Leave Your Message
Custom sintered and CNC-machined tungsten counterweights, ballistic damping components, and specialized radiation shielding blocks meeting rigorous South Korean industrial and safety specifications.
From Gyeonggi semiconductor wafer handlers to Ulsan offshore propulsion and Hanwha-level defense avionics, compact mass solutions govern high-tech competitiveness.
South Korea's high-tech manufacturing spine—spanning Suwon, Giheung, Pyeongtaek, and Icheon—relies extensively on vacuum-compatible, non-magnetic tungsten counterweights to eliminate vibration in sub-nanometer lithography wafer handling arms and collaborative robots (cobots).
As the K-Defense industry accelerates exports, flight surface counterweights, dynamic rotor balancers, and missile gyro compensators demand ASTM B777 Class 3 and Class 4 tungsten alloys, replacing outdated hazardous lead blocks with environmentally compliant mass.
Seoul's leading university hospitals (Samsung Medical Center, Asan Medical Center) and medical device R&D centers incorporate multi-leaf collimators (MLC) and heavy tungsten gamma camera shielding counterweights designed for zero radiation leakage.
The transition toward electrification, automation, and aerospace miniaturization across the Republic of Korea has dramatically boosted demand for high-density tungsten heavy alloys (WHA). Unlike conventional metals such as structural carbon steel (density ~7.85 g/cm³) or cast lead (density ~11.34 g/cm³), tungsten heavy alloys offer a density range between 17.0 g/cm³ and 18.5 g/cm³—over 60% denser than lead and more than double that of iron. In the dense physical architectures of modern Korean electronics, electric vehicle (EV) drive motors, and precision robotics, volume is the most constrained physical parameter. Squeezing maximum gravitational mass into tight spatial envelopes without compromising mechanical strength or environmental safety is precisely what tungsten alloy counterweights accomplish.
Furthermore, South Korea's strict adherence to occupational safety standards (KOSHA) and international RoHS/REACH environmental directives has catalyzed a decisive retreat from lead-based ballast weights in maritime vessels, consumer sport equipment, and industrial automation equipment. Sintered Tungsten-Nickel-Iron (W-Ni-Fe) and Tungsten-Nickel-Copper (W-Ni-Cu) compounds offer a non-toxic, corrosion-resistant, and high-tensile alternative that complies fully with modern Korean environmental governance.
Direct factory supply costs based on standard sintering, CNC tolerances (±0.01mm to ±0.005mm), and delivered CIF Incheon/Busan Port or air courier express.
| ASTM / International Grade | Nominal Composition | Density Range (g/cm³) | Tensile Strength (MPa) | Est. Price (USD / kg) | Est. Price (KRW / kg CIF Busan) | Primary Korean Application Focus |
|---|---|---|---|---|---|---|
| Class 1 (90W) | 90% W, 7% Ni, 3% Fe | 17.00 ± 0.15 | ≥ 850 | $52.00 - $68.00 | ₩71,000 - ₩93,000 | Crankshaft balancing, marine stabilizers, sporting equipment |
| Class 2 (92.5W) | 92.5% W, 5.25% Ni, 2.25% Fe | 17.50 ± 0.15 | ≥ 900 | $56.00 - $74.00 | ₩76,000 - ₩101,000 | Robotic arm counterbalances, automotive drivetrain dampers |
| Class 3 (95W) | 95% W, 3.5% Ni, 1.5% Fe | 18.00 ± 0.15 | ≥ 920 | $62.00 - $85.00 | ₩84,000 - ₩116,000 | Aerospace flight controls, radar pedestals, gyroscopes |
| Class 4 (97W) | 97% W, 2.1% Ni, 0.9% Fe | 18.50 ± 0.15 | ≥ 880 | $70.00 - $98.00 | ₩95,000 - ₩134,000 | High-energy collimator shielding, defense kinetic balancers |
| Non-Magnetic (W-Ni-Cu) | 90-95% W, Ni, Cu balance | 17.00 - 18.00 | ≥ 650 | $65.00 - $92.00 | ₩88,000 - ₩125,000 | Semiconductor ion implantation, MRI scanner balancing |
Raw material purity (ammonium paratungstate APT market indices), sintered blank size versus finished machined envelope, micro-machining tolerances, surface passivation (electroless nickel plating to survive humid coastal shipyards in Ulsan and Busan), and required non-destructive testing (ultrasonic testing for internal voids).
While standard rough-sintered blocks or simple cylindrical rods carry the baseline pricing shown above, complex geometry counterweights incorporating counterbored holes, internal threads, or radius chamfers for Korean robotics integration will adjust machining labor rates minimally when produced in batch quantities (>200 kg).
Engineered via liquid-phase sintering to deliver extreme density, crack resistance, and vibration attenuation under harsh operating environments.
Pure tungsten features an exceptionally high melting point of 3422°C, making conventional casting processes impractical. Our counterweights are manufactured through advanced liquid-phase powder metallurgy sintering. Ultra-fine refractory tungsten powder is uniformly blended with transition binder powders—principally Nickel, Iron, or Copper. Under high-temperature hydrogen or vacuum sintering furnaces (1450°C to 1550°C), the binder matrix melts and dissolves a portion of the tungsten grains, yielding a two-phase composite of spherical tungsten crystallites held within a ductile intermetallic binder. This microstructure guarantees both extreme density and superior elongation (up to 15–20% in annealed condition), preventing brittle fracture when exposed to dynamic shock loadings in Korean industrial equipment.
In high-speed rotational mechanics—such as electric turbochargers produced for Hyundai/Kia tier-one automotive programs or machine tool spindles engineered in Changwon—vibration creates resonant failure. Tungsten heavy alloy displays a significantly higher modulus of elasticity (Young's Modulus: 360–380 GPa) than steel (210 GPa). Combined with high internal friction characteristics, tungsten counterweights attenuate kinetic chatter and mechanical noise far more efficiently than lead, bronze, or standard carbon alloys, substantially extending bearing operational lifespans.
For semiconductor fab robotics operating within magnetic-field-sensitive cleanrooms (e.g., electron beam lithography, vacuum ion tracks in Giheung and Pyeongtaek), standard ferromagnetic steel or W-Ni-Fe alloys can introduce electromagnetic distortion. By utilizing Copper in place of Iron (W-Ni-Cu formulation), we deliver completely non-magnetic tungsten counterweights with magnetic permeability μ < 1.05, preventing particle contamination and trajectory disturbance in sensitive chipmaking chambers.
Strategic geographic location, world-class academic powder metallurgy partnerships, and proven industrial quality standards serving global and Korean partners.
We own a research and development group leaded by materials science professor, senior engineer, and we keep close communication and cooperation with relevant academy of Central South University, which ensure our tungsten alloy products are in leading level in national even in international. Our coastal Tianjin hub provides seamless 48-hour container freight routes directly to Incheon, Pyeongtaek, and Busan ports.
Quality first, all staff participation, sincere service, customer-orientation is the working criterion we always adhere to and while achieving the best to meet customers' need or over the customer's expectation is the greatest happiness to all staffs.
We will provide best price and best service with best quality products for you, so we really expect sincere cooperation between both of us in the coming future! Comprehensive Mill Test Certificates (MTC) according to EN 10204 3.1 accompany every single Korean delivery.
How custom-machined tungsten counterweights power critical mechanisms across the Korean peninsula.
In high-speed electronics assembly plants across Incheon and Suwon, robotic arms must articulate millions of cycles without motor overheating. High-density tungsten alloy cylinders are strategically installed in elbow and shoulder joints to balance payload torque, reducing servo strain by up to 34%.
Shipyards in Geoje, Ulsan, and Mokpo constructing dual-fuel eco-vessels utilize compact tungsten segments embedded directly into high-output crankshaft webs to cancel second-order reciprocating inertial forces where conventional forged steel counterweights cannot fit.
South Korea's aerospace sector (KAI, Hanwha Aerospace) requires reaction wheel rims and momentum control gyro masses with uniform material density and zero micro-porosity to maintain ultra-precise satellite attitude control in orbit.
Our active presence at prominent manufacturing, advanced materials, and defense expos across Asia, Europe, and global trade summits.
Manufactured to international ASTM B777 standards with complete customization available for Korean OEMs, machine tool integrators, and laboratories.
Fast, direct logistical transit from Tianjin Seaport and Capital Airport to South Korean Free Economic Zones and major production bases.
Importing tungsten heavy alloy components into South Korea from our Tianjin factory provides unmatched logistical and tariff advantages. Operating under the China-Korea Free Trade Agreement (CKFTA), qualifying tungsten products benefit from preferential tariff scheduling when accompanied by a valid Form FTA (Certificate of Origin). In addition, our shipping department regularly arranges weekly vessel sailings reaching Incheon Port in 36 to 48 hours, and Busan Port in approximately 3 to 4 days, providing rapid inventory replenishment for high-velocity Korean assembly lines.
For urgent prototype iterations, small-batch engineering samples, or medical collimator spares, our team arranges express door-to-door air freight to Incheon International Airport (ICN) with complete Korean customs broker coordination within 48 to 72 hours.
We employ high-tonnage cold isostatic pressing (CIP) followed by computer-controlled hydrogen atmosphere liquid-phase sintering. Every manufacturing batch is tested for density according to the Archimedes water displacement principle and checked via ultrasonic non-destructive testing (NDT) to ensure absolute internal soundness prior to CNC machining.
Yes. We manufacture customized W-Ni-Cu (Tungsten-Nickel-Copper) alloys specifically formulated for cleanroom lithography, ion-beam apparatus, and MRI applications where magnetic permeability must remain strictly below μ ≤ 1.05.
While tungsten heavy alloys inherently resist atmospheric corrosion significantly better than carbon steel, we provide optional surface treatments including electroless nickel plating (ENP), chromate passivation, physical vapor deposition (PVD), and black oxide coatings to withstand salt-spray conditions in coastal shipyard hubs like Busan and Ulsan.
We support fast R&D prototype batches with an MOQ as low as 5 to 10 kg for custom-machined samples. Standard prototype lead time is 7 to 12 working days, followed by full volume mass-production dispatch within 20 to 25 days depending on component geometry and required tooling.