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High-performance tungsten heavy alloy plates and components tailored for precise crankshaft balancing and automotive dampening.
In the highly competitive automotive manufacturing landscape, optimizing engine performance, reducing noise, vibration, and harshness (NVH), and improving fuel efficiency are paramount. As internal combustion engines downsize and run at higher compression ratios, and as electric powertrains demand precise mass distribution, the necessity for high-efficiency balancing materials has never been more critical. Tungsten Heavy Alloys (WHA) sheets have emerged as the gold standard for automotive counterweights and crankshaft balancing.
Tungsten heavy alloys typically exhibit densities ranging from 17.0 to 18.5 g/cm³, which is approximately 60% denser than lead and more than twice as dense as steel or cast iron. In automotive engineering, space is a premium commodity. By utilizing tungsten heavy alloy sheets and weights, engineers can concentrate significant mass into extremely tight spaces. This is particularly crucial for crankshaft counterweights, where clearance within the crankcase is limited by the path of the connecting rods and pistons.
Concentrating mass further from the axis of rotation maximizes the moment of inertia while minimizing the physical volume of the counterweight. This leads to lighter, more compact engine designs that can rev faster and operate with reduced mechanical stress.
WHA offers excellent tensile strength, high elastic modulus, and exceptional thermal stability. These properties ensure that counterweights do not deform or shift under extreme centrifugal forces and thermal loads experienced at high engine RPMs.
Unlike lead, which poses severe environmental and health risks during manufacturing and disposal, tungsten is non-toxic and environmentally friendly, aligning with global green manufacturing regulations in the automotive industry.
The crankshaft is the backbone of the internal combustion engine, converting the linear motion of the pistons into rotational energy. Perfect dynamic balance is critical to prevent destructive vibrations that can lead to bearing failure, engine block fatigue, and loss of power. During the engine tuning or manufacturing process, crankshafts are dynamically balanced on specialized machines. If the crankshaft is too light in specific areas, heavy metal weights—most commonly tungsten alloy cylinders or sheets—are inserted or welded into the counterweights.
In high-performance racing, such as Formula 1, NASCAR, and drag racing, engines run at speeds exceeding 10,000 RPM. At these velocities, even a minor imbalance can generate catastrophic forces. Tungsten heavy alloy sheets are precision-machined to fit the exact contours of the crankshaft webs. Because of their high density, they allow engine builders to fine-tune the center of gravity of the rotating assembly with surgical precision, reducing parasitic power losses and ensuring engine survival under extreme conditions.
Beyond the engine bay, the global shift toward electric vehicles (EVs) has introduced new challenges in weight distribution. EVs carry heavy battery packs that dictate the vehicle's center of gravity. To optimize handling, traction, and safety, manufacturers use tungsten heavy alloy sheets as ballast weights. By strategically placing these high-density plates low in the chassis, engineers can achieve a perfect 50/50 front-to-rear weight distribution, significantly improving cornering stability and reducing body roll.
Established in 2001, Zhuzhou Jiuding Metal Technology Co., Ltd is a professional joint venture company which engages in manufacturing, machining and sales of tungsten heavy alloy, tungsten copper, cemented carbide, pure tungsten and other relevant tungsten alloy products. Our products mainly include tungsten heavy alloy, tungsten carbide, tungsten alloy fishing sinker, tungsten darts, tungsten Alloy swaging rod, bucking bar, copper tungsten electrode, tungsten alloy bullets, tungsten alloy syringe, tungsten alloy shielding vial, tungsten alloy boring bar, etc.
Due to its characteristics of high density, high hardness, high melting point, anti-corrosion, radiation protection, non-toxic and environmental-friendly, therefore, our Fragmentation is a natural under the action of detonation products, the shell expansion, fracture broken is made of such warheads is characterized not only as a container shell to form another anti-elements, fragments the size of the shell is uneven, irregular shape in the air fast decay in flight speed, so that the effective anti-personnel grenade limited in scope.
With strong funding, advanced manufacturing technology, strict quality control and technical support from national famous universities, our products are highly popular in countries like America, Canada, and Japan. We possess international advanced technology of Metal Injection Molding (MIM) and pressing technology, enabling us to manufacture standard products as well as various non-standard, custom-engineered components to meet precise customer requirements.
Leveraging advanced manufacturing processes and military-grade precision to deliver superior tungsten alloy products for industrial applications.
Pre-control use of shell fragments groove, groove or increase the lining of explosives and other technical measures to make the shell partial reduction of the intensity to control the explosion of the broken parts to form fragments. Such warheads are characterized by the formation of fragment size of the uniform, shape the ground rules.
Prefabricated fragments forming a pre-processing will be the shape and quality of pre-designed steel ball, steel arrows, tungsten ball, tungsten and other prefabricated column fragments produced prefabricated sets of body fragments, and installed in the grenade projectile outer surface or inner surface. These prefabricated projectile fragmentation grenade explosion with the formation of fragments together constitute the natural fragmentation field, due to resistance of prefabricated fragments flying characteristic consistency, with prefabricated fragments of the grenade will be set within the framework of the lethal effect of a relatively dense, full-bombs a greater degree of lethality increase.
Because there is a prefabricated fragments will affect the negative effects of missile body structures, usually only in low-pressure chamber which uses artillery and ammunition, such as the forced large-caliber bullets and grenades. Applications also are the most common aircraft shells, grenades, mines and so on. The current high chamber pressure prefabricated artillery fragments, are used in canister form, such as Switzerland, L70-type 40 mm grenade where overhead is filled with tungsten carbide ball. Prefabricated fragments technology has been widely used on all types of warheads. Cylindrical fragments (Tungsten column) as a type of prefabricated fragments, due to high density, armor-piercing capability, as air defense, anti-radiation, anti-surface, one of the main anti-elements, and widely used.
Tungsten alloy products are widely used in fields of aerospace, medical equipments, military, mechano-electronic, oil exploration, vehicle, sports counterweight, gold-plated jewelry etc. With strong funding, advanced manufacturing technology, strict quality control and technical support from national famous university, our products are popular in country of America, Canada and Japan etc. Besides, we own international advanced technology of Metal Injection Molding (MIM) and pressing technology, we can manufacture standard products and various non-elevation products.
The global automotive market is undergoing a rapid transition toward efficiency, electrification, and sustainability. These market drivers have direct implications for the demand and development of tungsten heavy alloy sheets:
Historically, lead was used for balancing wheels and engine components due to its low cost and relatively high density. However, strict environmental regulations (such as RoHS and REACH in Europe) have banned or severely restricted lead usage. Tungsten has emerged as the premier non-toxic alternative, offering even higher density (19.25 g/cm³ pure, ~18.5 g/cm³ alloyed) and vastly superior mechanical strength, making it the ideal long-term choice for global automotive OEMs.
To meet stringent carbon emission targets, automotive manufacturers have shifted toward smaller, turbocharged engines (e.g., 3-cylinder and 4-cylinder configurations). These engines naturally generate higher secondary vibrations compared to traditional V8 engines. To maintain cabin comfort and prevent premature drivetrain wear, engineers rely on tungsten heavy alloy sheets and balancing weights integrated into balance shafts and crankshaft webs to damp out these vibrations efficiently.
As engine compartments become more compact, the geometry of counterweights has become increasingly complex. Standard rectangular sheets are often insufficient. Using advanced Metal Injection Molding (MIM) and precision CNC machining, Zhuzhou Jiuding Metal Technology produces custom-shaped tungsten parts that fit perfectly into complex engine geometries, reducing assembly time and material waste.
Explore our full range of high-density tungsten heavy alloy products, precision-engineered for automotive, industrial, and defense applications.
