Applications of H68 Brass

On the stage of materials science, H68 brass occupies an important place due to its unique chemical composition. As its name implies, H68 brass has a copper content within the delicate range of 67.0%–70.0%, with the balance being zinc. This carefully calibrated ratio is the cornerstone of its material properties. Copper imparts good electrical and thermal conductivity to H68 brass, enabling it to excel in electrical and heat exchange applications. The addition of zinc, akin to infusing copper with strength, significantly enhances the alloy's tensile strength and hardness, allowing H68 brass to hold its own in various mechanical applications.

Beyond the main actors, copper and zinc, H68 brass contains some trace elements. Although present in extremely small amounts, they play an indispensable role. The lead content is strictly controlled at ≤0.03%, and iron at ≤0.10%. These trace elements are not incidental; they work synergistically like dedicated backstage contributors to further optimize the performance of H68 brass. They not only improve the alloy's corrosion resistance, allowing H68 brass to remain stable in harsh environments, but also enhance its machinability, enabling it to handle both cold and hot working with ease, rightfully earning the title of the "balanced performer" in the industrial field.

Get H68 Brass Spec Sheet

The physical properties of H68 brass are key to its widespread industrial application.

Density: 8.5 g/cm³, placing it in a moderate range among metallic materials, balancing weight and structural strength.

Melting Point: Between 920–940°C, allowing it to maintain good performance under elevated temperatures, suitable for applications like high-temperature heat exchangers.

Electrical Conductivity: 28% IACS. While lower than pure copper, this is an excellent performance among many alloys, making it ideal for electrical terminals, wires, and cables.

Thermal Conductivity: 121 W/(m·K), making it important for heat sinks, heat exchangers, and other devices requiring rapid heat transfer.

Modulus of Elasticity: 105 GPa, indicating a strong resistance to deformation within the elastic range, suitable for springs and elastic components.

These physical property parameters collectively form the performance advantages of H68 brass, enabling it to function stably in complex working conditions involving electrical conduction, heat exchange, and structural support.

(A) Mechanical Properties: The "Perfect Balance of Strength and Toughness" After Forging

Tensile Strength: ≥ 440 MPa, enabling it to withstand significant tensile forces.

Yield Strength: ≥ 250 MPa, allowing it to maintain elastic deformation under force and recover its shape afterward.

Elongation: ≥ 25%, indicating good ductility for shaping into complex forms.

Hardness: 85–105 HV (Vickers), providing wear resistance while remaining machinable.

This perfect combination of high strength and high toughness makes H68 brass excel under alternating or impact loads, serving as a core material for precision mechanical components.

(B) Machinability: The "Versatile Expert" of Industrial Manufacturing

Machinability: Excellent. Its relatively soft texture causes less tool wear, enables precise machining of complex parts, and improves efficiency.

Weldability: Excellent. Suitable for gas welding, brazing, etc., with high joint strength and minimal defects like cracks or porosity.

Formability: Excellent. Can be formed into complex structures through both cold working (drawing, bending, stamping) and hot working (forging).

Heat Treatment: Flexible processes allow for performance adjustment:

Hot working range: 750–830°C (improves microstructure)

Annealing range: 520–650°C (relieves stress, improves plasticity/toughness)

(C) Corrosion Resistance: The "Stable Performer" in Complex Environments

Atmospheric Environments: Forms a dense oxide film for good stability in both dry and humid climates, suitable for outdoor architectural decoration.

Freshwater Environments: Resists corrosion from dissolved oxygen and mild acids/bases, widely used in water pipes, pumps, etc.

Marine Environments: Effectively resists seawater erosion, ideal for ship components, marine platform parts, propellers, etc.

Limitations & Notes:

Prone to stress corrosion cracking in ammonia atmospheres.

Corrosion resistance decreases significantly in strong acid/alkali environments.

Suitable environments and protective measures (e.g., coatings, linings) should be considered.

(A) High-End Industrial Fields

Aerospace: Used for bearings, gears, and other high-strength, corrosion-resistant parts in engines, ensuring performance under extreme conditions.

Marine Engineering: Used for ship valves, pipe fittings, etc., offering long-term stability and corrosion resistance in harsh seawater environments.

Electrical Engineering: The preferred material for terminals and heat exchangers due to its high electrical/thermal conductivity, ensuring efficient power transmission and heat dissipation.

(B) Civilian & Precision Manufacturing

Machinery Manufacturing: Used for wear-resistant, fatigue-resistant transmission parts like gears and bearings in automotive engines and other machinery.

Construction & Decoration: Used for water pipes, faucets, handles, and decorative strips, combining corrosion resistance, machinability, and an aesthetically pleasing golden appearance.

Art & Musical Instruments: Used for sculptures and artworks due to its good plasticity and metallic luster. Its excellent acoustic properties make it suitable for brass instruments like trumpets and trombones.

Get Dedicated Engineer Support

Our factory is equipped with an advanced full-process copper processing production line, specializing in the manufacturing of high-precision copper plates, copper tubes, copper rods, copper wires, and copper strips. The core of our production includes continuous casting and rolling units, precision extrusion lines, high-speed cold rolling equipment, multi-roll precision rolling mills, tube drawing systems, and intelligent stretching production lines. We are also outfitted with comprehensive inspection equipment such as spectrometers and online eddy current flaw detectors, ensuring full-process control from smelting and casting, hot processing, to cold finishing. Our products achieve an accuracy of up to ±0.01mm, with an annual production capacity exceeding 50,000 tons. They are widely used in power, electronics, transportation, and high-end manufacturing sectors. Certified with international standards such as ISO9001 and IATF16949, we are capable of providing global customers with one-stop copper material solutions.

We implement a graded and customized packaging system: copper plates are double-wrapped with moisture-proof paper and vapor corrosion inhibitor film before being placed in reinforced wooden crates, which are filled with cushioning materials and equipped with impact-resistant corner protectors; copper tubes and rods are sealed with plastic end caps, wrapped with PE protective film, and then layered into steel-frame logistics containers, with EPE pearl cotton separating each layer; copper wires are automatically wound onto spools, vacuum-sealed, covered with waterproof film, and secured on customized iron-wood pallets; copper strips are wrapped with non-woven fabric, coiled onto high-strength steel cores, and placed into waterproof composite material coils with desiccants inside. All packaging passes ISTA-3A transport testing, and the outer boxes are labeled with international hazardous material identifiers, moisture warnings, and scannable logistics codes, ensuring the cargo withstands moisture, impact, and chemical erosion during global transportation.

Get Fast Quote & Logistics Plan