Explore our engineering-grade custom steel components processed through verified automated lines and deep machining workshops.
Founded in 2014, JUNLONG Machinery Co., Ltd. is located in the industrial casting hub of Weifang, Shandong, China. Spanning an expansive area of 60,000 square meters, our facility integrates state-of-the-art precision casting technologies with advanced deep-processing machinery.
We operate with an annual production capacity of 20,000 tons of high-grade precision castings and fully machined finished parts. Our material expertise focuses on carbon steel, alloy steel, and stainless steel, ensuring custom components perform flawlessly under high load, high wear, and corrosive environments.
Backed by over 200 dedicated employees, including 30+ specialized engineering technicians, we drive continuous innovation in tool design, metallurgical formulation, and structural optimization.
Advancing construction machinery castings through advanced alloy compositions and simulation modeling.
We synthesize custom alloy chemistries to withstand extreme mechanical degradation. Adding precise percentages of Nickel, Chromium, and Molybdenum maximizes tensile strength while maintaining grain-structure ductility under impact load.
By simulating liquid-metal flow, thermal distribution, and crystallization kinetics prior to pattern creation, we design gating and riser systems that completely prevent structural shrinkage defects, gas pockets, and porosity.
Our machining workshop utilizes multi-axis CNC milling, boring, and turning centers to process raw castings into ready-to-assemble mechanical modules, keeping tolerances tight down to the micrometer level.
Modern earthmoving, mining, and civil construction machinery calls for castings that operate reliably under high working pressures and severe environmental strain. Our metallurgical engineering focuses heavily on microalloying. Using precision elements like Vanadium, Titanium, and Boron allows us to control grain structure refinement. In turn, components feature superior yield strength ratios and crack propagation resistance, preventing catastrophic mechanical failures in active work zones.
In addition, our research roadmap highlights the integration of additive manufacturing (3D printing) for complex sand cores and high-precision wax pattern molds. This hybrid process minimizes lead times for prototyping and enables low-volume, highly complex custom designs that conventional tooling cannot easily duplicate.
Deploying application-specific castings for critical system sub-assemblies.
Excavators, track loaders, graders, and vibratory road rollers depend on wear-resistant castings to carry heavy structural loads. We manufacture custom undercarriage components, track adjusters, boom pivots, swing circles, and high-wear bucket linkage adapters designed to handle extreme shock loads on rough ground.
By integrating strict chemical-composition audits with controlled heat treatments (such as normalizing, quenching, and tempering), we deliver internal microstructures that offer excellent toughness and high fatigue limits.
To ensure reliable process control in every production step, we operate strictly under ISO 9001, IATF 16949, and UL quality management certifications. Every heat of molten metal undergoes spectrometer chemical-composition verification before pouring.
Our testing labs are fully equipped with universal tensile testing machines, Charpy impact testers, Brinell/Rockwell hardness testers, magnetic particle inspection systems (MPI), ultrasonic inspection gear, and coordinate measuring machines (CMM) for geometric tolerance verification.
This absolute process transparency ensures that every casting delivered to international buyers in the United States, Germany, Italy, and Canada is accompanied by fully traceable mill test reports matching EN 10204 3.1 standards.
We perform systematic audits covering chemical makeup, dimensional layout, and structural grain soundness to keep defects near zero.
Combining raw casting production, precision machining, and surface treatment under one roof.
We develop high-precision metallic molds in-house using CNC machining centers. This control ensures dimensional consistency at the casting stage, saving material and machining hours downstream.
Our automated wax pattern creation, slurry coating, and constant-humidity drying lines maintain mold wall consistency. Programmed high-frequency induction melting units ensure clean pours and tight grain structure control.
From shot blasting and sand removal to rust-preventive oil coatings, painting, powder coating, zinc plating, and phosphating. All surface finishes meet stringent ISO anti-corrosion requirements.
By keeping mold production, casting, heat treatment, precise CNC machining, and surface finishes in a single facility, we eliminate multi-party logistics delays and potential quality hand-off errors. Global OEMs benefit from single-point quality tracking, yielding shorter cycle times, highly stable pricing, and lower production risks.
Our infrastructure guarantees manufacturing capability, physical property analysis, and strict geometric control.
Addressing supply chain risks, carbon footprint, and logistics requirements for OEM partnerships.
Global procurement departments look for more than just low-cost parts; they prioritize production stability, structural component lifetime, and legal/regulatory compliance. At JUNLONG, we help buyers minimize procurement risk by focusing on key operational areas:
Submit your CAD/PDF drawings and mechanical specification sheets. Our engineering group will perform a thorough DFM review and return a detailed quotation package within 48 business hours.
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Get professional insights directly from our engineering team regarding processes, quality assurance, and lead times.
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