Explore our flagship investment cast components engineered for heavy-duty automotive, commercial vehicle, and mechanical applications.
Founded in 2014, JUNLONG Machinery Co., Ltd. has established itself as an authoritative hub for heavy-duty, complex, and tight-tolerance metallurgical components in Weifang, Shandong Province—the core manufacturing nexus of China. Covering an expansive modern production area of 60,000 square meters, our facility integrates advanced lost-wax investment casting, automated shell molding, precision CNC machining, and comprehensive physical and chemical metallurgical diagnostics.
With an annual production capacity exceeding 20,000 metric tons of finished precision castings, JUNLONG serves high-tier global automotive, heavy-duty commercial truck, forklift, agricultural, and fluid control OEMs. Supported by a workforce of over 200 skilled specialists including more than 30 senior metallurgical and mechanical engineers, we bridge the gap between design conceptualization and mass-scale automotive supply chain integration.
Decoding the intent of Tier-1 procurement directors: Why global auto OEMs migrate toward precision investment casting manufacturers in China.
Modern powertrain and chassis architectures demand structural components with near-net shapes and optimized wall thicknesses down to 2.5mm without compromising tensile yield strength. Silica sol investment casting enables topological optimization, mitigating vehicle curb mass while retaining fatigue strength under high cyclic loads.
Automotive brake system components, steering knuckles, and engine brackets demand rigorous internal soundness. Utilizing non-destructive testing (NDT), X-ray flaw detection, magnetic particle testing, and ultrasonic inspection, cast parts achieve ISO/TS 16949 compliance, eliminating internal microporosity and blowholes.
By leveraging China's fully integrated industrial ecosystem in Shandong, buyers reduce multi-vendor logistics costs. Integrated mold toolmaking, casting, heat treatment, precise CNC finishing, and electro-plating under one roof yield up to 30% unit cost optimization compared to Western European foundries.
JUNLONG specializes in casting a diverse array of ferrous metals engineered for demanding automotive and industrial operational environments.
| Material Category | Standard Grades (ASTM / DIN / EN) | Mechanical Properties | Typical Automotive & Industrial Applications |
|---|---|---|---|
| Carbon Steel | WCB, WCC, AISI 1020, 1045, GS-45 | Tensile: 485-655 MPa, Yield: ≥275 MPa, Elongation: ≥22% | Truck chassis brackets, towing hooks, control levers, structural mounts. |
| Alloy Steel | 4140, 8620, 4340, 42CrMo4, 20CrNiMo | High hardness (HRC 45-55 post heat treatment), superior wear fatigue | Forklift load components, gearbox shifting forks, high-load steering joints. |
| Stainless Steel | 304, 304L, 316, 316L, 1.4408, CF8M, Duplex 2205 | Corrosion resistance, high thermal tolerance (>800°C), smooth surface Ra 3.2 | Turbocharger housings, exhaust manifolds, fluid control valves, marine parts. |
| Nickel Alloy Steel | Inconel 718, Monel 400, Hastelloy C-276 | Extreme corrosion resistance, oxidation resistance at high cryogenic & super-heat conditions | Specialized automotive sensors, offshore oil cable protectors, high-pressure pump valves. |
From 3D CAD modeling to precision CNC finishing—how our automated facility ensures micron-level precision.
High-precision aluminum dies combined with automated wax injection machinery to produce zero-shrinkage master wax patterns.
Multi-layer dipping in silica sol slurry and zircon sand in climate-controlled drying rooms to build high-refractory ceramic shells.
Steam autoclave dewaxing followed by high-temperature shell firing (>1000°C) and vacuum-assisted medium-frequency induction pouring.
Annealing, normalizing, quenching, and tempering tailored to refine grain structures and achieve exact physical yield requirements.
Final machining on 4-axis horizontal/vertical CNC centers, followed by CMM inspection, spectrographic chemistry check, and NDT validation.
Our machining workshop is equipped with horizontal machining centers, vertical machining centers, CNC lathes, CNC milling machines, precision grinders, and specialized gear cutting equipment. By executing casting, machining, and surface treatments under a unified quality control protocol, JUNLONG eliminates single-point delivery delays and quality disputes.
Delivering high-reliability casting solutions across diverse global industrial sectors.
Engine brackets, brake caliper housings, turbocharger exhaust housings, steering knuckles, shift forks, and suspension linkages manufactured to stringent automotive tolerances.
Heavy load-bearing mast rollers, high-tensile forklift chain anchors, hydraulic pump bodies, and steering axle components subjected to constant stress and strain.
Wear-resistant excavator tooth adapters, harvester blade brackets, tractor hitch components, and heavy tiller hubs forged to withstand extreme field environments.
304 and 316 stainless steel pressure-rated valve bodies, pump impellers, oil cable protectors, and high-pressure pipe fittings designed for zero-leakage durability.
High-nickel alloy corrosion-resistant deck fittings, rudder hinges, marine pump casings, and propeller blade supports optimized for saltwater exposure.
Bogging components, brake disc clamps, coupler knuckles, and architectural structural clamps meeting EN 15085 welding and structural casting benchmarks.
To assure customer satisfaction across Tier-1 markets in Germany, the United States, Italy, Canada, and Japan, JUNLONG maintains rigorous process governance backed by international certifications:
Every single melt undergoes spectrographic heat verification, ultrasonic flaw testing, magnetic particle crack detection, and coordinate measuring machine (CMM) dimensional checks prior to shipment dispatch.
Addressing core procurement inquiries, metallurgical capabilities, and export logistics.
Our silica sol investment casting process routinely achieves ISO 8062 / DCTG 4 to DCTG 6 dimensional tolerances, and linear tolerances within ±0.1 mm per 25 mm. For critical functional dimensions, our CNC machining workshop refines tolerances down to IT7 to IT6 (micrometer precision).
We utilize MAGMA/AnyCasting solidification simulation software prior to mold creation to optimize sprue gate locations and riser geometry. During production, liquid metal undergoes vacuum degassing, and 100% of safety-critical parts undergo X-ray digital radiography (NDT) and hydraulic pressure testing.
Rapid prototyping can deliver 3D printed sand or wax samples within 7-10 days. Standard aluminum mold toolmaking typically requires 20-30 days, followed by sample casting, heat treatment, machining, and full PPAP Level 3 documentation submission within 15 days of first casting run.
Components are treated with rust-preventative anti-corrosion oil, vacuum-wrapped in VCI vapor corrosion inhibitor bags, boxed in heavy-duty corrugated cartons, and secured in heat-treated fumigation-free wooden cases (ISPM 15 compliant) tailored for ocean freight moisture conditions.
Partner with JUNLONG Machinery for reliable investment casting, competitive factory-direct pricing, and IATF 16949 certified quality assurance.
Browse our expanded catalog of lost wax castings engineered for forklifts, pumps, trucks, and heavy machinery.
Junlong
