In the modern industrial landscape, Carbon Steel Precision Casting (often referred to as Lost Wax Casting or Investment Casting) serves as the backbone of high-stress mechanical systems. As a leading OEM Carbon Steel Precision Castings Manufacturer, JUNLONG Machinery Co., Ltd. recognizes that global enterprises no longer just seek parts; they seek reliable supply chain partners capable of delivering metallurgical integrity and dimensional precision that exceeds standard specifications.
The demand for precision carbon steel components is surging across sectors such as renewable energy, automotive lightweighting, and deep-sea oil exploration. Our 60,000 m² facility in Weifang, Shandong, is engineered to meet these challenges through a fusion of traditional craftsmanship and AI-optimized manufacturing workflows.
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Providing custom solutions that address the "Total Cost of Ownership" for procurement directors.
We manufacture corrosion-resistant ship parts and heavy-duty deck hardware using specialized carbon steel alloys that withstand extreme saline environments.
Certified investment castings for railway braking systems, couplers, and structural chassis components, ensuring safety and vibration resistance.
Durable wear-parts for harvesters and soil preparation equipment, optimized for high impact and abrasion resistance in diverse soil types.
High-precision cable protectors and valve accessories for oilfield operations, designed for high-pressure and high-temperature (HPHT) conditions.
Structural components for excavators and cranes where material fatigue resistance and high load-bearing capacity are non-negotiable.
TS 16949 compliant components for powertrain and suspension systems, focusing on weight reduction without compromising tensile strength.
Integrated Production Facility: From mold design to finished part machining.
Why JUNLONG Machinery stands as a world-class precision casting supplier.
1. Mold Manufacturing: In-house CNC toolroom for rapid prototyping and precision mold development.
2. Casting Excellence: Automated production lines significantly enhance manufacturing efficiency and product stability.
3. Precision Machining: Equipped with horizontal and vertical machining centers, CNC lathes, and grinders for "Ready-to-Install" components.
4. Surface Treatment: Comprehensive options including painting, powder coating, galvanizing, and electrophoresis.
ISO 9001, TS 16949, and UL certifications ensure that our management systems meet the rigorous demands of the US and EU markets.
Physical and chemical analysis equipment, including non-destructive testing (NDT), ensures every casting is defect-free.




Fortune 500 companies are increasingly shifting towards "Quality-First" sourcing in China. Our strategic location in Weifang allows us to leverage world-class logistics for seamless export to Germany, USA, Italy, and Canada.
We adhere to strict environmental standards, ensuring that our casting processes reduce waste and energy consumption, aligning with the sustainability goals of our European and American partners.
We provide 24/7 technical consulting, supporting DFM (Design for Manufacturing) feedback to help clients reduce material usage while increasing component strength.
Carbon steel provides excellent strength-to-weight ratios and is highly cost-effective for mass production. It allows for a wide range of heat treatment options to achieve specific hardness and toughness requirements.
Usually, mold design and prototyping take 2-4 weeks, with mass production following in 4-6 weeks depending on complexity and surface treatment requirements.
Every melt is tested using optical emission spectrometers. We provide Material Test Reports (MTRs) and 3.1 certificates upon request for full traceability.
Yes, investment casting (lost wax) is ideal for complex shapes that are impossible or too expensive to machine. We use ceramic cores for intricate internal passages.
Our company will continue to strengthen research and development efforts for new products and technologies, integrate advanced management and technical resources, and strive to become a world-class precision casting supplier!
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