About JUNLONG Machinery
Founded in 2014 and situated in the industrial hub of Weifang, Shandong, JUNLONG Machinery Co., Ltd. has emerged as a vanguard in the global precision casting sector. Spanning 60,000 square meters, our facility represents the pinnacle of metallurgical innovation, boasting an annual production capacity of 20,000 tons. We specialize in the sophisticated manipulation of carbon steel, alloy steel, and stainless steel, transforming raw materials into high-integrity components for the world's most demanding industries.
In the current landscape of global industrial manufacturing, the demand for Q345B Steel Precision Casting has seen an unprecedented surge. Q345B, a low-alloy high-strength structural steel, is prized for its exceptional yield strength (≥345 MPa), superior weldability, and impact toughness at low temperatures. As infrastructure projects scale globally—from offshore oil rigs in the North Sea to heavy-duty mining equipment in Western Australia—the transition from traditional sand casting to high-precision Lost Wax Casting (Investment Casting) is no longer optional; it is a prerequisite for safety and efficiency.
As a leading manufacturer, we observe that Tier-1 engineering firms are increasingly moving away from "commodity casting" towards "engineered casting solutions." This shift is driven by the need for weight reduction without compromising structural integrity, a feat achievable through the precise chemical composition control found in Q345B steel.
Dominating markets in Germany, USA, Italy, and Canada through consistent ISO-compliant quality delivery.
Q345B offers the perfect balance between cost-efficiency and high mechanical performance in extreme environments.
Our Shandong-based operations leverage China's world-class logistics and raw material proximity.
The roadmap for Q345B precision casting is evolving toward Digital Twin Manufacturing and AI-Assisted Thermal Analysis. At JUNLONG, we are integrating these future-forward technologies into our current production lines. By simulating the solidification process of molten Q345B steel, we can predict and eliminate potential defects like shrinkage porosity and thermal cracking before the first mold is even poured.
Future Outlook (2025-2030): We anticipate a move toward "Green Casting" protocols. This involves the recycling of 98% of investment casting wax and the implementation of carbon-capture technologies within the smelting furnace. Furthermore, 3D sand printing for rapid prototyping of large-scale Q345B components is becoming a standard offering, reducing lead times from months to weeks.
Key Technical Milestone: Implementation of real-time spectral analysis for every batch of Q345B, ensuring Manganese (Mn) and Silicon (Si) levels are optimized for maximum fracture toughness.
Due to its high impact resistance at -20°C, our Q345B castings are preferred for pipeline supports and structural clamps in Northern Canada and Scandinavian regions.
In the abrasive environments of African gold and copper mines, our precision-cast forklift and excavator components provide 30% longer service life than standard carbon steel.
Corrosion-resistant treated Q345B precision parts are vital for valve bodies and cable protectors in the high-salinity coastal environments of the GCC countries.
Railway parts requiring high fatigue strength are manufactured using vacuum-degassed Q345B steel to meet the rigorous safety standards of the region's expanding rail networks.
Providing precision structural hubs for small-scale wind turbines and solar tracking mechanisms where dimensional accuracy is critical for mechanical efficiency.
Integrating into the "Just-In-Time" supply chains of North American truck manufacturers with TS 16949 certified casting components.
Why is the Weifang, Shandong cluster the epicenter of global precision casting? It comes down to "Cluster Resilience." Within a 100km radius of JUNLONG, we have access to high-purity alloy additives, world-class mold-making artisans, and state-of-the-art logistics nodes. This ecosystem allows us to maintain a 99.8% on-time delivery rate even during global shipping fluctuations.
Our 60,000 m² factory acts as a vertically integrated powerhouse. From internal mold manufacturing to final surface treatment (Zinc plating, Electrophoresis, Powder coating), we eliminate "third-party lag." This integration allows for Full Industrial Chain Traceability—a critical requirement for our clients in the aerospace and rail sectors.
The company has obtained ISO 9001, TS 16949, and UL certifications. We employ a multi-layered quality gate system including Ultrasonic Testing (UT), Magnetic Particle Inspection (MPI), and CMM dimensional verification to ensure every Q345B component meets or exceeds ASTM and DIN standards.
Q345B is a low-alloy steel that offers significantly higher yield strength and better performance in cold-weather conditions. It is ideal for structural components that must endure heavy loads while maintaining a lighter profile than traditional carbon steels.
For new projects, mold development typically takes 15-20 days, followed by sample production in 7-10 days. Once the sample is approved, mass production usually spans 30-45 days depending on the complexity and volume.
Yes. We are not just a foundry; we have a fully equipped CNC workshop. We provide finish-machining to tolerances as tight as ±0.01mm, ensuring parts are "Ready-to-Assemble" upon arrival.
We use non-destructive testing (NDT) methods such as X-ray inspection and Ultrasonic Testing to verify there are no internal blowholes, cracks, or shrinkage defects within the metal matrix.
Absolutely. Our documentation satisfies all EU and US regulatory requirements, including Material Test Reports (MTRs) to EN 10204 3.1 standards and REACH/RoHS compliance certifications.
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