The main forgings for ship and port machinery are categorized into three types based on their functions:
Power transmission components such as crankshafts and connecting rods;
Steering components like rudder stocks and rudder pins;
Transmission components, including stern shafts and couplings.
These forgings play a crucial role in ship propulsion systems and port loading/unloading operations.
In the production process, strict material selection is conducted first, followed by forming via advanced forging technologies. Subsequent processes include precision machining and heat treatment to ensure optimal mechanical properties.
In terms of services, enterprises have established comprehensive after-sales service systems to respond quickly to customer issues. Leveraging rich experience and technical capabilities, they provide full-process support from design to delivery, offering high-quality products and services to meet the requirements of complex working conditions for ship and port machinery.
Key Term Explanations (Consistent with Industry Norms)
Crankshaft: The core power transmission component of ship engines, converting the reciprocating motion of pistons into rotational motion.
Rudder stock: Connects the steering gear and rudder blade, transmitting steering force to control the ship’s direction (consistent with the "rudder stock" translation in previous ship-related contexts).
Stern shaft: Also known as "propeller shaft" in some scenarios, it connects the ship’s main engine to the propeller, a critical component in the propulsion system (aligned with the earlier "marine stern shaft" terminology).
Heat treatment: A process to adjust the material’s hardness, toughness, and wear resistance (e.g., quenching and tempering for crankshafts to enhance fatigue resistance), ensuring the forgings withstand heavy loads and harsh operating environments.
ACE Group is a comprehensive enterprise group focused on the heavy industrial manufacturing sector, serving as a China Marine Forgings Manufacturers and Marine Forgings Factory. Its business spans forging, heat treatment, precision machining, welded structures, and heavy-duty power & free chain spraying production. This integrated layout covers the core production processes of the industrial machinery industry, combining technological strength with large-scale production capabilities.
Core Subsidiaries Details:
Jiangsu ACE Energy Technology Co., Ltd.: The group's core production base, officially commencing operations in November 2025. It occupies 55 acres with a total floor area exceeding 50,018 square meters. The factory is equipped with 3-ton, 5-ton, and 15-ton electro-hydraulic hammers; 1-meter and 1.5-meter vertical ring rolling machines; energy-efficient natural gas heating furnaces; heat treatment resistance furnaces; quenching tanks; induction hardening equipment; machining centers; and other production equipment.
Yancheng ACE Machinery Co., Ltd.: Established in 2019, it occupies 20 acres with a floor area of 13,333 square meters. It possesses an integrated welding-straightening structural steel production line and a precision machining workshop.
Yancheng ACE Surface Treatment Technology Co., Ltd.: Operates a heavy-duty power & free chain large-scale powder coating production line. Focusing on professional surface treatment technology, One-time coating thickness achieves 400μm, providing reliable anti-corrosion and weather-resistant protective performance and appearance optimization solutions, enhancing the group's full life-cycle product services.
ACE Group is supported by a management team of young key members who are experienced in materials, heat treatment, machining, and surface treatment industries. They are well-versed in international and domestic standards, pioneering, and committed to innovation. The subsidiary ACE Machinery has passed TÜV Rheinland ISO 9001 Quality Management System certification, as well as ISO 14001, 45001, and 50001 system certifications. It is recognised as a Specialised, Refined, Unique, and Innovative Enterprise, a National High-Tech Enterprise, and holds a 3A-level enterprise credit rating.
Relying on integrated MES and ERP management systems, the integration of informatisation and industrialisation, data cloud storage, and aiming to build a modern, energy-efficient enterprise, the group maintains a comprehensive inspection system. It possesses inspection tools, non-destructive testing equipment, and qualified personnel, implementing strict controls from material internal quality to appearance and dimensions. All outgoing products undergo 100% inspection, adhering to the business philosophy of pursuing 100% qualified outgoing products and zero customer complaints. A CNAS-standard laboratory will be established to provide scientific testing support for quality control during production and technological R&D, thereby enhancing product quality and technological innovation.
In the future, ACE Group will continue to leverage the technical advantages and industrial synergies of its subsidiaries. Through standardised production, specialised technology, integrated services, and a stringent quality control system, it is committed to providing efficient and reliable industrial manufacturing solutions for global clients, steadily advancing towards becoming a leading comprehensive manufacturing service provider in the industry.
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View MoreIn the maritime and logistics industry, equipment failure at sea or in a busy port isn't just an inconvenience—it’s a massive financial and safety risk. The propulsion and steering systems of a vessel must withstand constant salt spray, extreme torque, and the unrelenting rhythmic stress of the ocean.
To meet these high-stakes demands, Ship and Port Machinery Forgings serve as the backbone of maritime reliability. ACE Group leverages its integrated manufacturing capabilities—from heavy forging to high-thickness anti-corrosion coating—to produce components that exceed international maritime standards, ensuring that vessels and port cranes operate with peak efficiency and safety.
Marine forgings are specialized into three core functional categories. At ACE Group, we treat each category with specific metallurgical precision to ensure they handle their unique mechanical stresses.
Components like crankshafts and connecting rods translate thermal energy into mechanical motion. These parts face extreme fatigue cycles. Our 15-ton electro-hydraulic hammers ensure a dense internal structure that prevents micro-cracking over millions of revolutions.
Rudder stocks and rudder pins are the "nervous system" of a ship's direction. These require exceptional torsional strength and precision machining to ensure smooth, responsive steering in heavy seas.
Stern shafts and couplings transmit power to the propellers. Operating partially submerged, these components must possess both high tensile strength and superior resistance to seawater corrosion.
The following table highlights why ACE Group’s Ship and Port Machinery Forgings are the preferred choice for heavy-duty maritime applications:
| Feature | Technical Requirement | ACE Group Capability | Impact on Service Life |
| Material Integrity | Low impurity, high density | Vacuum degassed alloy steel + 15T Hammer forging | Reduces fatigue failure by 30% |
| Surface Protection | Marine-grade anti-corrosion | 400μm specialized powder coating | 3x resistance to salt spray |
| Dimensional Accuracy | High precision tolerances | Advanced CNC Machining Centers | Ensures perfect alignment, reducing vibration |
| Testing Standards | 100% Reliability | NDT (UT, MT, PT) & Class Society Certification | Guaranteed safety in extreme conditions |
What sets ACE Group apart is our Full Life-Cycle Production. We don't just forge; we finish.
Forging & Heat Treatment: At Jiangsu ACE Energy Technology, we use energy-efficient natural gas furnaces and induction hardening to achieve the perfect balance of surface hardness and core toughness.
Precision Machining: Our workshops provide the final dimensions required for complex components like stern shafts, ensuring they are ready for immediate installation.
Ultimate Protection: Through Yancheng ACE Surface Treatment Technology, we apply a heavy-duty coating. While industry standards often hover at lower thicknesses, our 400μm one-time coating provides an impenetrable shield against the corrosive maritime atmosphere.