In the modern industrial landscape, the demand for high-strength, dimensionally accurate components has never been higher. China Carbon Steel Precision Casting has emerged as a global benchmark, combining the cost-efficiency of Lost Wax Casting (Investment Casting) with sophisticated Heat Treatment protocols. As a leading manufacturer, JUNLONG Machinery Co., Ltd. integrates decades of metallurgical expertise to provide "Information Gain" to our clients—going beyond simple part production to offer lifecycle durability and material optimization.
Carbon steel, specifically grades like 16Mn, 20Mn5, and standard AISI 1020-1045, provides the ideal balance of toughness and weldability. However, the true value lies in the post-casting heat treatment. Processes such as Normalizing, Quenching, and Tempering are not just options; they are essential steps to refine grain structure and unlock the mechanical potential required for automotive, rail transit, and heavy machinery applications.
Established 2014
60,000 m² Facility
20,000 Tons Annual Capacity
Annual Tonnage
Expert Employees
R&D Engineers
Quality Traceability
Utilizing high-grade silica sol and water glass processes to achieve tolerances within CT4-CT6. Our automated production line ensures zero-defect molds and consistent shell integrity for complex geometries.
Our in-house thermal facility specializes in:
Equipped with spectrometers, ultrasonic testing (UT), and magnetic particle inspection (MPI) to ensure every carbon steel part meets international ASTM, DIN, and JIS standards.
Supplying high-stress engine brackets, steering knuckles, and transmission housings. Carbon steel precision casting reduces vehicle weight while maintaining structural safety.
Certified for railway transit components. Our custom 16Mn and 20Mn5 parts withstand the extreme vibration and fatigue cycles of modern high-speed rail systems.
Wear-resistant components for excavators and loaders. We optimize material toughness to handle abrasive environments in mining and heavy construction.
Oil cable centralizers and valve bodies. Our heat-treated castings offer superior corrosion resistance and pressure ratings for deep-well operations.
Based in Weifang, Shandong—the heart of China’s casting industry—JUNLONG Machinery leverages a complete Integrated Manufacturing Chain. This localization allows us to source raw materials, conduct precision machining, and execute surface treatments within a 50km radius, significantly reducing lead times and logistical risks.
Our resilience is built on Vertical Integration. From mold design (CAD/CAM) to CNC finish machining, we eliminate sub-supplier dependencies. This is why global leaders in Germany, Italy, and the USA trust us as their primary Tier-1 supplier for mission-critical carbon steel components.
Standardized Quality Management Systems.
Automotive Grade Quality Assurance.
Global Safety and Material Compliance.
100% Visual and Dimensional Verification.
Carbon steel offers excellent weldability and cost-effectiveness for structural components. While alloy steel provides specialized properties like extreme corrosion or heat resistance, carbon steel (when heat-treated) provides the necessary strength-to-weight ratio for 80% of industrial machinery applications.
As-cast components often have uneven grain structures. Heat treatment (like normalizing) homogenizes the grain, improving tensile strength and ductility. For parts requiring surface hardness, we employ induction hardening or carburizing.
Generally, mold development takes 2-3 weeks, followed by sample production. Once approved, mass production typically ranges from 4-6 weeks depending on volume and the complexity of the heat treatment required.
Yes. We have a fully equipped CNC workshop with vertical and horizontal machining centers, ensuring that your parts are delivered "ready-to-assemble."
The precision casting industry is moving towards Industry 4.0. JUNLONG is currently integrating digital simulation software to predict casting defects before the first pour. Furthermore, we are committed to sustainable manufacturing by optimizing our melting efficiency and recycling over 95% of our casting sand. Our roadmap involves expanding our Precision Finished Parts capacity to better serve the emerging New Energy Vehicle (NEV) and Aerospace sectors.
Junlong
