.


Copper C715 machining is an important part of precision manufacturing, as it allows for careful manipulation to create intricate details and components out of this strong yet malleable material. Machinists often utilize the broad range of achievable shapes during their work with the Copper C715 alloy, controlling thermal exposure and feeding speeds to craft difficult designs with high levels of accuracy. This machining process is often employed in various industries due to its cost-effectiveness and versatility, with custom products created with tight tolerances for commercial and private clients. Copper C715 machining is an invaluable service that opens up many possibilities for production requirements.


Copper C715 welding is a reliable and efficient way to join copper plumbing, pipe fittings, and other materials made of copper. This process, also known as TIG (Tungsten Inert Gas) welding, involves heat being applied to two pieces of copper held together. Doing so creates an intertwined arrangement of the metals that makes them nearly inseparable. C715 copper is especially credited for its high conductivity, malleability, and corrosion resistance. Experienced professionals often prefer it because of its easy workability and weld reliability despite thick layers of corrosion coating the surfaces. Copper C715 welding stands out as one of the most cost-effective and aesthetically pleasing methods to join copper parts with each other.


Copper C715 is a versatile copper alloy with excellent mechanical properties, good corrosion resistance, and electrical/thermal conductivity. Its wide physical properties make it suitable for various engineering applications ranging from medical devices to aerospace components. With its combination of strength, toughness, formability, low friction, low thermal expansion rate, and excellent corrosion resistance, Copper C715 is an ideal choice when searching for alloys that offer superior performance in critical service conditions. Therefore engineers, technicians & scientists should consider using Copper C715 to optimize their designs while maintaining stringent performance requirements across a wide range of operating temperature & pressure scenarios.

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