In the evolving landscape of high-performance automotive engineering, 20CrNiMo alloy steel (equivalent to SAE 8620) has emerged as a cornerstone material. Known for its exceptional balance of high strength, toughness, and wear resistance, 20CrNiMo is particularly suited for components subjected to high fatigue and impact loads, such as transmission gears, camshafts, and heavy-duty drivetrain assemblies.
As a leading China 20CrNiMo Auto Parts Casting Manufacturer, JUNLONG Machinery leverages advanced metallurgical control to ensure that every casting meets the rigorous demands of the global automotive sector. The material's excellent hardenability and carburizing properties make it an indispensable choice for Tier 1 suppliers and OEMs aiming for durability and lightweighting in modern vehicle architectures.
Founded in 2014 and located in the industrial hub of Weifang, Shandong, JUNLONG Machinery Co., Ltd. has established itself as a premier destination for precision casting. Covering 60,000 square meters, we integrate the entire value chain—from initial mold design to high-precision CNC machining and finishing.
Our facility boasts an annual production capacity of 20,000 tons, specializing in diverse materials including carbon steel, alloy steel (20CrNiMo, 16Mn, etc.), and stainless steel (304, 316). We are not just a factory; we are a strategic manufacturing partner for the world's most demanding industries.
In the automotive industry, reliability is non-negotiable. JUNLONG adheres to the most stringent international standards, holding certifications for ISO 9001, IATF 16949 (TS 16949), and UL. Our quality management system ensures process control over every production detail, providing full traceability from the raw material ingot to the final machined component.
We utilize comprehensive physical and chemical analysis equipment, including spectrometers, tensile testers, and X-ray flaw detectors, to guarantee the mechanical properties and internal integrity of our 20CrNiMo castings.
With a robust export footprint spanning Germany, the United States, Italy, Canada, and beyond, we understand the nuances of global procurement. We provide localized support through dedicated account management, ensuring that language, time zones, and technical specifications are never a barrier to excellence.
Our engineers work directly with your design teams to optimize part geometry for the investment casting process, reducing material waste and lowering total cost of ownership (TCO).
Year Established
Square Meters Facility
Tons Annual Capacity
Expert Employees
Senior Technicians
JUNLONG employs internationally advanced automated casting production lines. By integrating AI-assisted monitoring and robotics, we achieve unprecedented consistency in shell building and pouring. This Information Gain in manufacturing data allows us to predict and eliminate defects before they occur, ensuring that complex 20CrNiMo auto parts are produced with tight tolerances and superior surface finishes.
Operating from Weifang gives us access to a world-class industrial cluster. This means shorter lead times for specialized raw materials, lower logistics costs, and a vast network of sub-tier processing experts. Our Full Industrial Chain Integrated Manufacturing model means mold making, casting, heat treatment, and precision machining are all done in-house, eliminating the "quality drift" often seen with multi-vendor outsourcing.
The global automotive industry is shifting toward green manufacturing. JUNLONG is at the forefront, implementing closed-loop water systems and energy-efficient induction furnaces. By choosing our 20CrNiMo castings, global enterprises can meet their ESG goals while benefiting from the high recyclability and longevity of alloy steel components.
Our 20CrNiMo gears and shafts are the heart of commercial vehicle transmissions. The material's high core strength after carburization ensures that components can withstand the extreme torque requirements of heavy-duty trucks and mining equipment.
In rail transportation, safety is paramount. Our precision-cast 20CrNiMo components are used in braking systems and coupler assemblies, where high impact resistance and fatigue life are critical for passenger safety.
The corrosion resistance and pressure-retaining capabilities of our alloy steel castings make them ideal for centralizers and high-pressure valves in the oil and gas sector, operating in harsh offshore and desert environments.
Equipped with horizontal machining centers, vertical machining centers, CNC lathes, and comprehensive physical/chemical testing labs, we provide a "One-Stop" solution from raw casting to assembly-ready components.
20CrNiMo offers significantly higher fatigue strength and toughness due to the addition of Chromium, Nickel, and Molybdenum. While carbon steel is sufficient for low-stress components, 20CrNiMo is essential for high-load parts like gears and shafts where failure is not an option.
Typically, mold manufacturing takes 15-25 days, and the first batch of samples follows within 7-10 days. Once the samples are approved, mass production usually takes 30-45 days depending on the complexity and volume of the order.
We utilize Magmasoft simulation during the design phase to predict solidification patterns. During production, we employ non-destructive testing (NDT) such as Ultrasonic Testing (UT) and Magnetic Particle Inspection (MPI) to ensure no internal shrinkage or porosity.
Yes. While we have a 20,000-ton capacity, our flexible automated lines and dedicated prototype shop allow us to efficiently handle smaller, highly complex orders for specialized machinery and high-end automotive applications.
Absolutely. We offer carburizing, quenching, tempering, and surface finishes like zinc plating, powder coating, and electrophoresis to meet your specific corrosion resistance and hardness requirements.
Partner with JUNLONG Machinery for industry-leading 20CrNiMo casting expertise. We combine the heritage of master craftsmanship with the speed of AI-integrated manufacturing.
Request a Quote Now
Junlong
